Alloy ХН67ВМТЮ (ЭП202; KHN67MVTJU)

Designation

Name	The value
Designation GOST Cyrillic	ХН67ВМТЮ
Designation GOST Latin	XH67BMTJu
Transliteration	HN67VMTYu
By chemical elements	CrNi67ВCuTeAl

Name	The value
Designation GOST Cyrillic	ЭП202
Designation GOST Latin	EP202
Transliteration	EhP202
By chemical elements	-

Name	The value
Designation GOST Cyrillic	ХН67МВТЮ
Designation GOST Latin	XH67MBTJu
Transliteration	HN67MVTYu
By chemical elements	CrNi67CuВTeAl

Description

Alloy ХН67ВМТЮ used: for the manufacture of helical springs operating at 600−700 °C; welding constructions with high requirements for heat resistance and heat resistance; working and nozzle blades of gas turbines, casing, disc and sheet metal parts of turbines operating for a long period of time at temperatures up to + 800 °C; solid-rolled rings for different purposes.

Note

High-temperature Nickel-based alloy.
The recommended maximum operating temperature for a long time +800 °C, for a limited time +850 °C.
The temperature of beginning of intensive scaling in air to +1000 °C.

Standards

Name	Code	Standards
Bars and shapes	В32	GOST 23705-79, OST 1 92049-76, TU 14-1-3184-81, TU 14-1-592-73, TU 14-11-245-88
Sheets and strips	В33	GOST 24982-81, TU 14-1-1471-75, TU 14-1-5047-91
Classification, nomenclature and General rules	В30	GOST 5632-72
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-1214-75
Processing of metals by pressure. Forgings	В03	TU 14-1-1530-75, TU 14-1-588-73

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al	B	Ti	Mo	W	Ce
GOST 5632-72	≤0.08	≤0.01	≤0.015	≤0.5	17-20	≤0.6	Rest	≤4	≤0.3	1-1.5	≤0.01	2.2-2.8	4-5	4-5	≤0.01
TU 14-1-1471-75	≤0.08	≤0.01	≤0.015	≤0.5	17-20	≤0.6	Rest	≤4	≤0.3	1-1.5	≤0.01	2.2-2.8	4-5	4-5	≤0.01

Ni is the basis.
According to TU 14-1-1471-75 the chemical composition is given for an alloy of grades ХН67МВТЮ (ЭП202) and ХН7МВТЮ-ВД (ЭП202-ВД).

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Ring forged in OST 1 92049-76. Hardening in air, 1060-1080 °C (speed of 5.0-5.5 h), air cooling or Quenching in air, 1040-1060 °C (speed of 2.0-2.5 h), air cooling
25	≥450	≥835	≥15	≥18	≥490	-
Ring forged in OST 1 92049-76. Annealing in air from 1100-1150 °C (maintained for 5 hours) + Aging at 800-850 °C (exposure for 10 h), air cooling
25	≥550	≥930	≥16	≥18	≥343	-
Steel hot-rolled sheet (4.0 to 11.0 mm) in the delivery state according to GOST 24982-81. Hardening in air, 1140-1160 °C + Vacation on the samples at 830-870 °C (extract 5 h), air cooling
4-11	≥550	≥930	≥18	-	-	-
Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 3.9 mm) in the delivery state according to GOST 24982-81. Quenching in water or air with 1070-1090 °C + Vacation at 830-870 °C (extract 5 h), air cooling
≤3.9	-	≥930	≥15	-	-	-
The leaves are thin 0,8-2,5 mm as supplies on the other 14-1-1471-75. Annealing in air or in water 1070-1090 °C + Aging at 830-870 °C (maintained for 5 h), air cooling
	-	≥932	≥15	-	-	-
Bars hot rolled and forged and according to GOST 23705-79. Annealing in air from 1100-1150 °C (maintained for 5 hours) + Aging at 800-850 °C (exposure for 10 h), air cooling
	550-706	930-1160	16-35	18-35	392-784	241-341
	490-640	830-980	16-30	16-32	490-882	-
	490-590	690-780	12-25	16-30	490-882	-

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

Technological properties

Name	The value
Features of heat treatment	The optimal conditions of hardening treatment of alloy ХН67ВМТЮ for cylindrical helical springs: a) annealing with ISO—1150°C, air cooling, cold plastic deformation with compression of 50% and aging at 700 °C for 6 h, air cooling for operation at +600 °C; b) annealing with ISO—1150°C, air cooling, cold plastic deformation with compression of 25% and aging at 800 °C for 6 h, air cooling for operation at +700 °C.