High-temperature Nickel-based alloy.
The recommended maximum operating temperature for limited time +750 °C. the Temperature of beginning of intensive scaling in air +1050 °C.

Standards

Name	Code	Standards
Bars and shapes	В32	GOST 23705-79, TU 14-11-245-88, TU 14-1-684-73
Classification, nomenclature and General rules	В30	GOST 5632-72
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, OST 1 90405-91, OST 1 90406-91, TU 14-1-2548-78, TU 14-1-669-73
Processing of metals by pressure. Forgings	В03	TU 14-1-1530-75, TU 14-1-3803-84, TU 14-1-2918-80

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	As	Al	B	Ti	Mo	Sn	Sb	Pb	Bi	Ce
GOST 5632-72	0.04-0.08	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.3	-	0.7-1	≤0.01	2.6-2.9	≤0.3	-	-	≤0.001	-	≤0.02
TU 14-1-2918-80	0.04-0.08	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.07	-	0.7-1	≤0.01	2.65-2.95	-	-	-	≤0.001	-	≤0.02
TU 14-1-684-73	0.04-0.08	≤0.007	≤0.015	≤0.4	19-22	≤0.6	Rest	≤1	≤0.07	≤0.001	0.7-1	≤0.01	2.65-2.9	-	≤0.001	≤0.001	≤0.001	≤0.0001	≤0.02

Ni is the basis.
According to TU 14-1-2918-80 the chemical composition is given for ХН77ТЮРУ-ВД. In the alloy, the determination of impurities of non-ferrous metals is made: antimony, tin, bismuth, arsenic, the content of which should not exceed 1 score of a ten-point scale of spectral analysis. Boron and cerium are introduced into the alloy by calculation and chemical analysis are not determined.
According to TU 14-1-684-73 the chemical composition is given for ХН77ТЮРУ (ЭИ437БУ). Boron, cerium, and other technological additives introduced into the metal by calculation by chemical analysis are not determined. The tolerance for titanium is +0,050%. Mass fraction of residual elements - in accordance with GOST 5632. In case of deviation from the specified chemical composition, the use of individual metal smelting for its intended purpose is permitted in agreement with VIAM.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Forgings. Hardening in air, 1070-1090 °C (exposure 8 h) + Aging at 750-790 °C (aging 16 h), air cooling
	≥667	≥981	≥13	≥16	≥294	269-321
Bars hot rolled and forged and according to GOST 23705-79. Hardening in air, 1070-1090 °C (exposure 8 h) + Aging at 750-790 °C (aging 16 h), air cooling
	640-735	980-1130	12-30	14-30	294-686	262-321
	530-570	804-820	≥16	≥21	≥294	262-321
	≥510	650-670	≥14	≥29	-	-
	670-780	980-1220	13-30	16-36	294-686	-
	≥540	780-830	≥20	21-28	-	-
	≥530	670-735	≥17	23-30	-	-

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

Alloy KHN77TJURU (ЭИ437БУ)

Designation

Description

Note

Standards

Chemical composition

Mechanical properties

Description mechanical marks

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