GOST 977-88

• gost-977-88.pdf (1.19 MiB)
  ГОСТ 977-88

GOST 977−88 steel Castings. General specifications

GOST 977−88
Group В82
INTERSTATE STANDARD
STEEL CASTINGS
General specifications
Steel castings. General specifications
ISS 77.140.80
OKP 41 1200

Date of introduction 1990−01−01
INFORMATION DATA

1. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 22.12.88 N 4458

2. The standard fully complies ST SEV 4559−84, ST SEV 4561−84 and ST SEV 4563−84 in part brands

3. INSTEAD 977−75 GOST, GOST 2176−77

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	Item number
GOST 1497−84	5.5
GOST 1763−68	5.10
GOST 3212−92	3.4
GOST 6032−89	5.12
GOST 6130−71	5.11
GOST 7565−81	4.4, 5.2
GOST 9012−59	5.8
GOST 9013−59	5.8
GOST 9454−78	5.6
GOST 9651−84	5.13
GOST 10145−81	5.14
GOST 11150−84	5.13
GOST 12344−2003	5.1
GOST 12345−2001	5.1
GOST 12346−78	5.1
GOST 12347−77	5.1
GOST 12348−78	5.1
GOST 12349−83	5.1
GOST 12350−78	5.1
GOST 12351−2003	5.1
GOST 12352−81	5.1
GOST 12354−81	5.1
GOST 12355−78	5.1
GOST 12356−81	5.1
GOST 12357−84	5.1
GOST 12359−99	5.1
GOST 12360−82	5.1
GOST 12361−82	5.1
GOST 22536.0−87	5.1
GOST 22536.1−88	5.1
GOST 22536.2−87	5.1
GOST 22536.3−88	5.1
GOST 22536.4−88	5.1
GOST 22536.5−87	5.1
GOST 22536.7−88	5.1
GOST 22536.8−87	5.1
GOST 22536.9−88	5.1
GOST 22536.10−88	5.1
GOST 22536.11−87	5.1
GOST 22536.12−88	5.1
GOST 22536.14−88	5.1
GOST 26645−85	3.4
GOST 28473−90	5.1

5. Limitation of actions taken by Protocol No. 7−95 interstate Council for standardization, Metrology and certification (ICS 11−95)

6. REPRINTING. August 2004
This standard applies to steel castings manufactured by all the methods of casting of non-alloy and alloy steels, stainless with special properties cast steels.

1. BRAND

1.1. For the manufacture of castings includes the following steel grades:
structural non-alloy:
15L, 20L, 25L, 30L, 35L, 40L, 45L, 50L;

structural alloy:
20GL, 35GL, 20GSL, 30GSL, 20G1FL, 20FL, 30KHGSFL, 45FL, 32KH06L, 40KHL, 20HML, 20KHMFL, 20GNMFL, 35HML, 30KHNML, 35HGSL, 35NGML, 20DKHL, 08GDNFL, 13KHNDFTL, 12DN2FL, 12DKHN1MFL, 23KHGS2MFL, 12KH7G3SL, 25KH2GNMFL, 27KH5GSML, 30KH3S3GML, 03N12KH5M3TL, 03N12KH5M3TJUL;
structural alloy used in the contractual legal relations between the member countries of the CMEA:
15GL, 30GL, 45GL, 70GL, 55SL, 40G1, 5FL, 15ФЛ, 30KHL, 25KHGL, 35KHGL, 50KHGL, 60KHGL, 70KH2GL, 35KHGFL, 40KHFL, 30KHML, 40KHML, 40KHNL, 40KHN2L, 30KHG1, 5MFRL, 75KHNMFL, 40GTL, 20GNMJUL;

alloy with special properties:

a) martensite class
20KH13L, 08KH14NDL, 09KH16N4BL, 09KH17N3SL, 10KH12NDL — corrosion resistant; 20KH5ML, 20KH8VL, 40KH9S2L heat — resistant; 20KH12VNMFL — resistant; 85KH4M5F2V6L (Р6М5Л), 90KH4M4F2V6L (Р6М4Ф2Л) — high speed;

b) martensitic-ferritic class
15KH13L — corrosion resistant;

C) ferritic
15KH25TL — corrosion resistant;

d) austenitic-martensitic class
08KH15N4DML, 08KH14N7ML, 14KH18N4G4L — corrosion resistant;

d) austenitic-ferritic class
12KH25N5TMFL, 16KH18N12S4TJUL, 10Х18НЗГЗД2Л — corrosion resistant; 35KH23N7SL, 40KH24N12SL, 20KH20N14S2L heat — resistant;

e) austenitic
10KH18N9L, 12H18N9TL, 10KH18N11BL, 07KH17N16TL, 12H18N12M3TL and corrosion — resistant; 55KH18G14S2TL, 15KH23N18L, 20KH25N19S2L, 18KH25N19SL, 45KH17G13N3JUL heat — resistant; 35KH18N24S2L, 31KH19N9MVBTL, 12KH18N12BL, 08KH17N34V5T3JU2RL, 15KH18N22V6M2RL, 20KH21N46V8RL — resistant; 110G13L, 110G13KH2BRL, 110G13FTL, 130G14KHMFAL, 120G10FL wear — resistant;

alloy with special properties, used in the contractual legal relations between the member countries of the CMEA:

a) martensitic-ferritic class

15KH14NL, 08KH12N4GSML — corrosion resistant;

b) an austenitic-ferritic class

12KH21N5G2SL, 12KH21N5G2STL, 12KH21N5G2SM2L, 12KH19N7G2SAL, 12KH21N5G2SAL, 07KH18N10G2S2M2L; 15KH18N10G2S2M2L, 15KH18N10G2S2M2TL — corrosion resistant.

The scope of structural alloy steels given in Annex 1, doped with special properties — in Appendix 2.

1.2. Steel is smelted in furnaces with basic linings. Allowed the smelting of steel in furnaces with acid linings subject to the requirements of this standard.

Note. The possibility of application of Converter steel should be specified in the design documentation (DD) and (or) normative-technical documentation (NTD).

1.3. Chemical composition of structural non-alloy and alloy steel must meet the specified in table.1, alloy steel with special properties — in table.2.
Table 1

Steel grade			Mass fraction of element, %
OKP code	Marking according to GOST 977	Refer to the teachings according to ST SEV	Carbon	Manganese	Silicon	Phosphorus	Sulfur	Chrome
						no more
Structural steel non-alloy
41 1200	15L	52731 51731	0,12−0,20	0,45−0,90	0,20−0,52	According to table.4	According to table.4	-
	20L	-	0,17−0,25	0,45−0,90	0,20−0,52	The same	The same	-
	25L	52821 51821	0,22−0,30	0,45−0,90	0,20−0,52	«	«	-
	30L	-	0,27−0,35	0,45−0,90	0,20−0,52	«	«	-
	35L	52831 51831	0,32−0,40	0,45−0,90	0,20−0,52	«	«	-
	40L	52861 51861	0,37−0,45	0,45−0,90	0,20−0,52	«	«	-
	45L	52862 51862	0,42−0,50	0,45−0,90	0,20−0,52	«	«	-
	50L	-	0,47−0,55	0,45−0,90	0,20−0,52	«	«	-
Structural steel alloy
41 1220	20GL	52763	0,15−0,25	1,20−1,60	0,20−0,40	0,040	0,040	-
	35GL	52833	0,30−0,40	1,20−1,60	0,20−0,40	0,040	0,040	-
	20GSL	-	0,16−0,22	1,00−1,30	0,60−0,80	0,030	0,030	-
	30GSL	52834	0,25−0,35	1,10−1,40	0,60−0,80	0,040	0,040	-
	20G1FL	55244	0,16−0,25	0,90−1,40	0,20−0,50	0,050	0,050	-
	20FL	55242	0,14−0,25	0,70−1,20	0,20−0,52	0,050	0,050	-
	30KHGSFL	55142	0,25−0,35	1,00−1,50	0,40−0,60	0,050	0,050	0,30−0,50
	45FL	55243	0,42−0,50	0,40−0,90	0,20−0,52	According to table.4	According to table.4	-
	32KH06L	-	0,25−0,35	0,40−0,90	0,20−0,40	0,050	0,050	0,50−0,80
	40KHL	55111	0,35−0,45	0,40−0,90	0,20−0,40	0,040	0,040	0,80−1,10
	20HML	-	0,15−0,25	0,40−0,90	0,20−0,42	0,040	0,040	0,40−0,70
	20KHMFL	-	0,18−0,25	0,60−0,90	0,20−0,40	0,025	0,025	0,90−1,20
	20GNMFL	-	0,14−0,22	0,70−1,20	0,20−0,40	0,030	0,030	Not more than 0.30
	35HML	55432	0,30−0,40	0,40−0,90	0,20−0,40	0,040	0,040	0,80−1,10
	30KHNML	55711	0,25−0,35	0,40−0,90	0,20−0,40	0,040	0,040	1,30−1,60
	35HGSL	55812	0,30−0,40	1,00−1,30	0,60−0,80	0,040	0,040	0,60−0,90
	35NGML	-	0,32−0,42	0,80−1,20	0,20−0,40	0,040	0,040	-
	20DKHL	-	0,15−0,25	0,50−0,80	0,20−0,40	0,040	0,040	0,80−1,10
	08GDNFL	55781	Not more than 0.10	0,60−1,00	0,15−0,40	0,035	0,035	-
	13KHNDFTL	55782	Not more than 0.16	0,40−0,90	0,20−0,40	0,030	0,030	0,15−0,40
	12DN2FL	55783	0,08−0,16	0,40−0,90	0,20−0,40	0,035	0,035	-
	12DKHN1MFL	55761	0,10−0,18	0,30−0,55	0,20−0,40	0,030	0,030	1,20−1,70
	23KHGS2MFL	55451	0,18−0,24	0,50−0,80	1,80−2,00	0,025	0,025	0,60−0,90
	12KH7G3SL	-	0,10−0,15	3,00−3,50	0,80−1,20	0,020	0,020	7,00−7,50
	25KH2GNMFL	-	0,22−0,30	0,70−1,10	0,30−0,70	0,025	0,025	1,40−2,00
	27KH5GSML	-	0,24−0,28	0,90−1,20	0,90−1,20	0,020	0,020	5,00−5,50
	30KH3S3GML	-	0,29−0,33	0,70−1,20	2,80−3,20	0,020	0,020	2,80−3,20
	03N12KH5M3TL	-	0,01−0,04	0.20	0.20	0,015	0,015	4,50−5,00
	03N12KH5M3TJUL	-	0,01−0,04	0.20	0.20	0,015	0,015	4,50−5,00
	Structural steel alloy used in legal relations between the countries — members of CMEA
	15GL	52711	0,12−0,18	0,70−1,00	0,30−0,60	0,040	0,040	-
	30GL	52832	0,25−0,32	1,40−1,70	0,20−0,50	0,040	0,040	-
	45GL	52864	0,40−0,50	0,80−1,20	0,20−0,50	0,040	0,040	-
	70GL	51931	0,65−0,80	1,10−1,60	0,20−0,50	0,045	0,045	-
	55SL	51891	0,52−0,60	0,50−0,80	0,50−0,70	0,045	0,045	-
	40G1, 5FL	55241	0,35−0,45	1,60−1,90	0,20−0,50	0,040	0,040	-
	15KHL	55115	0,12−0,18	0,40−0,60	0,20−0,50	0,040	0,040	0,50−0,80
	30KHL	55116	0,25−0,35	0,50−0,90	0,20−0,50	0,040	0,040	0,50−0,80
	25KHGL	55117	0,20−0,30	0,85−1,15	0,20−0,50	0,040	0,040	0,90−1,30
	35KHGL	55118	Of 0.30−0.45	0,60−0,90	0,50−0,75	0,040	0,040	0,50−0,80
	50KHGL	55114	0,45−0,60	0,50−0,90	0,20−0,50	0,040	0,040	0,60−0,90
	60KHGL	55112	0.50 to 0.65	0,90−1,30	0,20−0,50	0,050	0,050	0,90−1,30
	70KH2GL	55113	0,60−0,75	0,80−1,20	0,20−0,50	0,050	0,050	1,80−2,20
	35KHGFL	55141	0,28−0,38	Of 1.00 to 1.40	0,20−0,50	0,040	0,040	0,20−0,60
	40KHFL	55181	0,35−0,45	0,50−0,80	0,20−0,50	0,040	0,040	Of 1.00 to 1.40
	30KHML	55433	0,25−0,35	0,50−0,80	0,20−0,50	0,040	0,040	0,80−1,20
	40KHML	55434	0,38−0,45	0,50−0,80	0,20−0,50	0,040	0,040	0,80−1,20
	40KHNL	55811	0,35−0,45	0,40−0,90	0,20−0,50	0,040	0,040	0,50−0,80
	40KHN2L	55813	0,35−0,45	0,60−0,90	0,20−0,50	0,045	0,045	0,40−0,70
	30KHG1, 5MFRL	55471	0,25−0,32	1,40−1,80	0,40−0,50	0,030	0,025	0,50−1,00
	75KHNMFL	55762	0,70−0,85	0,60−0,90	0,20−0,50	0,050	0,050	1,30−1,70
	40GTL	55771	0,34−0,42	1,20−1,60	0,20−0,50	0,045	0,045	-
	20GNMJUL	55772	0,16−0,23	1,10−1,60	0,20−0,50	0,035	0,035	-

Extension table 1

Steel grade			Mass fraction of element, %
OKP code	Marking according to GOST 977	Refer to the teachings according to ST SEV	Nickel	Moth bden	Vana- DIY	Copper	Titan	Bor	Alu- mini
Structural steel non-alloy
41 1220	15L	52731 51731	-	-	-	-	-	-	-
	20L	-	-	-	-	-	-	-	-
	25L	52821 51821	-	-	-	-	-	-	-
	30L	-	-	-	-	-	-	-	-
	35L	52831 51831	-	-	-	-	-	-	-
	40L	52861 51861	-	-	-	-	-	-	-
	45L	52862 51862	-	-	-	-	-	-	-
	50L	-	-	-	-	-	-	-	-
Structural steel alloy
	20GL	52763	-	-	-	-	-	-	-
	35GL	52833	-	-	-	-	-	-	-
	20GSL	-	-	-	-	-	-	-	-
	30GSL	52834	-	-	-	-	-	-	-
	20G1FL	55244	-	-	0,06−0,12	-	Not more than 0.05	-	-
	20FL	55242	-	-	0,06−0,12	-	-	-	-
	30KHGSFL	55142	-	-	0,06−0,12	-	-	-	-
	45FL	55243	-	-	Of 0.05−0.10	-	Not more than 0.03	-	-
	32KH06L	-	-	-	-	-	-	-	-
	40KHL	55111	-	-	-	-	-	-	-
	20HML	-	-	0,40−0,60	-	-	-	-	-
	20KHMFL	-	-	0,50−0,70	0,20−0,30	-	-	-	-
	20GNMFL	-	0,70−1,00	0,15−0,25	0,06−0,12	-	-	-	-
	35HML	55432	-	0,20−0,30	-	-	-	-	-
	30KHNML	55711	1,30−1,60	0,20−0,30	-	-	-	-	-
	35HGSL	55812	-	-	-	-	-	-	-
	35NGML	-	0,80−1,20	0,15−0,25	-	-	-	-	-
	20DKHL	-	-	-	-	1,40−1,60	-	-	-
	08GDNFL	55781	1,15−1,55	-	On the calculation of 0.10	0,80−1,20	-	-	-
	13KHNDFTL	55782	1,20−1,60	-	0,06−0,12	0,65−0,90	0,04−0,10	-	-
	12DN2FL	55783	1,80−2,20	-	0,08−0,15	1,20−1,50	-	-	-
	12DKHN1MFL	55761	1,40−1,80	0,20−0,30	0,08−0,15	0,40−0,65	-	-	-
	23KHGS2MFL	Fifty five thousand four hundred fifty one	-	0,25−0,30	0,10−0,15	-	-	-	-
	12KH7G3SL	-	-	-	-	-	-	-	-
	25KH2GNMFL	-	0,30−0,90	0,20−0,50	0,04−0,20	-	-	-	-
	27KH5GSML	-	-	0,55−0,60	-	-	-	-	-
	30KH3S3GML	-	-	0.50 to 0.60	-	-	-	-	-
	03N12KH5M3TL	-	12,00−12,50	2,50−3,00	-	-	0,70−0,90	-	-
	03N12KH5M3TJUL	-	12,00−12,50	2,50−3,00	-	-	0,70−0,90	-	0,25−0,45
	Structural steel alloy used in legal relations between the countries — members of CMEA
	15GL	52711	-	-	-	-	-	-	-
	30GL	52832	-	-	-	-	-	-	-
	45GL	52864	-	-	-	-	-	-	-
	70GL	51931	-	-	-	-	-	-	-
	55SL	51891	-	-	-	-	-	-	-
	40G1, 5FL	55241	-	-	0,10−0,20	-	-	-	-
	15KHL	55115	-	-	-	-	-	-	-
	30KHL	55116	-	-	-	-	-	-	-
	25KHGL	55117	-	-	-	-	-	-	-
	35KHGL	55118	-	-	-	-	-	-	-
	50KHGL	55114	-	-	-	-	-	-	-
	60KHGL	55112	-	-	-	-	-	-	-
	70KH2GL	55113	-	-	-	-	-	-	-
	35KHGFL	55141	-	-	0,10−0,25	-	-	-	-
	40KHFL	55181	-	-	0,15−0,30	-	-	-	-
	30KHML	55433	-	0,20−0,30	-	-	-	-	-
	40KHML	55434	-	0,20−0,30	-	-	-	-	-
	40KHNL	55811	1,00−1,50	-	-	-	-	-	-
	40KHN2L	55813	1,60−2,00	-	-	-	-	-	-
	30KHG1, 5MFRL	55471	-	0,40−0,60	0,20−0,40	-	-	0,006−0,010	-
	75KHNMFL	55762	0,50−0,80	0,40−0,60	0,10−0,25	-	-	-	-
	40GTL	55771	-	-	-	-	0,02−0,10	-	-
	20GNMJUL	55772	0,30−0,50	0,15−0,30	-	-	-	-	Of at least 0.01

Notes:

1. The presence of elements of non-alloying, their allowable content and the need for control is established in the design documentation and (or) NTD.

2. At the request of the consumer the contents of sulphur and phosphorus in alloyed structural steel can be installed not more than 0,030%.

3. In the smelting alloy steels in furnaces with acid linings permissible mass fraction of sulfur and phosphorus may be increased by 0,010% each, provided that the other requirements of this standard.

4. For steel grade 40KHNL allowed the introduction of titanium to 0.15% to improve its mechanical properties.

5. For steels with grades of 15L, 25L, 35L, 40L, 45L, given the designation according to ST SEV 4559−84 for other steels — according to ST SEV 4561−84.

Table 2

The class began	Code OKP	Steel grade			Mass fraction of element, %
		Designation according to GOST 977	Train- the beginning tion according to ST SEV 4563−84		Carbon		Silicon	Manganese	Chrome	Nickel	Molyb- den	Vanadium	WOL- FRAM	Titan	Niobium	Bor	Nitrogen	Alu- mini	Copper	TSE- riy	Sulfur	Foz Fort
																	no more
Alloy steel with special properties
Martin Sitno	41 1240	20KH13L	58113			0,16−0,25	0,20−0,80	0,30−0,80	12,0−14,0	-	-	-	-	-	-	-	-	-	-	-	0,025	0,030
		08KH14NDL	-			Not more than 0.08	Not more than 0.40	0,50−0,80	13,0−14,5	1,20−1,60	-	-	-	-	-	-	-	-	0,80−1,20	-	0,025	0,025
		09KH16N4BL	-			0,05−0,13	0,20−0,60	0,30−0,60	15,0−17,0	3,50−4,50	-	-	-	-	0,05−0,20	-	-	-	-	-	0,025	0,030
		09KH17N3SL	-			0,05−0,12	0,80−1,50	0,30−0,80	15,0−18,0	2,80−3,80	-	-	-	-	-	-	-	-	-	-	0,030	0,035
		20KH5ML	-			0,15−0,25	0,35−0,70	0,40−0,60	4,0−6,5	-	0,40−0,65	-	-	-	-	-	-	-	-	-	0,040	0,040
		20KH8VL	-			0,15−0,25	0,30−0,60	0,30−0,50	7,5−9,0	-	-	-	1,25−1,75	-	-	-	-	-	-	-	0,035	0,040
		40KH9S2L	-			0,35−0,50	2,00−3,00	0,30−0,70	8,0−10,0	-	-	-	-	-	-	-	-	-	-	-	0,030	0,035
		20KH12VNMFL	-			0,17−0,23	0,20−0,60	0,50−0,90	10,5−12,5	0,50−0,90	0,50−0,70	0,15−0,30	0,70−1,10	-	-	-	-	-	-	-	0,025	0,030
		10KH12NDL	-			Not more than 0.10	0,17−0,40	0,20−0,60	12,0−13,0	1,00−1,50	-	-	-	-	-	-	-	-	0,80−1,10	-	0,025	0,025
Martin Sitno — ferrite- NY	41 1240	15KH13L	58112			Not more than 0.15	0,20−0,80	0,30−0,80	12,0−14,0	-	-	-	-	-	-	-	-	-	-	-	0,025	0,030
Ferrite- NY	41 1240	15KH25TL	-			0,10−0,20	0,50−1,20	0,50−1,80	23,0−27,0	-	-	-	-	0,40−0,80	-	-	-	-	-	-	0,030	0,035
The superheater- nano — Martin- Sitno	41 1240	08KH15N4DML	-			Not more than 0.08	Not more than 0.40	1,00−1,50	14,0−16,0	3,50−3,90	Of 0.30−0.45	-	-	-	-	-	-	-	Of 1.00 to 1.40	-	0,025	0,025
		08KH14N7ML	-			Not more than 0.08	0,20−0,75	0,30−0,90	13,0−15,0	6,00−8,50	0,50−1,00	-	-	-	-	-	-	-	-	-	0,030	0,030
		14KH18N4G4L	-			Not more than 0,14	0,20−1,00	4,00−5,00	16,0−20,0	4,00−5,00	-	-	-	-	-	-	-	-	-	-	0,030	0,035
The superheater- nano — ferrite- NY	41 1240	12KH25N5TMFL	-			Not more than 0.12	0,20−1,00	0,30−0,80	23,5−26,0	5,00−6,50	0,06−0,12	0,07−0,15	-	0,08−0,20	-	-	0,08−0,20	-	-	-	0,030	0,030
		16KH18N12S4TJUL	-			0,13−0,19	3,80−4,50	0,50−1,00	17,0−19,0	11,00−13,00	-	-	-	0,40−0,70	-	-	-	0,13−0,35	-	-	0,030	0,030
		35KH23N7SL	-			Not more than 0.35	0,50−1,20	0,50−0,85	21,0−25,0	6,00−8,00	-	-	-	-	-	-	-	-	-	-	0,035	0,035
		40KH24N12SL	-			Not more than 0.40	0,50−1,50	0,30−0,80	22,0−26,0	11,00−13,00	-	-	-	-	-	-	-	-	-	-	0,030	0,035
		20KH20N14S2L	-			0.20	2,00−3,00	Not more than 1.50	19,0−22,0	12,00−15,00	-	-	-	-	-	-	-	-	-	-	0,025	0,035
		10KH18N3G3D2L	-			Not more than 0.10	Not more than 0,60	2,30−3,00	13,0−19,0	3,00−3,50	-	-	-	-	-	-	-	-	1,80−2,20	-	0,030	0,030
The superheater- magnetic	41 1240	10KH18N9L	58762 58511			Not more than 0,14	0,20−1,00	1.00 to 2.00	17,0−20,0	8,00−11,00	-	-	-	-	-	-	-	-	-	-	0,030	0,035
		12H18N9TL	58561			Not more than 0.12	0,20−1,00	1.00 to 2.00	17,0−20,0	8,00−11,00	-	-	-	From (5хС) to 0.70	-	-	-	-	-	-	0,030	0,035
		10KH18N11BL	-			Not more than 0.10	0,20−1,00	1.00 to 2.00	17,0−20,0	8,00−12,00	-	-	-	-	0,45−0,90	-	-	-	-	-	0,030	0,035
		07KH17N16TL	-			0,04−0,10	0,20−0,60	1.00 to 2.00	16,0−18,0	15,00−17,00	-	-	-	Of 0.005−0,150	-	-	-	-	-	-	0,020	0,035
		12H18N12M3TL	-			Not more than 0.12	0,20−1,00	1.00 to 2.00	16,0−19,0	11,00−13,00	3,00−4,00	-	-	From (5хС) to 0.70	-	-	-	-	-	-	0,030	0,035
		55KH18G14S2TL	-			0,45−0,65	1,50−2,50	12,00−16,00	16,0−19,0	-	-	-	-	0,10−0,30	-	-	-	-	-	-	0,030	0,040
		15KH23N18L	-			0,10−0,20	0,20−1,00	1.00 to 2.00	22,0−25,0	17,00−20,00	-	-	-	-	-	-	-	-	-	-	0,030	0,030
		20KH25N19S2L	-			0.20	2,00−3,00	0,50−1,50	23,0−27,0	18,00−20,0	-	-	-	-	-	-	-	-	-	-	0,030	0,035
		18KH25N19SL	-			Not more than 0.18	0,80−2,00	0,70−1,50	22,0−26,0	17,00−21,00	-	-	-	-	-	-	-	-	-	-	0,030	0,035
		45KH17G13N3JUL	-			0,40−0,50	0,80−1,50	12,00−15,00	16,0−18,0	2,50−3,50	-	-	-	-	-	-	-	0,60−1,00	-	-	0,030	0,035
		35KH18N24S2L	-			0,30−0,40	2,00−3,00	Not more than 1.50	17,0−20,00	23,00−25,00	-	-	-	-	-	-	-	-	-	-	0,030	0,035
		31KH19N9MVBTL	-			0,26−0,35	Not more than 0,80	0,80−1,50	18,0−20,0	8,00−10,00	1,00−1,50	-	1,00−1,50	0,20−0,50	0,20−0,50	-	-	-	-	-	0,020	0,035
		12KH18N12BL	-			Not more than 0.12	Not more than 0.55	0,50−1,00	17,0−19,0	11,0−13,00	-	-	-	-	0,70−1,10	-	-	-	-	-	0,025	0,020
		08KH17N34V5T3JU2RL	-			Not more than 0.08	0,20−0,50	0,30−0,60	15,0−18,0	32,00−35,00	-	-	4,50−5,50	2,60−3,20	-	Not more than 0.05	-	1,70−2,10	-	Not more than 0.01	0,010	0,010
		15KH18N22V6M2RL	-			0,10−0,20	0,20−0,60	0,30−0,60	16,0−18,0	20,00−24,00	2,00−3,00	-	5,00−7,00	-	-	Not more than 0.01	-	-	-	-	0,030	0,035
		20KH21N46V8RL	-			0,10−0,25	0,20−0,80	0,30−0,80	19,0−22,0	43,00−48,00	-	-	7,00−9,00	-	-	Not more than 0.06	-	-	-	-	0,035	0,040
	41 1250	110G13L	-			0,90−1,50	0,30−1,00	11,50−15,00	No more than 1,00	No more than 1,00	-	-	-	-	-	-	-	-	-	-	0,050	0,120
		110G13KH2BRL	-			0,90−1,50	0,30−1,00	11,50−14,50	1,0−2,0	Not more than 0,50	-	-	-	-	0,08−0,12	0,001−0,006	-	-	-	-	0,050	0,120
		110G13FTL	-			0,90−1,30	0,40−0,90	11,50−14,50	-	-	-	0,10−0,30	-	0,01−0,05	-	-	-	-	-	-	0,050	0,120
		130G14KHMFAL	-			1,20−1,40	Not more than 0,60	12,50−15,00	1.0 to 1.5	No more than 1,00	0,20−0,30	0,08−0,12	-	-	-	-	0,025−0,050	-	-	-	0,050	0,070
		120G10FL	-			0,90−1,40	0,20−0,90	8,50−12,00	No more than 1,00	No more than 1,00	-	0,03−0,12	-	Not more than 0.15	Not more than 0.01	-	Not more than 0.03	-	Not more than 0.7	-	0,050	0,120
Martin Sitno	41 1260	85KH4M5F2V6L (Р6М5Л)	-			0,82−0,90	Not more than 0,50	Not more than 0,50	3,8−4,4	Not more than 0.40	4,80−5,30	1,70−2,10	5,50−6,50	-	-	-	-	-	-	-	0,025	0,030
		90KH4M4F2V6L (Р6М4Ф2Л)	-			0,85−0,95	0,20−0,40	0,40−0,70	For 3.0−4.0	-	3,00−4,00	2,00−2,60	5,00−7,00	-	-	-	-	-	-	-	0,040	0,040
Alloy steel with special properties used in the contractual legal relations between the member countries of the CMEA
Martin Sitno — ferrite- NY	41 1240	15KH14NL		58411		Not more than 0.15	Not more than 0,60	0,40−0,90	12,0−15,0	0,70−1,20	-	-	-	-	-	-	-	-	-	-	0,035	0,035
		08KH12N4GSML		58711		Not more than 0.08	No more than 1,00	Not bolee1,50	11,5−13,5	3,50−5,00	Not Bo- than 1,00	-	-	-	-	-	-	-	-	-	0,035	0,035
The superheater- nano- ferrite- NY	41 1240	12KH21N5G2SL		58451		Not more than 0.12	Not more than 1.50	Not more than 2,00	20,0−22,0	4,50−6,00	-	-	-	-	-	-	-	-	-	-	0,035	0,045
		12KH21N5G2STL		58461		Not more than 0.12	Not more than 1.50	Not more than 2,00	20,0−22,0	4,50−6,00	-	-	-	From (4khs) to 0.70	-	-	-	-	-	-	0,035	0,045
		12KH21N5G2SM2L		58761		Not more than 0.12	Not more than 1.50	Not more than 2,00	20,0−22,0	4,50−6,00	1,80−2,20	-	-	-	-	-	-	-	-	-	0,035	0,045
		12KH19N7G2SAL		58462		Not more than 0.12	Not more than 1.50	Not more than 2,00	18,0−20,0	6,00−8,00	-	-	-	-	-	-	0,10−0,20	-	-	-	0,040	0,040
		12KH21N5G2SAL		58463		Not more than 0.12	Not more than 1.50	Not more than 2,00	20,0−22,0	4,00−6,00	-	-	-	-	-	-	0,10−0,20	-	-	-	0,040	0,040
		07Х18Н10Г2С2 М2Л		58763		Not more than 0.07	Not more than 2,00	Not more than 2,00	17,0−19,0	9,00−12,00	2,00−2,50	-	-	-	-	-	-	-	-	-	0,040	0,040
		15Х18Н10Г2С2 М2Л		58764		Not more than 0.15	Not more than 2,00	Not more than 2,00	17,0−19,0	9,00−12,00	2,00−2,50	-	-	-	-	-	-	-	-	-	0,040	0,040
		15Х18Н10Г2С2 М2ТЛ		58765		Not more than 0.15	Not more than 2,00	Not more than 2,00	17,0−19,0	9,00−12,00	2,00−2,50	-	-	From 5x x (C-0.03) 0.80	-	-	-	-	-	-	0,040	0,040

Notes:

1. The presence of elements of non-alloying, their allowable content and the need for control set in the design documentation and (or) NTD.

2. In steel brand 20KH5ML molybdenum may be replaced by titanium in an amount of not more than 0.1% at the condition of the parts at a temperature not exceeding 425 °C.

3. In steel brand 10KH18N9L if necessary, provide greater resistance to intergranular corrosion, the carbon content can be set to not more than 0.07%.

4. In steel brand 20KH13L allowed when melting in induction furnaces the increase of the mass fraction of sulfur up to 0,030%.

5. In steel brand 12KH18N12BL total mass fraction of sulfur and phosphorus should not exceed 0,040%.

6. In steel grades 12KH21N5G2STL and 15KH18N10G2S2M2TL allowed for stabilization is to use titanium niobium with tantalum in an amount of from (8хС) to 1.20%.

7. In steel grades 08KH17N34V5T3JU2RL, 15KH18N22V6M2RL, 20KH21N46V8RL content and the need to control boron and cerium is set to CD, and NTD.


Examples of symbols of steels:

25L GOST 977−88

23KHGS2MFL GOST 977−88

20KH25N19S2L GOST 977−88

Examples of symbols of steels for castings intended for products to be approved representative of the customer:

25L K20 GOST 977−88

23KHGS2MFL CT 110 GOST 977−88

In the designation of steel grades the first numbers indicate the average or the maximum (no lower limit) mass fraction of carbon in hundredths of percent; the letters behind the numbers mean: A — nitrogen, B is niobium, the tungsten, G — manganese, D — copper, M — molybdenum, N — Nickel, P — boron, — silicon, T — Titan, f — vanadium, X — chrome, Yu — aluminum, L — foundry. The figures after the letters indicate the approximate mass fraction of alloying elements in percent.

The indices «K» and «KT» are the symbols of categories of strength, followed by a number means the value of the required yield strength. The index «K» is assigned to the material in the annealed, normalized or tempered condition; the index «K» — after quenching and tempering.

1.4. The allowable deviation of alloying elements from the rules of the chemical composition given in table.1, must not exceed the values given in table.3.

Table 3

Chemical element	Mass fraction of element, %	Tolerance, %
		for the lower limit of the content of	for the upper limit content
Carbon	To 0.25	-0,02	+0,01
	SV. 0.25 and 0.50	-0,03	+0,02
	SV. 0,50	-0,04	+0,03
Silicon	To 0.50	-0,05	+0,10
	SV. Of 0.50 to 0.90	-0,08	+0,15
	SV. Of 0.90 to 1.30	-0,15	+0,20
	SV. 1,30	-0,15	+0,25
Manganese	To 0.50	-0,07	+0,10
	SV. Of 0.50 to 0.90	-0,10	+0,18
	SV. 0,90	-0,12	+0,25
Chrome	To 1.00	-0,07	+0,10
	SV. Of 1.00 to 2.00	-0,10	+0,15
	SV. Of 2.00	-0,15	+0,20
Nickel	To 1.00	-0,10	+0,15
	SV. Of 1.00 to 2.00	-0,15	+0,20
	SV. Of 2.00	-0,20	+0,25
Molybdenum	To 0.20	-0,03	+0,03
	SV. 0,20	-0,05	+0,05
Vanadium	To 0.20	-0,03	+0,03
	SV. 0,20	-0,05	+0,05
Copper	All content of the element	-0,10	+0,10
Titan	All content of the element	-0,02	+0,02
Aluminium	All content of the element	-0,01	+0,01

Mass fraction of sulfur and phosphorus in non-alloy structural steels up to 01.01.92 must meet the requirements specified in table.4, with 01.01.92 — indicated in the table.4A.

Table 4

Group casting	Mass fraction of impurities, %, max, steel
	main	sour	Converter	main	sour	Converter
	Sulfur			Phosphorus
1	0,050	0,060	0,060	0,050	0,060	0,080
2	0,045	0,060	0,050	0,040	0,060	0,070
3	0,045	0,050	-	0,040	0,050	-

Note. At customer’s request, the sulfur content in steels grades of 15L, 25L, 35L, 40L, 45L and 45FL should be no more than 0,040%.

Table 4A

Group casting	Mass fraction of impurities, %, max, steel
	main	sour	the basic open-hearth	main	sour	the basic open-hearth
	Sulfur			Phosphorus
1	0,040	0,060	0,050	0,040	0,060	0,050
2	0,035	0,060	0,045	0,035	0,060	0,040
3	0,030	0,050	0,045	0,030	0,050	0,040

The allowable deviation of alloying elements from the rules of the chemical composition given in table. 2, should not exceed the values given in table. 5.

Table 5

Chemical element	Mass fraction of element, %	Tolerance, %
		for the lower limit of the content of	for the upper limit of the content of
Carbon	To 0.12	-	+0,01
	SV. 0,12	-0,02	+0,02
Manganese	To 0.90	-0,10	+0,10
	SV. Of 0.90 to 8.00	-0,12	+0,20
	SV. 8,00	-0,50	+0,50
Silicon	To 0.90	-0,10	+0,10
	SV. 0,90	-0,10	+0,20
Chrome	To 5.00	-0,20	+0,20
	SV. Of 5.00 to 20.00	-0,50	+0,50
	SV. 20,00	-1,00	+1,00
Nickel	To 1.00	-0,10	+0,10
	SV. Of 1.00 to 2.00	-0,15	+0,10
	SV. Of 2.00 to 3.00	-0,20	+0,20
	SV. 3.00−6.00	-0,25	+0,20
	SV. 6,00	-0,50	+0,50
Molybdenum	All content of the element	-0,02	+0,02
Titan	To 0.50	-0,03	+0,03
	SV. Of 0.50 to 1.0	-0,05	+0,05
	SV. 1,0	-0,10	+0,10
Vanadium	All content of the element	-0,02	+0,03
Tungsten	All content of the element	-0,05	+0,05
Niobium	All content of the element	-0,02	+0,02
Copper	All content of the element	-0,1	+0,1

Notes:

1. For steel grade 85KH4M5F2V6L (Р6М5Л) permitted deviation in the mass fraction of vanadium of ±0.1%.

2. For steel grade 90KH4M4F2V6L (Р6М4Ф2Л) permitted deviation in the mass fraction of vanadium — minus 0.2, plus 0.1 percent.

2. BASIC PARAMETERS AND DIMENSIONS

2.1. Depending on the purpose and requirements of the detail castings are divided into three groups in accordance with table.6.

Table 6

Group casting	Appointment	Castings feature	The list of controlled quality indicators
1	Casting for General purpose	Casting for parts, the configuration and dimensions of which are determined only by the design and technological considerations	Appearance, dimensions, chemical composition
2	Castings for critical applications	Casting for the parts count on the durability and operating at static loads	Appearance, size, chemical composition, mechanical properties; yield strength or ultimate tensile strength and elongation
3	Casting a particularly critical applications	Casting for the parts count on the durability and operating under cyclic and dynamic loads	Appearance, size, chemical composition, mechanical properties; yield strength or tensile strength, elongation and toughness

Notes:

1. If necessary, the introduction of additional indicators not covered by the table.6 for this group of castings, their availability and the relevant provisions should be specified in the design documentation and (or) NTD.

At the request of the consumer, the number of additional controllable parameters may be included: hardness, fracture of metals, mechanical properties for castings with wall thickness over 100 mm mechanical properties at low and elevated temperatures, impermeability, microstructure, density, corrosion resistance, heat resistance, resistance against intergranular corrosion and others.

Casting of the 3rd group intended for products to be approved representative of the customer, operate at lower temperatures and subjected to dynamic loads, when specified in the design documentation and (or) NTD toughness of steel is determined at a temperature of minus 50 °C. the norms of toughness at this point in the design documentation and (or) NTD for specific products.

2. The possibility of establishing as a normalized measure of the relative narrowing of elongation is indicated in the design documentation and (or) NTD.

3. The possibility of increasing norms of strength with a corresponding reduction in the rate of plasticity and viscosity of the point in the design documentation and (or) NTD.

4. Standards, the possibility of reducing the level of mechanical properties on specimens cut from castings shall be indicated in KD.

5. Casting the 2nd and 3rd group intended for products to be approved representative of the customer, to replace the controlled measure of «yield strength» «tensile strength» is allowed only at the request of the customer.


Marking of castings in technical drawing requirements:

Casting the 1st group:

1 castings group GOST 977−88

Casting the 2nd group:

Casting the 2nd group GOST 977−88

Casting of the 3rd group:

Casting of the 3rd group of GOST 977−88

2.2. Group casting, steel grade, additional controllable parameters and requirements indicated in KD and (or) NTD. When flow-mass production, division of casting in groups produce a list of controlled indicators point to the drawing of the casting.

3. TECHNICAL REQUIREMENTS

3.1. Castings made in accordance with the requirements of this standard, KD and (or) NTD, approved in the established procedure.

3.2. Castings should be heat treated. The recommended modes of heat treatment of structural non-alloy and alloy steels given in Annex 3, alloy steel with special properties — in Appendix 4.

By agreement between manufacturer and consumer is allowed to produce heat treatment of castings 1 group of structural non-alloy and alloy steels and castings, 1st-3rd groups of alloy steels with special properties while providing mechanical and special properties of steel the steelmaking and shaping.

The number of allowed full heat treatments of the castings should not be more than three, and castings of austenitic and austenitic-ferritic alloy steels with special properties — no more than two.

Note. The number of vacations or stabilizing annealing of the casting with test bars of the same batch after quenching or normalizing to obtain the desired mechanical properties is not restricted.

3.3. Mechanical properties of structural non-alloy and alloy steels for castings with the wall thickness up to 100 mm at room temperature after the final heat treatment must conform to the standards given in table.7, alloy steel with special properties — in table.8.

Table 7

Steel grade	Kate- goriya so on- ness	Pre- Affairs current honor, MPa	Time current company Tule- tion, MPa	The fre- cité Sal. - tion, %	The fre- cité Sal restriction- nie , %	Impact Naya elm- bone, kJ/m	Kate- goriya so on- ness	Pre- Affairs current honor MPa	Time current company Tule- tion, MPa	The fre- cité Sal. - tion, %	The fre- cité Sal restriction- nie , %	Impact Naya elm- bone, kJ/m
		Not less than						Not less than
	Normalization or normalization with the release of						Quenching and tempering
Structural steel non-alloy
15L	K20	196	392	24	35	491	-	-	-	-	-	-
20L	K20	216	412	22	35	491	-	-	-	-	-	-
25L	K20	235	441	19	30	392	КТ30	294	491	22	33	343
30L	K25	255	471	17	30	343	КТ30	294	491	17	30	343
35L	K25	275	491	15	25	343	КТ35	343	540	16	20	294
40L	K30	294	520	14	25	294	КТ35	343	540	14	20	Two hundred ninety four
45L	K30	314	540	12	20	294	КТ40	392	589	10	20	245
50L	K30	334	569	11	20	245	КТ40	392	736	14	20	294
Structural steel alloy
20GL	K25	275	540	18	25	491	КТ30	334	530	14	25	383
35GL	K30	294	540	12	20	294	КТ35	343	589	14	30	491
20GSL	K30	294	540	18	30	294	-	-	-	-	-	-
30GSL	K35	343	589	14	25	294	КТ40	392	638	14	30	491
20G1FL	K30	314	510	17	25	491	-	-	-	-	-	-
20FL	K30	294	491	18	35	491	-	-	-	-	-	-
30KHGSFL	K40	392	589	15	25	343	КТ60	589	785	14	25	441
45FL	K40	392	589	12	20	294	КТ50	491	687	12	20	294
32KH06L	-	-	-	-	-	-	КТ45	441	638	10	20	491
40KHL	-	-	-	-	-	-	КТ50	491	638	12	25	392
20HML	K25	245	441	18	30	294	-	-	-	-	-	-
20KHMFL	K25	275	491	16	35	294	-	-	-	-	-	-
20GNMFL	C50	491	589	15	33	491	КТ60	589	687	14	30	589
35HML	K40	392	589	12	20	294	КТ55	540	687	12	25	392
30KHNML	K55	540	687	12	20	294	КТ65	638	785	10	20	392
35HGSL	K35	343	589	14	25	294	КТ60	589	785	10	20	392
35NGML	-	-	-	-	-	-	КТ60	589	736	12	25	392
20DKHL	K40	392	491	12	30	294	КТ55	540	638	12	30	392
08GDNFL	K35	343	441	18	30	491	-	-	-	-	-	-
13KHNDFTL	K40	392	491	18	30	491	-	-	-	-	-	-
12DN2FL	K55	540	638	12	20	294	КТ65	638	785	12	25	392
12DKHN1MFL	K65	638	785	12	20	294	КТ75	735	981	10	20	294
23KHGS2MFL	-	-	-	-	-	-	КТ110	1079	1275	6	Twenty four	392
12KH7G3SL	-	-	-	-	-	-	КТ110	1079	1324	9	40	589
25KH2GNMFL	-	-	-	-	-	-	КТ50	491	638	12	30	589
25KH2GNMFL	-	-	-	-	-	-	КТ110	1079	1275	5	25	392
27KH5GSML	-	-	-	-	-	-	КТ120	1177	1472	5	20	392
30KH3S3GML	-	-	-	-	-	-	КТ150	1472	1766	4	15	196
03N12KH5M3TL	-	-	-	-	-	-	КТ130	1275	1324	8	45	491
03N12KH5M3TJUL	-	-	-	-	-	-	КТ145	1422	1472	8	35	294
Structural steel alloy used in legal relations between the member countries of the CMEA
15GL	K20	235	413	22	35	373	-	-	-	-	-	-
30GL	K30	334	579	20	25	206	КТ45	481	628	16	20	235
45GL	K30	334	579	14	25	285	КТ30	334	628	13	20	285
70GL	-	-	785	4	-	-	-	-	-	-	-	-
55SL	K30	334	687	10	-	-	КТ40	392	736	12	-	-
40G1, 5FL	-	-	-	-	-	-	КТ50	520	819	8	20	285
15KHL	K20	196	383	30	30	373	-	-	-	-	-	-
30KHL	K25	285	530	15	30	265	КТ40	432	677	15	30	402
25KHGL	-	-	-	-	-	-	КТ30	304	579	12	20	206
35KHGL	K30	334	628	14	25	137	КТ35	383	726	10	20	167
50KHGL	-	-	687	5	-	-	-	-	775	13	-	-
60KHGL	-	-	785	4	-	285	КТ30	338	628	13	20	285
70KH2GL	-	-	785	4	-	-	-	-	-	-	-	-
35KHGFL	K40	392	638	13	-	285	КТ50	491	687	15	-	383
40KHFL	K55	579	770	10	18	245	КТ90	883	1177	4	8	196
30KHML	K25	285	530	18	25	304	КТ30	334	677	14	25	265
40KHML	K30	334	628	14	25	206	КТ45	481	677	11	20	206
40KHNL	-	-	-	-	-	-	КТ45	481	672	12	25	383
40KHN2L	K35	373	638	15	25	285	КТ55	540	785	12	20	334
30KHG1, 5MFRL	K65	638	981	4	5	49	КТ95	932	1275	2	4	147
75KHNMFL	-	-	981	3	-	-	-	-	-	-	-	-
40GTL	K30	323	608	14	25	285	КТ40	422	726	10	20	334
20GNMJUL	K35	343	500	18	30	491	-	-	-	-	-	-

______________________

Characteristics of the mechanical properties obtained in the regime of heat treatment specified in table.11.

Table 8

The class began	Steel grade	Limit current honor, MPa		Temporary resistance tion, MPa	Take tional elongation, , %	Take significant narrowing ,%	Impact strength, kJ/m
		Not less than
Alloy steel with special properties
Martensitic	20KH5ML	392		589	16	30	392
	20KH8VL	392		589	16	30	392
	20Х1ЗЛ	441		589	16	40	392
	08KH14NDL	510		648	15	40	590
	09KH16N4BL	785		932	10	-	392
	09KH16N4BL	883		1128	8	-	245
	09KH17N3SL	736		981	8	15	196
	09KH17N3SL	736		932	8	20	245
	09KH17N3SL	638		834	6	10	-
	40KH9S2L	Are not standardized
	10KH12NDL	441		638	14	30	294
	20KH12VNMFL	491		589	15	30	294
Martensitic-ferritic	15KH13L	392		540	16	45	491
Ferritic	15KH25TL	275		441	-	-	-
Austenitic-martensitic	08KH15N4DML	589		736	17	45	981
	08KH14N7ML	687		981	10	25	294
	14KH18N4G4L	245		441	25	35	981
Austenitic-ferritic	12KH25N5TMFL	392		540	12	40	294
	35KH23N7SL	245		540	12	-	-
	40KH24N12SL	245		491	20	28	-
	20KH20N14S2L	245		491	20	25	-
	16KH18N12S4TJUL	245		491	15	30	275
	10KH18N3G3D2L	491		687	12	25	294
Austenitic	10KH18N9L	177		441	25	35	981
	12H18N9TL	196		441	25	32	590
	10KH18N11BL	196		441	25	35	590
	07KH17N16TL	196		441	40	55	392
	12H18N12M3TL	216		441	25	30	590
	55KH18G14S2TL	-		Six hundred thirty eight	6	-	147
	15KH23N18L	294		540	25	30	981
	20KH25N19S2L	245		491	25	28	-
	18KH25N19SL	245		491	25	28	-
	45KH17G13N3JUL	-		491	10	18	981
	15KH18N22V6M2RL	196		491	5	-	-
	08KH17N34V5T3JU2RL	687		785	3	3	-
	20KH21N46V8RL	-		441	6	8	294
	35KH18N24S2L	294		549	20	25	-
	31KH19N9MVBTL	294		540	12	-	294
	12KH18N12BL	196		392	13	18	196
	110G13KH2BRL	491		-	22	30	1962
	130G14KHMFAL	441		883	50	40	2453
Martensitic	85KH4M5F2V6L (Р6М5Л)	Not regulated
	90KH4M4F2V6L (Р6М4Ф2Л)	Not regulated
Alloy steel with special properties used in legal relations between the member countries of the CMEA
Martensitic-ferritic	15KH14NL		289	481	15	50	294
	15KH14NL		383	579	15	50	441
	08KH12N4GSML		549	736	15	35	540
Austenitic-ferritic	12KH21N5G2SL		343	549	22	20	590
	12KH21N5G2STL		343	549	12	10	196
	12KH21N5G2SM2L		343	549	22	20	590
	12KH19N7G2SAL		240	481	20	30	590
	12KH21N5G2SAL		334	657	18	20	245
	07KH18N10G2S2M2L		177	432	30	35	441
	15KH18N10G2S2M2L		216	432	30	35	785
	15KH18N10G2S2M2TL		196	432	20	-	-

________________
Characteristics of the mechanical properties obtained in the regime of heat treatment specified in table.12.

Note. Mechanical properties of steel 110G13L, 110G13FTL and 120G10FL established by agreement between manufacturer and consumer.

3.4. The configuration and dimensions of the castings shall conform to the drawings approved in the prescribed manner.

Dimensional tolerances and mass of castings and machining allowances must comply with the requirements of GOST 26645, forming slope — GOST 3212 or provided in CD.

3.5. Casting must be cleaned of sand, scale and penetration. Profit and feeders must be removed.

Designated sections of the feeders and profits, bays and perforation must be stripped or chopped off within tolerances according to the drawing of the casting.

Allowed by agreement between manufacturer and user to install in KD and (or) NTD the presence of metal penetration on the castings.

3.6. Removal of feeders and profits is carried out in any way.

Removal of feeders and profits sharp fire should be conducted before final heat treatment.

Removal of feeders and profits sharp fire after the final heat treatment must be specified in the design documentation and NTD.

3.7. To be machined surface of the casting is not permitted surface defects in the form of shells, junctions, utain, captivity, etc., exceeding in depth the allowance for machining.

On the treated surfaces of the castings are allowed shell does not affect the performance and strength of parts, dimensions and location of which are indicated in KD on the casting.

3.8. On machined surfaces of castings is permitted without the fix, sinks and other defects, except cracks, type, size, number and location of which are indicated in KD.

3.9. Allowed to repair casting defects that reduce the strength and serviceability of the castings, if so specified in the CD.

3.10. Upon correction of defects by welding it should be carried out before final heat treatment, unless otherwise indicated in KD and NTD.

The validity of the repair welding of defects discovered after final thermal and machining, as well as the need for and form of subsequent heat treatment of the castings indicated in KD and NTD.

3.11. Admissibility of discontinuities in the form of shells, porosity, etc., as well as their size, number and location of the point in CD, and NTD.

3.12. It is allowed to edit (fix the warping) of castings in cold and hot condition. The size of the edits, need holiday stress relief after straightening set in CD and NTD.

3.13. The need to verify bezoperatsionnogo layer of metal castings and its depth indicated in KD and NTD.

On the treated friction surfaces of castings and test the hardness of the allowance for machining should ensure the complete removal of bezoperatsionnogo layer.

3.14. Rules additional controlled parameters are established in the design documentation and (or) NTD.

3.15. Castings should be uncultivated on the surface of the stamp of the technical control of the manufacturer and marked in accordance with the requirements of the CD and NTD. Signs marking may be cast, printed or written indelible ink.

If you cannot marking and marking because of the configuration and dimensions of the casting shall have a tag with the marking and stamp of the technical control indicating the number of castings in the party. When flow-mass production of castings to label and stigmatize them necessary in accordance with the instructions in CD, and NTD.

4. ACCEPTANCE

4.1. Castings take parties. The party consists of casting one melting. In coordination with the consumer party is permitted to make of the casting of steel of the same brand one or more replaceable heats of melting, subjected to heat treatment in one or several batches according to the same regime with mandatory registration of automatic devices.

The casting, which cannot be thermally processed at the factory, a set of casting smelting one.

For castings intended for products to be approved representative of the customer, the party recruited from the casting, subjected to heat treatment.

When flow-mass production, in agreement with the consumer allowed to make a batch of castings has become one of the brand several heats, made one drawing produced on the same batch and subjected to heat treatment in the same conditions. In the document about the quality instead of the heat number specify the batch number.

In small-scale production at a steady technological process in agreement with the consumer allowed the compilation of a batch of castings of steel the same brand multiple trunks; by agreement between manufacturer and with the customer’s representative is allowed to make a lot of castings of steel the same brand multiple interchangeable heats of melting.

Allowed to make a lot of castings in the 1-St and 2-nd groups of similar configurations and sizes, made by different specifications of steel single bottoms, subjected to heat treatment in the same cage.

4.2. Acceptance of the stragglers from the party of castings, but also castings, are fixed by welding with subsequent heat treatment, carried out according to test results the main party, if the mode of heat treatment in both cases is the same and is confirmed by automatic recording devices or by results of tests of samples of other batches of the same grade steel, heat-treated simultaneously with stragglers castings.

4.3. The casting should be made a document about quality that contains:

trademark of the manufacturer;

the number of the drawing or casting;

the symbol of the casting;

the number and weight of castings;

batch number;

the room melt;

grade of steel;

the results of chemical analysis;

a heat treatment process;

the results of mechanical tests;

the results of additional testing;

the designation of this standard.

4.4. To verify compliance of the chemical composition of steel castings to the requirements specified in table.1 and 2, sampling is carried out according to GOST 7565 (sect.2).

Allowed verification of the conformity of the chemical composition of the steel casting to carry out for each cast.

Allowed to check the conformity of the chemical composition of structural non-alloy and alloy steel from one of the melting change in the established technological process, the constant charge and steelmaking of the same brand in furnaces having a capacity not exceeding 3 t — casting the 1st group, with a capacity of not more than 500 kg — casting the 2nd and 3rd groups.

When flow-mass production volume of the chemical composition control install on a CD and (or) NTD.

4.5. To control the conformity of the castings to the requirements of this standard establish acceptance, periodic and standard tests. The tests indicate that in CD and (or) NTD.

To check the compliance of indicators of mechanical properties of steel castings to the requirements of this standard for each batch of cast test bars in the quantity specified in the design documentation and (or) NTD on casting.

Allowed from the CD and (or) NTD to cast test bars from one or more heats of this change.

By agreement with the consumer allowed to test the mechanical properties of steel castings selected from each lot in accordance with the documentation and (or) NTD.

Verification of compliance of indicators of mechanical properties of steel castings required in this standard category strength the manufacturer holds for each batch of casting the 2nd and 3rd group.

Allowed to assess the mechanical properties of non-alloy structural steels by methods of mathematical statistics in accordance with the CD and NTD on casting and with the agreement of the representative of the customer receiving the products.

When flow-mass production control of mechanical properties of steel is carried out periodically on a CD and (or) NTD.

4.6. Mechanical properties of steel castings test on one specimen under a tensile test on two specimens, when tested for impact strength.

4.7. If unsatisfactory test results on at least one of characteristic values of mechanical properties for him to repeat the test at twice the number of samples taken from test bars or castings in the same batch, melting or casting and test bars subjected to repeated heat treatment and testing of all mechanical properties.

4.8. The consistent appearance of a casting drawing and requirements PP.3.5, 3.7−3.9 tested for each casting batch.

4.9. The size of the casting, subject to monitoring and inspection and sampling volume installing in CD and (or) NTD on casting.

4.10. The scope, frequency and methods of inspection of metal castings for compliance with the requirements of section 3.11 (magnetic and liquid penetrant testing, radiographic inspection x-ray or gamma rays, etc.) set in CD and NTD.

4.11. The scope and frequency of tests additional controllable parameters set in the design documentation and (or) NTD.

5. TEST METHODS

5.1. Control of chemical composition is carried out according to GOST 12344, 12345 GOST, GOST 12346, 12347 GOST, GOST 12348, 12349 GOST, GOST 12350, 12351 GOST, GOST 12352, 12354 series GOST, GOST 12355, 12356 GOST, GOST 12357, 12359 GOST, GOST 12360, 12361 GOST* GOST 28473, GOST 22536.0 to GOST 22536.5, GOST 22536.7−22536.12 GOST, GOST 22536.14 or other methods of ensuring the accuracy of the determination under specified standards.
_______________
* On the territory of the Russian Federation GOST 12361−2002. — Note the manufacturer’s database.

5.2. Samples for the determination of chemical composition of steel castings are selected in accordance with GOST 7565.

For steelmaking furnaces with a capacity of not more than 500 kg are allowed samples to determine the chemical composition of the select in the middle of casting melting and to use a sample mass of 200 g or more.

When casting one casting samples from melting is carried out after die-casting.

For the determination of chemical composition allowed to use a metal taken from the test bars for mechanical testing or from the casting.

The sample marked number smelting.

5.3. Determination of mechanical properties of metal castings is carried out on samples taken from the test bars, or, in the absence of test bars from castings.

Trial bruski it is recommended to take a piss in the middle of the pouring of each melt.

Note. At the request of the representative of the customer samples made from the castings.

5.4. The recommended configuration, the dimensions of the test bars and the scheme of cutting out of samples specified on the devil.1−6.

Damn.1

Damn.2

Damn.3

Damn.4

Damn.5

Damn.6

For castings intended for products to be approved by a customer representative, trial bars features.2, 4, 5 not made.

The position of samples for tensile tests and determination of the impact strength test bars reglamentary and drawings it is specified conditionally.

Type of test bar is set by the manufacturer.

When producing castings that require individual control of mechanical properties, it is possible to use the tidal test block, the size and location of which is set in the design documentation and (or) NTD. The location of the tidal bars in the casting intended for products to be approved representative of the customer, is installed by the manufacturer. The separation of tidal bars from the casting may be conducted after final heat treatment.

The conditions of preparing test bars and castings have to be the same. Test bars cut from them or workpiece to determine the mechanical properties must undergo a heat treatment together with the castings of the party.

Allowed to cast test bars in a sand mold (dry or raw), regardless of the method of manufacturing castings.

For thick-walled castings are allowed to cut the samples at a distance of not more than 30 mm from the outer surface of the casting.

5.5. The tensile test is carried out according to GOST 1497 on samples of type I-IV N 4.

Allowed to test the samples of type II-IV N 7.

5.6. Impact strength testing is carried out according to GOST 9454 on samples of type I.

5.7. The results of the tests of specimens having defects associated with castings (sinks, foreign inclusions, hot cracks, porosity, etc.), machining conditions or test conditions, are not taken into account. Defective are replaced with new samples taken from bars or castings.

5.8. Definition of hardness Brinell hardness — GOST 9012, determination of Rockwell hardness — GOST 9013.

5.9. Control the appearance of the castings is carried out on KD and (or) NTD.

5.10. Determination of the depth bezoperatsionnogo layer — according to GOST 1763.

5.11. Test for heat resistance — according to GOST 6130.

5.12. The test for resistance against intercrystalline corrosion according to GOST 6032*.
_______________
* On the territory of the Russian Federation GOST 6032−2003, here and hereafter. — Note the manufacturer’s database.

Note: test Methods steels not included in GOST 6032, set in the design documentation and (or) NTD.

5.13. Tensile test at elevated temperatures is carried out according to GOST 9651, low temperature — according to GOST 11150.

5.14. Test long-term strength — according to GOST 10145.

5.15. Test methods of special properties not mentioned in this standard must be specified in the design documentation and (or) NTD.

6. PACKING, TRANSPORTATION AND STORAGE

6.1. Rules on packaging, transport and storage of castings set in the design documentation and (or) NTD for casting.

ANNEX 1 (reference). THE SCOPE OF STRUCTURAL ALLOY STEEL

ANNEX 1
Reference

Table 9

Steel grade	Scope
20GL	Drives, sprockets, ring gears, drums, etc. parts, which are requirements for strength and toughness, working under static and dynamic loads
35GL	Drives, sprockets, ring gears, drums, sheaves, etc. heavily loaded parts of excavators, bearing caps, axles
20GSL	Body parts of hydraulic turbines, operating at temperatures up to 450 °C
30GSL	Gears, rollers, clips, ring gears, levers, flanges, pulleys, sectors, columns, wheels and other details
20G1FL	Frames, beams, housings and other parts of the cars
20FL	Castings cars, metallurgical and mining equipment
30KHGSFL	Castings excavators
45FL	Wear resistant castings for tractors and metallurgical equipment
32KH06L	Brackets, rockers, rollers and other critical parts with a wall thickness up to 50 mm and a total weight of parts up to 80 kg
40KHL	Details high tensile strength, as well as working on wear
20HML	Gear, crosses, bushings, gears, cylinders, cartridges and other body parts, operating at temperatures up to 500 °C
20KHMFL	The details of the fittings, body parts, cylinders, operating at temperatures up to 540 °C
20GNMFL	Welded construction with large cross sections, tyres, cement kilns
35HML	Gear, crosses, bushings, gears, furnace parts and other important parts, which are requirements of high strength and toughness, working under static and dynamic loads
30KHNML	Responsible loaded parts, which are requirements of high strength and sufficient toughness, working under static and dynamic loads at temperatures up to 400 °C
35HGSL	Gears, sprockets, axles, shafts, couplings, etc. important parts, which require increased durability
35NGML	Responsible loaded parts, which are requirements of high strength and sufficient toughness, working under static and dynamic loads
20DKHL	The same
08GDNFL	Welded construction, critical parts with a wall thickness up to 700 mm, requirements of high viscosity and of sufficient strength, operating at temperatures not more than 350 °C
13KHNDFTL	Welded construction, responsible loaded parts, which are requirements of sufficient strength and toughness, working under static and dynamic loads at temperatures up to 500 °C
12DN2FL	Welded construction, responsible loaded parts, which are requirements of sufficient strength and toughness, working under static and dynamic loads at temperatures up to 400 °C
12DKHN1MFL	Welded construction, responsible loaded parts, which are requirements of high strength and sufficient toughness, working under static and dynamic loads
23KHGS2MFL	Items for critical applications with wall thickness up to 30 mm, operating under cyclic and shock loads in conditions of impact-abrasive wear
12KH7G3SL	Responsible highly loaded parts with a wall thickness up to 100 mm, operating in conditions of static and dynamic loads
25KH2GNMFL	Items for critical applications with wall thickness up to 50 mm working under static and dynamic loads
27KH5GSML	Highly loaded parts for critical applications with wall thickness up to 50 mm, working in conditions of impact loads and impact-abrasive wear
30KH3S3GML	Highly loaded parts for critical applications with wall thickness up to 30 mm, which meet the requirement of high strength and sufficient viscosity
03N12KH5M3TL	Highly loaded parts of responsible destination, with a wall thickness up to 200 mm
03N12KH5M3TJUL	The same

ANNEX 2 (informative). APPLICATIONS ALLOY STEEL WITH SPECIAL PROPERTIES

ANNEX 2
Reference

Table 10

The class began	Steel grade	The main property	Scope
Alloy with special properties
Martensitic	20KH13L	Somewhat less corrosion resistant in atmospheric conditions compared with steel stamps 15KH13L	Parts that are exposed to impact loads (turbine blades, valves, hydraulic presses, valves cracking units, segments, nozzles, moulds for glass, the frame of the charging Windows, household items, etc.), as well as products that are exposed to relatively weak aggressive media (precipitation, wet steam, aqueous solutions of salts of organic acids at room temperature)
	08KH14NDL	Corrosion resistant in sea water and atmospheric conditions. Corrosion resistance higher than that of steel grades 15KH13L and 20KH13L	Parts, operating in sea water (propellers, and others)
	09KH16N4BL	Corrosion resistant. High strength at normal temperature, resistant to oxidation under atmospheric conditions at temperatures up to 500 °C	Details rugged for the aviation, chemical and other industries
	09KH17N3SL	Corrosion-resistant steel. High strength at normal temperature	Details rugged for the aviation, chemical and other industries, work in environments of medium aggressiveness (nitrogen and weak organic acids, solutions of salts of organic and inorganic acids)
	20KH5ML	Heat resistant in hot oil environments containing sulfur compounds. Heat resistance up to 600 °C	Details of reinforcement refineries installations, furnace doubles, pump housings, etc. parts, operating in oil environments under pressure at temperatures up to 550 °C
	20KH8VL	Heat-resistant to more aggressive sulfur environments compared to steel stamps 20KH5ML, heat resistance up to 600 °C	The same parts operating under conditions of highly sulfurous oil environments under pressure at temperatures up to 575 °C
	40KH9S2L	Heat-resistant at temperatures up to 800 °C, heat-resistant at temperatures up to 700 °C	Parts, operating a long time under load at temperatures up to 700 °C (the valves, motors, grates, fasteners)
	10KH12NDL	Kavitatsionnogo. Corrosion resistant and arationality in terms of running water, the Steel is not prone to temper brittleness, not placeofpublication	Elements of welded structures operating the turbines, details of the turbines (blades, wetted parts) operating under conditions of cavitation damage
	20KH12VNMFL	Corrosion resistant, heat resistant up to 650 °C	Cast turbine parts (cylinders, nozzles, diaphragms and valves) with a working temperature up to 600 °C
Martensitic — ferritic	15KH13L	Corrosion resistant in atmospheric conditions, in river and tap water. Higher corrosion resistance is achieved by heat treatment and polishing	Parts with high ductility, loads (turbine blades, valves, hydraulic presses, valves cracking units, and others), as well as products that are exposed to relatively weak aggressive media (precipitation, wet steam, aqueous solutions of salts of organic acids at room temperature)
Ferritic	15KH25TL	Corrosion-resistant, heat-resistant at temperatures up to 1100 °C, has a satisfactory resistance to intergranular corrosion	Details no are exposed to permanent and variable loads (equipment for fuming nitric or phosphoric acids), many of the details of chemical engineering, including those working in contact with urea, furnace fittings, plates and other
Austenitic — martensitic	08KH15N4DML	Corrosion resistant in sea water and atmospheric conditions. Compared to 08KH14NDL less sensitive to stress concentrators	Parts, operating in sea water (heavily loaded propellers of icebreakers, etc.)
	08KH14N7ML	Corrosion resistant	The details of the products working at room and low (down to minus 196 °C) temperatures
	14KH18N4G4L	Corrosion resistant. Is more than steel brand 10KH18N9L tendency to intergranular corrosion	Fittings for chemical industry, manifolds, exhaust systems, part, furnace fittings etc.
Austenitic — ferritic	12KH25N5TMFL	Corrosion-resistant, heat-resistant at temperatures up to 600 °C	Fittings, chemical industry, aviation parts and other industries, as well as parts, operating under high pressure up to 300 bar (30 MPa)
	16KH18N12S4TJUL	Corrosion resistant	Welded products operating in aggressive environments, in particular concentrated nitric acid at a temperature of 105 °C
	35KH23N7SL	Corrosion-resistant in sulphurous environments, heat-resistant at temperatures up to 1000 °C	Details of kilns of refineries and other details, operating at temperatures up to 1000 °C. instead of the Recommended steel grade 40KH24N12SL
	40KH24N12SL	Corrosion-resistant, heat-resistant at temperatures up to 1000 °C, heat-resistant	Parts, operating at high temperature and pressure (the blades of the compressor and nozzle apparatus, furnace conveyors, screws, fasteners and others)
	20KH20N14S2L	Heat-resistant steel to 1000−1050 °C, resistant to carburizing environment	Furnace conveyors, augers for carburizing and other parts, operating at high temperatures under load
	10KH18N3G3D2L	Kavitatsionnogo, has a high resistance to sand erosion in comparison with steel stamps 10KH12NDL	Alloy blade and welded parts of the working parts of hydraulic turbines, operating at pressures not exceeding 80 l/h cross sections up to 300 mm
Austenitic	10KH18N9L	Corrosion resistant, heat resistant up to 750 °C. Not resistant in sulphurous environments. When the content of carbon in steel is not more than 0.07% resistant against intergranular corrosion	Fittings for chemical industry, manifolds, exhaust systems, part, furnace fittings, plates for etching and baskets and other details, operating at temperatures up to 400 °C
	12H18N9TL	Corrosion resistant, heat resistant up to 750 °C, heat-resistant at temperatures up to 600 °C. Has a high resistance against gas and intergranular corrosion	Fittings for chemical industry, manifolds, exhaust systems, part, furnace fittings, boxes and covers for pickling baskets and other items
	10KH18N11BL	Corrosion-resistant, heat-resistant at temperatures up to 800 °C. not sensitive to intergranular corrosion	The same components and parts of gas turbines for various purposes, components of turbochargers operating at low loads. Details of units of cellulose, nitrogen, food processing and soap industry
	07KH17N16TL	Corrosion resistant. Has a low magnetic susceptibility, high resistance against gas and intergranular corrosion, good machinability	Cast fittings for critical applications, and requirements for low magnetic susceptibility, high corrosion resistance and good machinability
	12H18N12M3TL	Corrosion resistant, heat resistant, not susceptible to intergranular corrosion at temperatures up to 800 °C	Details stable when exposed to boiling sulfurous, phosphoric, formic, acetic and other acids, as well as details for a long period of time operating under load at temperatures up to 800 °C
	55KH18G14S2TL	Corrosion resistant steel, heat-resistant to a temperature of 950 °C. In an environment of sulphurous acid is unstable	The same parts are made from steel grade 40KH24N12SL
	15KH23N18L	Heat resistant up to 900 °C. At a temperature of 600−800 °C is prone to embrittlement due to the formation of Sigma phase	Details of installations for the chemical, oil and automotive industries, gas pipelines, combustion chamber nozzle apparatus. Details of the kiln fittings that do not require high mechanical strength (can be used for heating elements resistance)
	20KH25N19S2L	Corrosion-resistant, heat-resistant at temperatures up to 1100 °C	The retort annealing furnaces and parts boxes for carburizing
	18KH25N19SL	Corrosion resistant, acid resistant, heat resistant	Details of steam and gas turbines, boilers, blades and shrouds of the nozzle compressors and turbines and other parts, operating at high temperatures
	45KH17G13N3JUL	Corrosion resistant, resistant to corrosion in sulfur environments. Heat-resistant at temperatures up to 900 °C, heat-resistant	Details of the holiday, hardening and carburizing furnaces, hearth stoves, boxes, crucibles for salt baths and other parts, operating at high temperatures. Recommended as a substitute for steel 40KH24N12SL
	35KH18N24S2L	Corrosion-resistant, heat-resistant at temperatures up to 1100−1200 °C, heat-resistant	Parts, operating at high temperatures in siliconarmenia condition (furnace conveyors, screws, fasteners)
	31KH19N9MVBTL	High-temperature steel	The impellers of the turbine of the turbochargers, turbine and guide vanes
	12KH18N12BL	Corrosion resistant, heat resistant up to 650 °C	Castings power plants with long-term operation at 600−650 °C and limited at 700 °C
	08KH17N34V5T3JU2RL	Heat-resistant at temperatures up to 1000 °C	Nozzle and working blades of gas turbines, solid rotors and other parts, operating at temperatures up to 800 °C
	15KH18N22V6M2RL	Heat-resistant at temperatures up to 1000 °C, heat-resistant at temperatures up to 800 °C	Engine components for aviation industry (working and nozzle blades of gas turbines, and others)
	20KH21N46V8RL	Heat-resistant at temperatures up to 1000 °C, heat-resistant at temperatures up to 800 °C.	Engine components for aviation industry (working and nozzle blades of gas turbines, and others)
	110G13L	High resistance to deterioration when exposed to high pressures or shock loads	Housing vortex and ball mills, crushers cheeks, tram and railroad crossings and frogs, caterpillar tracks, sprockets, teeth of excavator buckets and other parts, operating at the shock wear
	110G13FTL	High resistance to shock-abrasive wear, high cold resistance	Housing vortex and ball mills, crushers cheeks, tram and railroad crossings and frogs, caterpillar tracks, sprockets, teeth of excavator buckets and other parts, operating at impact wear, parts of metallurgical and mining equipment
	130G14KHMFAL	High resistance to deterioration when exposed to high pressures or shock loads. High resistance against abrasive wear, high cold resistance. Retains high impact strength at hardened state (in the process of operation of parts)	Housing vortex and ball mills, crushers cheeks, tram and railroad crossings and frogs, caterpillar tracks, sprockets, teeth of excavator buckets and other parts, operating at the shock wear
	120G10FL	High resistance to abrasive wear	The track links of tractors and other parts operating under conditions of abrasive wear
	110G13KH2BRL	High resistance to deterioration when exposed to high pressures or shock loads	For special production
Martensitic	85KH4M5F2V6L (Р6М5Л)	High durability, heat resistant	Cast billets tool obtained later by hot plastic deformation (forging, hot extrusion) and die-cast metal-cutting tools (used for casting the 1st group)
	90KH4M4F2V6L (Р6М4Ф2Л)	High durability, heat resistant	The same
Alloy with special properties, used in legal relations between the countries — members of CMEA
Martensitic- ferritic	15KH14NL	Corrosion resistant in water, wet steam, dilute nitric acid and weak organic acids. Increased resistance against cavitation	Apply in legal relations
	08KH12N4GSML	Corrosion resistant in water, wet steam, dilute nitric acid and weak organic acids	The same
Austenitic — ferritic	12KH21N5G2SL	Corrosion in air, nitric acid, very dilute sulfuric acid and dilute or weak organic acids	Apply in legal relations
	12KH21N5G2STL	Corrosion in air, nitric acid, very dilute sulfuric acid and dilute or weak organic acids, more resistant to intergranular corrosion than steel 10KH18N9L	The same
	12KH21N5G2SM2L	Corrosion resistant in a number of inorganic and organic acids	«
	12KH19N7G2SAL	Corrosion in air, nitric acid, very dilute sulfuric acid and dilute or weak organic acids	«
	12KH21N5G2SAL	Corrosion in air, nitric acid, very dilute sulfuric acid and dilute or weak organic acids	«
	07KH18N10G2S2M2L	Corrosion resistant in a number of inorganic and organic acids, more resistant to intergranular corrosion than steel of the brand 15KH18N10G2S2M2L	«
	15KH18N10G2S2M2L	Corrosion resistant in a number of inorganic and organic acids	«
	15KH18N10G2S2M2TL	Corrosion resistant in a number of inorganic and organic acids, more resistant to intergranular corrosion than steel of the brand 15KH18N10G2S2M2L	«

APPENDIX 3 (recommended). THE HEAT TREATMENT OF STRUCTURAL NON-ALLOY AND ALLOY STEEL

APPENDIX 3
Recommended

Table 11

Steel grade	The mode of heat treatment
	Normalized and tempered		Quenching and tempering
	Normalization	Vacation	Hardening			Vacation
	Temperature, °C
15L	910−930 or	-		-	-
	910−930	670−690		-	-
20L	880−900 or	-		-	-
	880−900	630−650		-	-
25L	880−900	610−630		870−890	610−630
30L	880−900	610−630		860−880	610−630
35L	860−880	600−630		860−880	600−630
40L	860−880	600−630		860−880	600−630
45L	860−880	600−630		860−880	600−630
50L	860−880	600−630		860−880	600−630
20GL	880−900	600−650		870−890	620−650
35GL	880−900	600−650		850−860	600−650
20GSL	870−890	570−600		-	-
30GSL	870−890	570−600		920−950	570−650
20G1FL	930−970	600−650		-	-
20FL	920−960	600−650		-	-
30KHGSFL	900−930	600−650		900−920	630−670
45FL	880−920	600−650		880−920	600−650
32KH06L	-	-		890−910	620−660
40KHL	-	-		850−870	600−650
20HML	880−890	600−650		-	-
20KHMFL	970−1000 and 960−980	710−740		-	-
20GNMFL	910−930	600−650		910−930	640−660
35HML	860−880	600−650		860−870	600−650
30KHNML	860−880	600−650		860−870	600−650
35HGSL	870−890	570−600		870−880	630−670
35NGML	-	-		860−880	600−650
20DKHL	880−890	560−600		880−890	560−600
08GDNFL	920−950 or	-		-	-
	920−950	590−650		-	-
13KHNDFTL	950−970 or	-		-	-
	900−920	530−560		-	-
12DN2FL	910−930	530−560 or		-	-
	Pre-treatment			Final processing
	940−950	-		890−910	560−600
12DKHN1MFL	940−960 or	-		-	-
	890−910	520−630		890−910	520−630
23KHGS2MFL	Pre-treatment			Final processing
	1000−1040	720−740		1000−1020	180−220
12KH7G3SL	Pre-treatment			Final processing
	940−960	650−720		880−900	200−250
25KH2GNMFL	Pre-treatment			Final processing
	900−950	650−700		880−920	630−700
25KH2GNMFL	Pre-treatment			Final processing
	900−950	660−680		900−950	260−300
27KH5GSML	Pre-treatment			Final processing
	970−990	700−720		980−1000	200−220
30KH3S3GML	Pre-treatment			Final processing
	970−990	700−720		980−1000	200−220
Structural steel alloy used in legal relations between the countries — members of CMEA
15GL	900−920	550−650		-	-
30GL	860−890	550−650		840−860	570−610
45GL	870−890	570−600		840−860	600−650
70GL	790−820	580−650		-	-
55SL	840−880	650−720		820−850	650−720
40G1, 5FL	-	-		860−870	640−660
15KHL	900−930	550−650		-	-
30KHL	900−920	550−650		890−910	620−660
25KHGL	-	-		860−890	500−680
35KHGL	850−880	550−650		840−860	500−680
50KHGL	820−850	620−650		830−850	620−650
60KHGL	850−890	630−680		-	-
70KH2GL	820−860	630−680		-	-
35KHGFL	850−890	700−740		840−880	700−740
40KHFL	870−890	500−520		870−890	500−520
30KHML	850−890	550−650		840−870	530−670
40KHML	850−880	550−650		830−860	530−670
40KHNL	860−900	550−650		830−870	550−650
40KHN2L	860−900	550−650		830−870	550−650
30KHG1, 5MFRL	910−960	-		870−890	220−280
40GTL	870−920	620−660		680−880	620−660
75KHNMFL	840−870	630−670		-	-
20GNMJUL	880−920	600−700		-	-

________________
The heat treatment, providing the level of mechanical properties specified in table.7.
Notes:

1. For steel grade 40KHFL allowed to use vacation after normalization.

2. For steel grade 23KHGS2MFL shows the modes of preliminary heat treatment may be replaced by quenching and tempering, annealing or tempering.

3. For steel grades 03N12KH5M3TL and 03N12KH5M3TJUL it is recommended to apply heat treatment by mode: homogenization at a temperature 1180−1200 °C, quenching from 1000 °C; aging at a temperature of 500 °C.