OST1 90126-85

UDC 018.44-422 OKP 08 7401

Approved GTU MAP USSR 15.10.1985 Group B 32

INDUSTRY STANDARD

HEAT-RESISTANT ALLOYS CASTING VACUUM MELTING

OST1 90126-85 *) In return OST1 90126-74, TU1-92-12-75, TU1-92-71-82, TU1-92-72-83, TU1-92-79-83, TU1-92-88-84, TU1-92-92-84, TU1-92-97-85, TU1-1-221-74, TU1-1-222-74, TU1-801-272-83, TU1-801-273-83

The deadline for introduction is set from 01.04.1986.

Failure to comply with the standard is punishable by law.

This standard applies to heat-resistant casting alloys of vacuum-induction smelting of the following grades: ZhSZ-VI, ZhSZDK-VI, ZhS6K-VI, ZhS6U-VI, ZhS16-VI, ZhS30-VI, VZhL1-VI, VZhL2-VI, VZhL12U-VI, VZhL12E-VI, VZhL14N-VI, VZhL18-VI, VKh4L-VI, VKh9L-VI, intended for subsequent remelting in vacuum-induction furnaces when casting blades and other shaped castings.

1 Assortment

1.1 Alloys are supplied in the form of cast rod blanks with a diameter of 65 mm or 90 mm of arbitrary length. The maximum deviation of blanks by diameter of 65 mm is plus or minus 5 mm, for blanks with a diameter of 90 mm minus 10 mm.

Developed by VIAM	Approved MAP - 15.10.1985	The term of introduction is from 01.04.1986.
		Validity period - unlimited

^{*) OST1 90126-85 was reissued in 2005 taking into account amendments No. 1 - 6.}

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2 Technical requirements

2.1 The chemical composition of the alloys must comply with the requirements of Table 1.

2.2 The mechanical properties and long-term strength of alloys, determined on control samples, must comply with the requirements of Table 2.

2.3 The rods are supplied mechanically processed. The processing is performed within the tolerance of diameter up to minus 10 mm with surface roughness according to the parameter R _z = 80-40 µm.

Removal of deep surface defects by local cleaning is permitted (to a depth of up to 15 mm, based on the actual size).

The following are not allowed on the surface of rod blanks: slag and non-metallic inclusions (oxide films), inclusions of foreign metal and ceramics, as well as build-ups that increase the diameter of the blank.

The following are allowed on the surface of rod blanks: non-melting, clean cavities and tarnish colours.

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Table 1

Item No.	Alloy brand	Mass fraction of elements, in %
		Carbon	Chromium	Nickel	Cobalt	Molybdenum	Tungsten	Aluminum	Titanium	Niobium	Cerium	Zirconium	Boron	Silicon	Manganese	Sulfur	Phosphorus	Yttrium	Lead	Bismuth	Iron	Other elements
											No more
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
1	JS3-VI	0.11-0.16	14.0-18.0	Main	-	3.0-4.5	4.5-6.5	1.6-2.2	1.6-2.3	-	-	-	0.005-0.01	0.6	0.6	0,009	0,015	-	-	-	8.0	Vanadium n.b. 0.3
2	ZhSZDK-VI	0.06-0.11	11.0-12.5	Main	8.0-10.0	3.8-4.5	3.8-4.5	4.0-4.8	2.5-3.2	-	0.02	-	0.02	0.4	0.4	0.01	0,015	-	-	-	2.0	-
3	JS6K-VI	0.13-0.20	9.5-12.0	Main	4.0-5.5	3.5-4.5	4.5-5.5	5.0-6.0	2.5-3.2	-	0.025	0.04	0.02	0.4	0.4	0,015	0,015	-	0,001	0,0005	2.0	-
4	ZHS16-VI	0.08-0.14	4.6-5.2	Main	6.0-8.0	-	15.3-16.5	5.6-6.2	0.7-1.2	1.6-2.1	0.02	0.02	0.02	0.2	0.4	0,015	0,015	-	0,001	0,0005	1.0	Lanthanum n.b. 0.02 Hafnium 0.7-1.2
5	ЖС6У-ВИ	0.13-0.20	8.0-9.5	Main	9.0-10.5	1.2-2.4	9.5-11.0	5.1-6.0	2.0-2.9	0.8-1.2	0.02	0.04	0.035	0.4	0.4	0,010	0,015	0.01	0,001	0,0005	1.0	-
6	GS30-VI	0.11-0.20	5.0-9.0	Main	7.5-9.5	0.4-1.0	11.0-2.6	4.8-5.8	1.4-2.3	0.4-1.4	0,015	0.02	0.02	0.4	0.4	0,010	0,015	0.03	-	-	1.0	Lanthanum n.b. 0.005 Hafnium 0.3-1.2 Calcium n.b. 0.005
7	VZhL1-VI	0.10-0.17	15.0-17.0	Main	-	3.5-5.0	2.0-2.5	2.0-2.8	2.0-3.0	-	-	-	0.09-0.13	1.2-2.0	0.3	0.02	0.02	-	-	-	6.0-7.5	-

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Continuation of table 1

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
8	VZhL2-VI	0.11-0.17	12.0-15.0	Main	-	12.0-15.0	8.0-10.0	1.5-3.0	2.0-3.2	-	-	-	0.065	1.0-2.0	-	0.02	0.02	-	-	-	2.0-3.5	-
9	VZhL12U-VI	0.14-0.20	8.5-10.5	Main	12.0-15.0	2.7-3.4	1.0-1.8	5.0-5.7	4.2-4.7	0.5-1.0	0.02	0.02	0,015	0.4	0.4	0,015	0,015	-	0,001	0,0005	2.0	Vanadium 0.5-1.0
10	VZhL12E-VI	0.12-0.20	8.5-10.0	Main	8.0-10.0	2.7-3.4	1.0-1.8	5.0-5.7	4.2-4.7	0.5-1.0	0,015	0.02	0,015	0.4	0.4	0,015	0,015	-	0,001	0,0005	2.0	Vanadium 0.5-1.0 Lanthanum n.b. 0.01
11	VZhL14N-VI	0.03-0.08	18.0-20.0	Main	-	4.0-5.0	-	1.2-1.5	2.5-2.9	1.8-2.8	0.025	-	0.005	0.4	0.4	0,015	0,015	-	-	-	8.0-10.0	-
12	VZhL18-VI	0.10-0.15	17.0-18.0	Main	4.0-6.0	4.5-6.0	2.5-4.0	3.4-4.0	2.2-3.0	1.2-1.8	0.02	0.02	0.06	0.4	0.4	0,015	0,015	-	0,001	0,0005	1.0	-
13	VH4L-VI	0.03-0.10	32.0-35.0	Main	-	2.3-3.5	4.3-5.5	0.7-1.3	0.7-1.3	0.7-1.3	0.03	-	0.008	0.3	-	0,010	-	0.04	-	-	0.50	Calcium n.b. 0.02
14	VKh9L-VI	0.02-0.1	30.0-35.0	Main	0.2-0.8	2.9-3.5	4.7-5.3	1.0-1.6	0.7-1.3	0.7-1.3	-	-	0.005	0.4	0.5	0,010	0,015	0.04	-	-	6.0	Calcium n.b. 0.02
Notes: 1 Boron, lanthanum, cerium, zirconium, yttrium and calcium are introduced by calculation and are not determined by chemical analysis. 2 In alloys: ZhS6K-VI, ZhS6U-VI, VZhL12U-VI, ZhS16-VI and ZhS6N-VI, a deviation of plus 0.005% is allowed for boron. 3 In the ZhSZDK-VI alloy, an increase in the mass fraction of cobalt to 11% is permitted. 4 In alloys: ZhS16-VI and ZhS30-VI, the content of hafnium and zirconium may be determined in total. 5 In the alloy ZhS3-VI, the allowed content of cobalt is up to 1.0%, cerium is up to 0.02%, zirconium is up to 0.05%. In the alloy VZhL1-VI, the allowed content of cobalt is up to 0.5%, cerium is up to 0.01%. In the alloy VZhL2-VI, the allowed content of cobalt is up to 2.0%. 6 In the alloy ZhS6K-VI, a deviation of plus 1.0% in cobalt is allowed. 7 In the VZhL14N-VI alloy, the permissible deviation is minus 0.01% for carbon, plus 0.2% for aluminum, and plus 0.1% for titanium. 8 The mass fraction of vanadium allowed in the alloy ZhS30-VI is no more than 0.1%. Vanadium is introduced by calculation and is not determined by chemical analysis. The presence of accompanying rare earth metals is allowed in the alloy ZhS30-VI: neodymium, gadolinium, praseodymium and others in an amount of no more than 0.015%, which are not determined by chemical analysis. 9 In the VZhL18-VI alloy, a deviation of minus 0.5% in chromium is allowed. 10 In alloys ZhS6K-VI, ZhS6U-VI and VZhL12U-VI the presence of non-compounding elements is permitted: In the alloy ZhS6K-VI the total amount of vanadium, niobium and hafnium is no more than 0.2%, with vanadium being no more than 0.1%; In the alloy ЖС6У-ВІ the total amount of vanadium and hafnium is no more than 0.2%, with vanadium being no more than 0.1%; In the VZhL12U-VI alloy the hafnium content is no more than 0.2%; The VZhL14N-VI alloy may contain the following non-blendable elements: cobalt and tungsten no more than 0.3% (each element), vanadium no more than 0.1%.

OST1 90126-85

Table 2

Item No.	Alloy brand	Thermal treatment mode for control samples	Mechanical properties at room temperature, not less than				When testing for long-term strength
			Ultimate strength, σ in N/mm² (kgf/mm²)	Relative		Impact strength, KSU J/cm² (kgf m/cm²)	Test temperature, °C	Continuously applied stress, N/mm² (kgf/mm²)	Time to destruction, in hours not less than
				Elongation, δ 5 %	Narrowing, ψ %
1	2	3	4	5	6	7	8	9	10
1	JS3-VI	Heating for 7 hours at 1150±10°C, air cooling	-	-	-	-	800	250 (25)	40
2	ZhSZDK-VI	Heating up to 1210+15°C, exposure 3-4 hours, air cooling	930 (95)	7	-	29 (3)	850	340 (35)	50
3	JS6K-VI	Heating up to 1210+15°C, exposure 4 hours, air cooling	-	-	-	-	975	200 (20)	50
4	ЖС6У-ВИ	Heating up to 1210±10°C, exposure 4 hours, air cooling	830 (85)	3	-	-	975	230 (23)	40
5	ZHS16-VI	Without heat treatment	820 (84)	4	4	-	975	240 (24)	40
6	GS30-VI	Without heat treatment	830 (85)	3	-	-	975	240 (24)	40
7	VZhL1-VI	Without heat treatment	670 (68)	-	-	Brinell hardness HB 300-360	-	-	-
8	VZhL12U-VI	Without heat treatment, or heat treatment according to the mode: Heating up to 1210±10°C, exposure 4 hours, air cooling	830 (85)	5	7	-	975	200 (20)	40

OST1 90126-85

Continuation of table 2

1	2	3	4	5	6	7	8	9	10
9	VZhL12E-VI	Without heat treatment, or heat treatment according to the mode: Heating up to 1210±10°C, 4 hours exposure, air cooling	830 (85)	5	7	-	975	200 (20)	40
10	VZhL14N-VI	Heating up to 1120±10°C, holding 3 hours, air cooling. Aging at 700±10°C, 16 hours, air cooling.	830 (85)	9	10	39 (4)	600	590 (60)	100
11	VKh9L-VI	Quenching from 1160±10°C, holding 3 hours, air cooling, aging at 950±10°C, hold for 2 hours, cool in the air	780 (80)	5	-	-	800	180 (18)	100
12	VZhL18-VI	Heating up to 1180±10°C, holding 3.5 hours, cooling on air. Aging at 950±10°C, holding 3.5-4 hours, air cooling	880 (90)	2	2	-	900	240 (24)	40
13	VH4L-VI	Quenching from 1180±15°C, holding 4 hours, air cooling; aging at 900±10°C, 16 hours exposure, air cooling	780 (80)	4	-	20 (2)	800	206 (21)	40
Notes: 1 Alloy VZhL2-VI is supplied without heat treatment and determination of mechanical properties. 2 The need for heat treatment of control samples of VZhL12U-VI and VZhL12E-VI alloys is indicated in the order (in the case when castings from these alloys are used in products in a heat-treated condition). 3 Samples for long-term strength from every 10th heat are tested until failure. 4 For the VKh9L-VI alloy, determination of long-term strength at 800°C under a load of 210 N/mm² (21 kgf/mm²) with a time to failure of at least 40 hours is permitted.

OST1 90126-85

2.4 The following are not allowed in the fracture of rod blanks: slag and non-metallic inclusions (oxide films), inclusions of foreign metal and ceramics.

The presence of shrinkage looseness and clean cavities is not a rejection sign in the absence of contamination.

2.5 The quality of fractures and the surface of rod blanks must not be lower than the quality of fractures and the surface of standard samples approved by the Chief Engineer of the supplier plant and agreed upon with VIAM.

3 Acceptance rules and testing methods

3.1 Rod blanks are presented for acceptance in batches consisting of rod blanks from the same heat.

3.2 Each rod blank is subjected to surface condition control.

3.3 Fracture control is performed on one rod from each melt. If the fracture condition is unsatisfactory, all other rods of the given melt are subject to control.

3.4 Each melt is subject to control of the chemical composition of alloys, mechanical properties and long-term strength.

3.5 The chemical composition of alloys is determined according to GOST 12344, GOST 12345, GOST 12346, GOST 12347, GOST 12348, GOST 12349, GOST 12350, GOST 12351, GOST 12352, GOST 12353, GOST 12354, GOST 12356, GOST 12357, GOST 12360, GOST 12361, GOST 12364, GOST 12365, GOST 28473, GOST 24018.0, GOST 24018.3, GOST 24018.4 or another method that ensures the required accuracy of determination established by the standards.

3.6 Control samples for determining mechanical properties and long-term strength are made from trefoil-shaped ingots cast in a cold ceramic mold or from blanks cast in hot ceramic molds, in accordance with instruction PI 1.2.043.

OST1 90126-85

When casting samples from the ZhSZDK-VI alloy, modification of the alloy with yttrium is permitted in accordance with instruction PI1.2.277.

The pouring of trefoil-shaped blanks is carried out in a batch vacuum-induction furnace with an alloy obtained as a result of remelting rod blanks of a given melt. If the design of the vacuum-induction furnace for melting alloys allows pouring of trefoil-shaped ingots and blanks directly in the furnace working space during alloy casting, the pouring of trefoil-shaped ingots and blanks is carried out in the furnace itself.

3.7 Control of mechanical tensile properties is carried out on one sample in accordance with GOST 1497.

The long-term strength test is carried out on one sample in accordance with GOST 10145.

3.8 If unsatisfactory results are obtained from tests of mechanical properties and long-term strength, repeat tests are carried out on a double number of samples.

If unsatisfactory results are obtained from repeated tests on at least one sample, the melt is rejected.

3.9 The supplier plant, together with the batch of rods, sends to the consumer plant the remainder of the trefoil-shaped ingot that has passed the test, or a spare trefoil-shaped ingot.

3.9.1 By agreement with the consumer, metal from the shipped melt may be used instead of the trefoil-shaped ingot for casting samples at the consumer's.

3.10 The quality of the supplied rods is controlled in the delivery state and must meet the requirements of this OST.

4 Marking and packaging

4.1 Each bar blank of the supplied batch is marked with indelible paint or a striking stamp:

- conventional alloy index;

OST1 90126-85

- serial number of the melt.

4.2 Rod blanks are supplied in wooden or metal boxes with gross weight (not more than 650 kg). Only blanks from one heat are packed in each box. The blanks must be wrapped in waterproof paper according to GOST 8828 or bitumen packaging paper according to GOST 515.

4.3 A label indicating:

- alloy grades;

- melt numbers;

- weight (net);

- supplier;

- consumer.

4.4 Each batch of bar blanks is accompanied by a certificate indicating:

- number of this OST;

- alloy grade;

- chemical composition;

- results of tests of mechanical properties and long-term strength;

- mass;

- number of packing places;

- supplier;

- consumer.

5 Transportation and storage

5.1 Transportation and storage in accordance with GOST 7566.

OST1 90126-85

Appendix 1

Reference

Scroll

documents referenced in the industry standard

ND number	Name of the ND	The number of the item that contains the link
GOST 515-77	Bitumen and tar packaging paper. Technical conditions	4.2
GOST 1497-84	Metals. Tensile Test Method	3.7
GOST 7566-94	Metal products. Acceptance, marking, packaging, transportation and storage	5.1
GOST 8828-75	Two-layer packaging paper. General technical conditions	4.2
GOST 10145-81	Metals. Method of testing long-term strength	3.7
GOST 12344-78	Alloyed and high-alloy steels. Method for determining carbon	3.5
GOST 12345-80	Alloyed and high-alloy steels. Method for determining sulfur	3.5
GOST 12346-78	Alloyed and high-alloy steels. Method for determining silicon	3.5
GOST 12347-77	Alloyed and high-alloy steels. Method for determining phosphorus	3.5
GOST 12348-78	Alloyed and high-alloy steels. Method for determining manganese	3.5
GOST 12349-83	Alloyed and high-alloy steels. Method for determining tungsten	3.5
GOST 12350-78	Alloyed and high-alloy steels. Method for determining chromium	3.5
GOST 12351-81	Alloyed and high-alloy steels. Method for determining vanadium	3.5
GOST 12352-81	Alloyed and high-alloy steels. Method for determining nickel	3.5
GOST 12353-78	Alloyed and high-alloy steels. Method for determining cobalt	3.5
GOST 12354-81	Alloyed and high-alloy steels. Method for determining molybdenum	3.5
GOST 12356-81	Alloyed and high-alloy steels. Method for determining titanium	3.5
GOST 12357-66	Alloyed and high-alloy steels. Method for determining aluminum	3.5

OST1 90126-85

GOST 12360-32	Alloyed and high-alloy steels. Method for determining boron	3.5
GOST 12361-82	Alloyed and high-alloy steels. Method for determining niobium	3.5
GOST 12364-84	Alloyed and high-alloy steels. Method for determining cerium	3.5
GOST 12365-84	Alloyed and high-alloy steels. Method for determining zirconium	3.5
GOST 28473-90	Cast iron, steel, ferroalloys, chromium, metallic manganese. General requirements for analysis methods	3.5
GOST 24018.0-80	Heat-resistant nickel-based alloys. General requirements for analysis methods	3.5
GOST 24018.3-80	Heat-resistant nickel-based alloys. Method for determination of lead	3.5
GOST 24018.4-80	Heat-resistant nickel-based alloys. Method for determination of bismuth	3.5
PI 1.2.043-77	Production of samples for testing mechanical properties of casting alloys and steels for shaped castings	3.6
PI 1.2.277-85	Modification of the alloy ZhS3DK-VI when casting blades and other parts	3.6