Steel 03Х11Н10М2Т (ЭП678; ANS-17)

Designation

Name	The value
Designation GOST Cyrillic	03Х11Н10М2Т
Designation GOST Latin	03X11H10M2T
Transliteration	03H11N10M2T
By chemical elements	03Cr11Н10Mo2Ti

Name	The value
Designation GOST Cyrillic	ЭП678
Designation GOST Latin	EP678
Transliteration	EhP678
By chemical elements	-

Name	The value
Designation GOST Cyrillic	ВНС-17
Designation GOST Latin	BHC-17
Transliteration	VNS-17
By chemical elements	WНС-17

Description

03Х11Н10М2Т steel is used: for the production of highly loaded disks of turbomachines, gear wheels, spindles, worms, parts, aircraft, operating in the temperature range from cryogenic to +500 °C; strength of welded and machined parts operating in aggressive atmospheric conditions at temperatures up to +400 ° C and cryogenic temperatures; nitride of parts for the aircraft industry; solid-rolled rings for different purposes; welding wire.

Note

High-strength corrosion-resistant Maraging steel.

Standards

Name	Code	Standards
Classification, nomenclature and General rules	В20	OST 1 90005-91
Bars and shapes	В32	OST 1 92049-76, TU 14-1-1540-75, TU 14-131-814-90, TU 14-1-3568-83, TU 14-1-4608-89
Blanks. Of the workpiece. Slabs	В31	TU 14-1-1213-75, TU 14-1-1214-75, TU 14-1-2184-77, TU 14-1-3072-80
Processing of metals by pressure. Forgings	В03	TU 14-1-1530-75, TU 14-1-2100-77, TU 14-134-248-89, TU 14-1-5285-94
Sheets and strips	В33	TU 14-1-2035-77, TU 14-1-2095-77, TU 14-1-2151-77, TU 14-1-2494-78, TU 14-1-2519-78, TU 14-1-5132-92
Tape	В34	TU 14-1-3355-82, TU 14-1-3431-82
Welding and cutting metals. Soldering, riveting	В05	TU 14-1-3482-82

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al	B	Ti	Mo	Nb	Ca	Zr
TU 14-134-248-89	≤0.03	≤0.01	≤0.01	≤0.1	10-11.3	≤0.15	9-10.3	Rest	-	≤0.2	0.002	0.8-1	1.8-2.3	≤0.15	-	0.06
TU 14-1-1540-75	≤0.03	≤0.01	≤0.01	≤0.1	10-11.3	≤0.15	9-10.3	Rest	-	≤0.2	≤0.003	0.7-1.1	1.8-2.3	≤0.15	-	≤0.03
TU 14-1-1213-75	≤0.03	≤0.01	≤0.01	≤0.1	10-11.3	≤0.15	9-10.3	Rest	≤0.3	≤0.2	-	0.6-1	1.8-2.3	≤0.15	-	-
TU 14-1-3568-83	≤0.03	≤0.01	≤0.01	≤0.1	10-11.3	≤0.15	9-10.3	Rest	≤0.3	≤0.2	0.002	0.7-1.1	1.8-2.3	≤0.15	≤0.06	0.06
TU 14-1-4608-89	≤0.03	≤0.01	≤0.01	≤0.1	10-11.3	≤0.15	9-10.3	Rest	≤0.3	≤0.2	0.003	0.6-1	1.8-2.3	≤0.15	-	0.06
TU 14-1-2151-77	≤0.03	≤0.01	≤0.01	≤0.1	10-11.3	≤0.15	9-10.3	Rest	-	≤0.2	≤0.002	0.7-1.1	1.8-2.3	≤0.15	-	≤0.06
TU 14-1-5285-94	≤0.03	≤0.01	≤0.01	≤0.1	10-11.3	≤0.15	9-10.3	Rest	-	≤0.2	-	0.7-1.1	1.8-2.3	≤0.15	-	-

Fe is the basis.
According to TU 14-1-1540-75 the chemical composition is given for steel grade 03H11N10M2T (EP678). Boron, zirconium, calcium and niobium are introduced into the metal by calculation and chemical analysis are not determined. Deviations in chemical composition are allowed: by nickel -0.20%, by silicon and manganese, provided that their sum will be no more than 0.25%, sulfur and phosphorus, provided that their amount is not more than 0.020%.
According to TU 14-1-2151-77, the chemical composition is given for steel 03Х11Н10М2ТУ-ВД (ЭП678У-ВД); total mass fractions P + S ≤ 0.022%, Mn + Si ≤ 0.30%.
According to TU 14-1-3482-82, the chemical composition is given for a welding wire of steel grade Sv-03Kh11N10M2T-VD (EP678-VD).
According to TU 14-1-5285-94, the chemical composition is given for steel grade 03H11N10M2T-ID (EP678U-ID).
According to TU 14-1-1213-75, the chemical composition is given for steel grade 03Х11Н10М2Т-ВД (ЭП678У-ВД). Deviations in chemical composition are allowed in the finished product: carbon + 0.0050%, chromium ± 0.20%, nickel -0.20%. Boron and zirconium are introduced according to the calculation of 0.0020% and 0.060%, respectively, without taking into account the carbon monoxide and chemical analysis are not determined. Deviations in sulfur and phosphorus are allowed provided that their total mass fraction will not exceed 0.022%, as well as for silicon and manganese, provided that their total mass fraction does not exceed 0.30%.
According to TU 14-1-4608-89 the chemical composition is given for steel grade 03H11N10M2T-VD (EP678U-VD). Boron and zirconium are introduced into the metal by calculation without taking into account the burn and chemical analysis is not determined. Deviations from the chemical composition are permissible: carbon +0.0050%, chromium ± 0.20%, nickel -0.20%. Deviations in sulfur and phosphorus are allowed, provided that the total mass fraction does not exceed 0.022%, and also for silicon and manganese, provided that the total mass fraction does not exceed 0.30%.
According to TU 14-1-3568-83, the chemical composition is given for steel grade 03H11N10M2T-VD (EP678U-VD). The content of boron, zirconium and calcium is indicated by calculation without taking into account the burn and chemical analysis is not determined. Deviations in chemical composition are allowed: for nickel -0.20%, for chromium +0.30%. Deviations in sulfur and phosphorus are allowed, provided that their total content does not exceed 0.020%, and also for silicon and manganese, provided that their total content does not exceed 0.25%. In steel grade 03H11N10M2T-ID (EP678-ID), the zirconium content should not be more than 0.030%, the calcium content - not more than 0.050%. At the request of the customer, specified in the order, steel is supplied with a titanium content of 0.80-1.10% and aluminum not more than 0.15%.
According to TU 14-134-248-89 the chemical composition is given for steel grade 03H11N10M2T-ID (EP678U-ID). In the metal, boron and zirconium are added by calculation to the values of 0.0020% and 0.060%, respectively, without taking into account the fumes. Boron and zirconium are not determined by chemical analysis. Deviations in chemical composition are allowed: carbon +0.0050%, chromium ± 0.20%, nickel +0.20%, silicon and manganese, with a total content of not more than 0.30%, sulfur and phosphorus subject to a total content of not more than 0.022%, in titanium +0.10%. Residual content of elements in the chemical composition of steel - in accordance with GOST 5632.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa	HRC
Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91
-	-	1180-1370	-	-	-	302-376	33-41
-	-	1370-1570	-	-	-	-	41-45
-	-	-	-	-	-	269-363	28-39
Ring forged in OST 1 92049-76. Quenching in water from 910-930 °C (extract 3 hours) + Aging 560-660 °C (exposure 6 h), air cooling
	≥1180	≥1275	≥8	≥30	≥294	-	-
Ring forged in OST 1 92049-76. Annealing in air or in water with 840-880 °C (aging of 1.0-1.5 h) + Aging at 580-630 °C (delay 2-3 hours), air cooling
	≥1030	≥1230	≥11	≥50	≥590	-	-
Forgings on the other 14-134-248-89. Transverse samples of the reforged billet sq, cu. 80-100 mm. Hardening in air, 930-970 °C (40 minutes exposure) + Aging at 550-570 °C (delay 2-3 hours), air cooling
	≥1128	≥1230	≥6	≥25	≥294	-	-
Bars hot rolled and forged steel 03Х11Н10М2Т-VD on the other 14-1-3568-83. The longitudinal samples. Hardening in air, 845-875 °C (delay of 40-60 minutes) + Aging at 490-510 °C (exposure 2 hours), air cooling
	≥1325	≥1420	≥8	≥40	≥294	-	-
Bars hot rolled and forged steel 03Х11Н10М2Т-ID on the other 14-1-3568-83. The longitudinal samples. Annealing in air with 850-870 °C (delay of 40-60 minutes) + Aging 585-615 °C (exposure 2 hours), air cooling
	≥885	≥1080	≥12	≥50	≥588	-	-
Bars hot rolled and forged on the other 14-1-1540-75. Quenching in water from 1180-1220 °C (exposure 1.5 h) + Annealing in air, 845-875 °C (40 minutes exposure) + Aging at 570-630 °C (exposure 2 hours), air cooling
	≥1030	≥1230	≥11	≥50	≥590	-	-
Bars hot rolled and forged on the other 14-1-1540-75. Hardening in air, 845-875 °C (40 minutes exposure) + Aging at 490-510 °C (exposure 2 hours), air cooling
	≥1225	≥1420	≥7	≥35	-	-	-
Bars hot rolled and forged THAT 14-1-4608-89. Group 1. The longitudinal samples. Bars up to 100 mm: Hardened in air or in water 950-980 °C + Aging at 500-520 °C (extract to 4.0-4.5 hours), air cooling; Rods over 100 mm: Triple tempering in air or in water 950-980 °C (40 minutes exposure) + Aging at 500-520 °C (extract to 4.0-4.5 hours), air cooling
	≥1270	≥1370	≥8	≥35	≥343	-	-
Bars hot rolled and forged THAT 14-1-4608-89. Group 2. The longitudinal samples. Bars up to 100 mm: Hardened in air or in water 950-980 °C (40 minutes exposure) + Aging at 500-540 °C (extract to 4.0-4.5 hours), air cooling; Rods over 100 mm: Triple tempering in air or in water 950-980 °C (40 minutes exposure) + Aging at 500-540 °C (extract to 4.0-4.5 hours), air cooling
	≥1325	≥1420	≥8	≥35	≥441	-	-

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number
HRC	Rockwell hardness (indenter diamond spheroconical)

Technological properties

Name	The value
Machinability	Intractable.
Macrostructure and pollution	Pollution steel non-metallic inclusions estimated average score on the methods and scales GOST 1778 (SH1 Ш4 or method) and should not exceed: nitride inclusions - 3.0 points, silicates, non-deformed - 2.5 points, other types of inclusions - 1.0 points. The surface quality and macrostructure must meet the requirements of GOST 5949.