GOST 25054-81

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  ГОСТ 25054-81

GOST 25054−81 forgings of corrosion-resistant steels and alloys. General technical conditions (Changes No. 1−4)

GOST 25054−81
Group B03

INTERSTATE STANDARD

FORGINGS OF CORROSION-RESISTANT STEELS AND SPLAVA

General specifications

Forgings of corrosion-resistant steels and alloys.
General specifications

OKP 08 9380

Date of introduction 1983−01−01

Resolution of the USSR State Committee on standards of 21 December 1981 N 5513 date of introduction is established 01.01.83

Limitation of actions taken by Protocol No. 2−92 of the Interstate Council for standardization, Metrology and certification (ICS 2−93)

EDITION with Amendments No. 1, 2, 3, 4, approved in March 1986, may 1987, March 1989, April 1990 (IUS 6−86, 8−87, 6−89, 7−90).


This standard applies to forgings with a diameter (thickness) of 1000 mm, manufactured by forging and hot forging from corrosion-resistant steel and alloy grades 20X13, 09KH16N4B, 07KH16N4B, 20KH17N2, 30CH13, 12H13, 14KH17N2, 08KH13, 07KH16N6, 08KH17N5M3, 08KH18G8N2T, 15KH18N12S4TJU, 08KH21N6M2T, 08KH22N6T, 10KH14G14N4T, 10X17H13M2T, 10H17N13M3T, 03KH17N14M3, 08KH17N15M3T, 12H18N9, 12KH18N9T, 04KH18N10, 08KH18N10T, 12KH18N10T, 03Х18Н11, 03KH21N21M4GB, 10Х23Н18, KHN65MV, KHN78T, 06HN28MDT, KHN32T intended for products of mechanical engineering.

(Changed edition, Rev. N 1).

1. CLASSIFICATION

1.1. Forgings depending on destination are divided into the groups listed in the table.1.

Table 1

Group of forgings	Applicability
I	For details, the dimensions of which are accepted for design reasons (not based on strength) and not exposed to environment that causes intergranular corrosion
II	For lightly loaded parts that have a margin of safety than the design, and not exposed to environment that causes intergranular corrosion
C	For lightly loaded parts that have a margin of safety than the design, and which are exposed to the environment, causing intergranular corrosion
III	For lightly loaded parts that have a margin of safety than the design, and not exposed to environment that causes intergranular corrosion
C	For lightly loaded parts that have a margin of safety than the design, and which are exposed to the environment, causing intergranular corrosion
IV	For the manufacture of parts operating under conditions of complex stress state or subjected to dynamic influences and not exposed to environment that causes intergranular corrosion
IVК	For the manufacture of parts operating under conditions of complex stress condition or exposed to dynamic loads and environmental conditions that causes intercrystalline corrosion
V	For the manufacture of critical parts operating in conditions of complex stress state or subjected to dynamic influences and not exposed to environment that causes intergranular corrosion
V	For the manufacture of critical parts operating in conditions of complex stress condition or exposed to dynamic loads and environmental conditions that causes intercrystalline corrosion

1.2. Marking forgings shall consist of a group number, designation of the steel grade or alloy designation of the present standard.

Forging groups II, C, III, C after the steel grade or alloy optionally specify values hardness Brinell.

Forging groups IV, IVК, V, V with mechanical properties different from those given in table.2 of this standard, the designation after the grade of steel or alloy additionally indicate the values of the mechanical properties other than those described in this standard.

(Introduced later. Izm. N 1).

Examples of symbols

Forging group I of steel grade 08KH22N6T:

Gr. I 08KH22N6T GOST 25054−81

The same group III of steel grade 08KH22N6T hardness 140−200 HB:

Gr. III 08KH22N6T 140−200 HB GOST 25054−81

The same group V of steel grade 08KH22N6T with yield strength of 350 MPa, elongation 20% and impact strength of 0.8 MJ/m:

Gr. V 08KH22N6T — 350 MPa — 20% — KCU0,8 MJ/mGOST 25054−81

(Changed edition, Rev. N 1, 2).

2. TECHNICAL REQUIREMENTS

2.1. Forgings shall be manufactured in accordance with the requirements of this standard, standards or technical specifications working drawings for specific forgings made in accordance with GOST 3.1126−88.

The dimensions of the forgings must consider the machining allowances, tolerances on dimensions and technological overlaps established by agreement between manufacturer and consumer.

(Changed edition, Rev. N 3, 4).

2.2. On the surface of the forgings should not be mechanical damages and defects that reduce the strength, serviceability and detract from the appearance.

On the surface of the forgings undergoing machining, are not allowed defects exceeding the depth of 50% of the unilateral allowance for machining for forgings manufactured by stamping, and 75% for forgings, forging produced.

Allowed to NTD on forgings to establish requirements for surface defects with a depth greater than the allowance for machining, the requirements for their correction and control of fixed seats.

(Changed edition, Rev. N 2, 3).

2.3. On uncultivated surfaces of the forging surface defects, except for some dents from scale and nicks should be removed by gentle cutting and Stripping, the depth of which should not display the sizes of forgings for maximum deviations on the drawing.

Allowed to NTD on forgings to set higher requirements for the quality of machined surfaces of forgings.

2.4. Forgings should not have placenow, shrinkage looseness, cracks. Allowed to NTD on forgings to set the size, number and location of defects allowed.

2.5. Allowed to NTD on forgings to establish the need and method of cleaning from scale.

2.6. Mechanical properties of metal forgings with a diameter (thickness) up to 600 mm inclusive, groups IV, IVК, V, V after final heat treatment, a certain longitudinal samples, and the hardness of all groups, except group I must conform to table.2.

Table 2

		Mechanical properties at +20 °C, not less
				Elongation , %			The relative narrowing , %			The impact strength KCU, j/mx10(kgf·m/cm)
				when the diameter (thickness) forgings and solid section, mm
The class began	Steel grade	Yield strength, MPa (kgf/mm)	Limit etc- ness , MPa (kgf/mm)	up to 200	over 200 up to 500	over 500 up to 1000	up to 200	over 200 up to 500	over 500 up to 1000	up to 200	over 200 up to 500	over 500 up to 1000	The hardness of BRI- Nelly (on top of- ness forgings), not more
Martin Sitno	20X13	441 (45)	647 (66)	16	15	14	50	45	40	64 (6,5)	49 (5,0)	39 (4,0)	197−248
	30X13	588 (60)	735 (75)	12	11	10	40	38	35	39 (4,0)	34 (3,5)	29 (3,0)	235−277
	09KH16N4B	784 (80)	931 (95)	8	7	7	42	38	35	59 (6,0)	54 (5,5)	49 (5,0)	269−302
	07KH16N4B	690 (70)	882 (90)	14	12	11	55	45	40	88 (9,0)	69 (7,0)	59 (6,0)	269−302
	20KH17N2	666 (68)	813 (83)	15	13	12	40	35	30	59 (6,0)	54 (5,5)	49 (5,0)	248−293
Martin Sitno — ferrite- NY	12H13	392 (40)	617 (63)	18	16	15	50	44	40	74 (7,5)	59 (6,0)	49 (5,0)	187−229
	14KH17N2	539 (55)	686 (70)	15	13	12	40	35	30	59 (6,0)	54 (5,5)	49 (5,0)	248−293
Ferrite- NY	08KH13	392 (40)	539 (55)	17	16	14	50	40	35	83 (8,5)	69 (7,0)	49 (5,0)	187−229
The superheater- nano — Martin- Sitno	07KH16N6	980 (100)	1176 (120)	13	12	12	50	50	50	69 (7,0)	69 (7,0)	69 (7,0)	341−415
	08KH17N5M3	833 (85)	1176 (120)	15	13	10	40	38	35	69 (7,0)	59 (6,0)	39 (4,0)	341−415
The superheater- nite ferry — nice	15Х18Н12СЧТЮ	382 (39)	715 (73)	In agreement
	08KH18G8N2T	265 (27)	588 (60)	In agreement
	08KH21N6M2T	343 (35)	539 (55)	22	18	18	40	37	35	78 (8,0)	59 (6,0)	39 (4,0)	140−200
	08KH22N6T	343 (35)	539 (55)	20	19	18	40	37	35	78 (8,0)	59 (6,0)	39 (4,0)	140−200
The superheater- magnetic	12X18H9T	196 (20)	510 (52)	40	37	35	48	44	40	-	-	-	170
	04KH18N10	157 (16)	441 (45)	40	39	38	50	47	45	-	-	-	179
	08X18H10	196 (20)	470 (48)	40	39	38	50	47	45	-	-	-	170
	08KH18N10T	196 (20)	490 (50)	38	36	35	52	46	40	-	-	-	179
	12KH18N10T	196 (20)	510 (52)	38	36	35	52	46	40	-	-	-	179
	03Х18Н11	176 (18)	441 (45)	40	40	40	55	48	45	-	-	-	179
	10KH14G14N4T	245 (25)	637 (65)	In agreement
	10X17H13M2T	196 (20)	510 (52)	38	36	30	50	47	45	-	-	-	200
	10H17N13M3T	196 (20)	510 (52)	38	36	30	50	45	40	-	-	-	200
	03KH17N14M3	176 (18)	470 (48)	40	38	35	55	48	45	-	-	-	179
	08KH17N15M3T	196 (20)	490 (50)	38	36	30	50	45	40	-	-	-	200
	12KH18N9	196 (20)	490 (50)	40	37	35	48	44	40	-	-	-	179
	03KH21N21M4GB	215 (22)	490 (50)	In agreement
	10Х23Н18	196 (20)	490 (50)	35	32	30	47	43	40	-	-	-	179
Alloy on Nickel- howling based	KHN65MV	294 (30)	735 (75)	35	32	30	40	37	35	-	-	-	220
	KHN78T	196 (20)	588 (60)	30	27	25	40	37	35	-	-	-	200
The alloy on the iron — Nickel- howling based	06HN28MDT	216 (22)	510 (52)	36	33	30	40	35	30	-	-	-	200
	KHN32T	176 (18)	470 (48)	36	33	30	40	37	35	-	-	-	-

Forging groups IV and IVК hardness value acceptance sign is not.

For determining the mechanical properties of forgings in the transverse, tangential or radial samples allowed a reduction in the rate of the mechanical properties in accordance with table.3.

Table 3

	The permissible reduction in the rate of mechanical properties, %
Mechanical properties	for control samples	for radial samples	for tangential specimens of forgings with a diameter of
			up to 300 mm	over 300 mm
Tensile strength	10	10	5	5
Yield strength	10	10	5	5
Elongation	50	35	25	30
The relative narrowing	40	35	20	25
Toughness	50	40	25	30

(Changed edition, Rev. N 1, 2, 3, 4).

2.7. Mechanical properties of forgings like rings, manufactured by rolling, must meet table.2.

2.8. Properties of forgings made of steel produced by electroslag remelting, vacuum arc remelting and refining other smelting methods, should be established by agreement between manufacturer and consumer, in this case the plastic properties and impact toughness should be not less than given in table.2 for steels with open smelting.

2.9. Chemical composition of steels and alloys for forgings must comply with trebovaniye 5632−72.

2.10. Forgings of steels and alloys stipulated by GOST 5632−72, as well as alloys of KHN32T, KHN78T and KHN65MV should be resistant against intergranular corrosion.

(Changed edition, Rev. N 2).

2.11. Forgings shall be subjected to heat treatment. The heat treatment is given in the Appendix.

The number of heat treatments should not be more than two.

Forgings, since the heat treatment edit in a cold or heated condition, needs to be further heat treated to relieve internal stresses.

Additional leave for the heat treatment is not considered.

2.12. Group of forgings, and requirements for macro — and microstructure, mechanical properties at elevated temperatures (, , , ), internal defects, toughness at negative temperatures shall be indicated in the reference document on a specific forging.

3. ACCEPTANCE RULES

3.1. Forging accept batches or individually

The party should consist of forgings of one steel grade, manufactured by one drawing, in accordance with the terms of the acquisition are given in table.4 and issued a document about quality that contains:

Table 4

Group of forgings	The conditions of acquisition of party	Check	Sample
I	Forgings of one steel grade	-	-
II	Forgings of one steel grade, together the last heat treatment	Hardness	5% of the party, but not less than five forgings
C		Resistance to intergranular corrosion	One solid forging
		Hardness	5% of the party, but not less than five forgings
III	Forgings of one steel grade, together the last heat treatment according to the same mode	Hardness	100%
C		Resistance to intergranular corrosion	One solid forging
		Hardness	100%
IV	Forgings of one steel melting together the last heat treatment	Tensile test	For party up to 100 pieces — one solid forging.
		Test for impact strength	For party of more than 100 pieces 1% from the party, but at least two forgings
		Hardness	100%
IVК	Forgings of one steel melting together the last heat treatment	Resistance to intergranular corrosion	One solid forging
		Tensile test	For party up to 100 pieces — one forging;
		Test for impact strength	for party of more than 100 pieces 1% from the party, but at least two forgings
		Hardness	100%
V	Taken individually, each forging	Tensile test	100%
		Test for impact strength
V		Resistance to intergranular corrosion	100%
		Tensile test
		Test for impact strength

the name and trademark of manufacturer;

order number;

the weight and number of forgings;

the drawing number or the cipher forgings;

the chemical analysis results and the steel grade or alloy;

the melting number, batch number, and a group of forgings;

the results of mechanical tests;

the results of tests on the intergranular corrosion for forgings groups C, C, IVК and V;

heat treatment regime;

stamp of technical control;

the designation of this standard.

Allowed to combine a batch of forgings of similar configuration and size, made of steel of the same brand and different drawings.

(Changed edition, Rev. N 1, 4).

3.2. Appearance, size and shape test on each forging party.

3.3. To check the quality of the forgings selected sample in accordance with table.4.

At the request of the consumer forgings, selected in accordance with table.4, is subjected to ultrasonic inspection. Standards ultrasonic testing according to GOST 24507−80. Thus check at least 50% of the volume of controlled forging.

The sample for testing macro — and microstructure, internal defects, toughness at negative temperatures are indicated in NTD for specific forgings.

(Changed edition, Rev. N 2, 4).

3.4. Brand and chemical composition of the metal forgings are established on the basis of the document about the quality of the metal workpieces.

In the manufacture of forgings from metal, investment casting manufacturer of forgings, the chemical composition of the metal is determined by plavonia analysis of ladle samples. Allowed to carry out chemical analysis on metal forging.

3.5. If unsatisfactory test results on at least one sample for any of the indicators it is carried out re-test at twice the number of samples taken from forgings of the same party.

4. TEST METHODS

4.1. Appearance inspection of forgings is carried out visually, without the use of magnifying devices. Allowed to NTD on forgings to establish other methods to control the outer surface.

4.2. The number of samples for tests of metal forgings tensile two, the toughness of two, the intergranular corrosion of four, of which two samples should be control.

4.3. Mechanical properties of metal forgings groups IV, IVК, V and V are checked for longitudinal, transverse, tangential or radial samples in accordance with the requirements for a specific forging.

4.4. Samples for the determination of mechanical properties for the groups IV and resistance to intergranular corrosion of forgings groups C, C, IVК is cut from the inlet to the sample or from the body of the forgings, and forging groups V and V are cut from the allowance provided for each forging.

Allowed NTD to forgings, with a length of over 3 m, to establish overlaps on the samples to determine mechanical properties at both ends of the forging.

Allowed samples for mechanical testing of forgings of groups IV and IVК cut from samples of the same or a larger cross-section, separately forged from metal of the same melting and similar treatment for forgings.

In this case, the sample must be termoobrabotki with the forging of the party.

(Changed edition, Rev. N 2).

4.5. Samples for the determination of the resistance against intergranular corrosion forgings groups C and G allowed to cut from separately forged test of metal of the same melting, held a joint heat treatment.

4.6. The shape, size and location of the inlet for samples is determined by drawing forgings.

In the manufacture of a single forging from ingot overlap on the sample must be from the profitable parts.

4.7. The overlap on the sample must be separated from the forging without heating mechanical cutting.

4.8. Samples for mechanical test are not allowed to be subjected to a further heat treatment or heating.

4.9. Samples for mechanical testing of forgings of cylindrical and prismatic shape is cut from the inlet or from the body of the forging on the distance of the radius or diagonal from the outer surface of the forging.

When cutting samples from the reamed or hollow forgings with wall thickness up to 100 mm samples cut at a distance of the wall thickness of the forging, and when the thickness is over 100 mm at a distance of the wall thickness of the forging from the outer surface.

4.10. In the manufacture of transverse or tangential specimens of the axis should pass the same distance as that for the longitudinal samples.

4.11. Place cuttings samples from forgings and represenational non-cylindrical shape indicated in the drawing forgings.

4.12. By agreement with the consumer allowed to cut samples from the surface of the forging at a distance that excludes the influence of surface defects or from the centre.

4.13. Mechanical properties of forgings like rings, manufactured by rolling, defined on the tangential samples.

4.14. The tensile test is carried out according to GOST 1497−84 on cylindrical samples 10 mm in diameter with design length of 50 mm.

Allowed to conduct tests on samples with a diameter of 6 or 5 mm with an estimated length of 30 or 25 mm, respectively.

(Changed edition, Rev. N 2).

4.15. Impact strength testing is carried out according to GOST 9454−78 the samples of a type 1.

4.16. Hardness on the Brinell hardness is carried out according to GOST 9012−59.

Allowed the use of other methods of determining hardness, providing the required accuracy.

4.17. Chemical analysis carried out according to GOST 28473−90, GOST 12344−88*, GOST 12345−2001,12346−78 GOST, GOST 12347−77, 12348−78 GOST, GOST 12349−83, 12350−78 GOST, GOST 12351−81**, 12352−81 GOST, GOST 12353−78, 12354−81 GOST, GOST 12355−78, 12356−81 GOST, GOST 12357−84, 12358−2002 GOST, GOST 12359−99, 12360−82 GOST, GOST 12361−2002, 12362−79 GOST, GOST 12363−79, 12364−84 GOST, GOST 12365−84 or by another method ensuring the accuracy of the determination under specified standards.
______________
* On the territory of the Russian Federation GOST 12344−2003;
** On the territory of the Russian Federation GOST 12351−2003. — Note the manufacturer’s database.

(Changed edition, Rev. N 1).

4.18. Samples for determining the chemical composition of the steel forgings are selected according to GOST 7565−81.

4.19. The test of resistance to intergranular corrosion is carried out according to GOST 6032−89*.
________________
* On the territory of the Russian Federation GOST 6032−2003, here and hereafter. — Note the manufacturer’s database.

For alloy grade KHN78T test conducted by the method agreed between the manufacturer and consumer; for the alloy KHN65MV — on samples after provoking heating at 800 °C for 30 min in a boiling 30% solution of sulfuric acid (GOST 4204−77) supplemented with 40 g/l of iron sulfate (GOST 9485−74) within 48 h; grade KHN32T — AM by the method of GOST 6032−89.

4.20. Ultrasonic inspection of forgings is carried out in accordance with the method of the manufacturer of forgings, selected according to GOST 24507−80.

(Changed edition, Rev. N 4).

4.21. Control methods of macro — and microstructure, internal defects, mechanical properties at elevated temperatures, test toughness at negative temperatures are indicated in NTD for specific forgings.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Forgings shall be marked in accordance with the drawing at a specific forging.

The marking must be clearly legible and contain:

trademark of the manufacturer;

the mark of the technical control Department;

the drawing number of the part or the cipher forgings;

grade of steel;

the room melt;

the group number;

the number of forgings (V and V groups of forged pieces).

Labels and markings can be printed or written indelible ink.

If you cannot marking of forgings due to the configuration and size of the batch of forgings shall be supplied with a label with the requisite marking and the indication of the number of forgings in the party.

5.2. The markings stamped forgings established in NTD for specific forgings.

5.3. Transport marking of forgings must comply with GOST 14192−96.

5.4. Packing of the forgings shall be specified in the reference document on forgings and to ensure the safety of forgings from mechanical damage.

Forgings weighing up to 10 kg are transported in wooden boxes, manufactured according to GOST 18617−83, 10198−91 GOST and other normative and technical documentation.

5.5. Forgings shall be transported by all modes of transport in open vehicles in accordance with transportation rules and conditions of loading and fastening of cargoes effective for this transport.

5.6. Forgings should be kept in conditions precluding the possibility of mechanical damage.

(Changed edition, Rev. N 2).

APPLICATION (recommended)

APP
Recommended

Steel grade	20X13	30X13	07KH16N4B	09KH16N4B
The mode of heat treatment	Quenching 1000−1050 °C in air or in oil, leave 660−770 °C, air cooling	Quenching 1000−1050 °C in oil, the release of 700−750 °C, air cooling	Hardening 1050 °C into oil, leave 650 °C stage 1, the release of 635 °C — 2 stage, air cooling	Heating 1140 °C, exposure 5−5,5 h, air cooling, vacation 600−620 °C, air cooling; tempering 1030−1050 °C, air cooling or oil, the release of 600−620 °C, air cooling; tempering 1030−1050 °C, air cooling or oil, the release of 600−620 °C, air cooling

Continued

Steel grade	20KH17N2	12H13	14KH17N2	08KH13
The mode of heat treatment	Quenching 1000−1050 °C in oil, leave 680−700 °C, air cooling	Quenching 1000−1050 °C in oil, the release of 700−790 °C With air cooling	Hardening 980−1020 °C in oil, leave 680−700 °C, air cooling	Quenching 1000−1050 °C in oil, leave 700−780 °C, cooling in oil

Continued

Steel grade	07KH16N6	08KH17N5M3	08KH18G8N2T	15KH18N12S4TJU
The mode of heat treatment	Hardening 1000 °C in water, air, cold treatment of 70 °C, 2 h, aging 380−400 °C, air cooling	Annealing (960±10) °C in air followed by cold treatment at -70 °C, exposure 2 h, aging 380−400 °C, 1 h, air cooling	Hardening of 950−1040 °C in water	Quenching 950 °C in water

Continued

Steel grade	08KH21N6M2T	08KH22N6T	10KH14G14N4T
The mode of heat treatment	Quenching 1000−1050 °C in water	Quenching 1000−1050 °C in water	Hardening 1000−1080 °C in water

Continued

Steel grade	10X17H13M2T	10H17N13M3T	03KH17N14M3
The mode of heat treatment	Annealing 1050−1100 °C in water or air	Annealing 1050−1100 °C in water or air	Hardening 1080−1100 °C in water

Continued

Steel grade	08KH17N15M3T	12KH18N9	12X18H9T
The mode of heat treatment	Annealing 1050−1100 °C in water or air	Annealing 1050−1100 °C in water	Annealing 1050−1100 °C in air or in water

Continued

Steel grade	04KH18N10	08X18H10	08KH18N10T
The mode of heat treatment	Annealing 1050−1100 °C in water	Annealing 1050−1100 °C in water or air	Annealing 1050−1100 °C in water or air

Continued

Steel grade	12KH18N10T	03Х18Н11	03KH21N21M4GB
The mode of heat treatment	Annealing 1050−1100 °C in water or air	Annealing 1050−1100 °C in water or air	Hardening 1060−1080 °C in water

Continued

Steel grade	10Х23Н18	KHN65MV	KHN78T
The mode of heat treatment	Quenching 1000−1050 °C in water or air	Annealing (1070±20) °C in water	Hardening 980−1020 °C in water or air

Continued

Steel grade	06HN28MDT	KHN32T
The mode of heat treatment	Annealing 1050−1100 °C in water or air	Hardening 1100−1150 °C in water or air

APP. (Changed edition, Rev. N 1).