Alloy KHN70VMTJUF (ЭИ826; ХН70ВМФТЮ)

Designation

Name	The value
Designation GOST Cyrillic	ХН70ВМТЮФ
Designation GOST Latin	XH70BMTJuF
Transliteration	HN70VMTYuF
By chemical elements	CrNi70ВCuTeAlP

Name	The value
Designation GOST Cyrillic	ЭИ826
Designation GOST Latin	EI826
Transliteration	EhI826
By chemical elements	-

Name	The value
Designation GOST Cyrillic	ХН70ВМФТЮ
Designation GOST Latin	XH70BMFTJu
Transliteration	HN70VMFTYu
By chemical elements	CrNi70ВCuPTeAl

Description

Alloy KHN70VMTJUF used: for the manufacture of turbine blades.

Note

High-temperature Nickel-based alloy.
The recommended maximum operating temperature for limited time +850 °C, duration at +800 °C.
The temperature of beginning of intensive scaling in air +1050 °C.

Standards

Name	Code	Standards
Bars and shapes	В32	GOST 23705-79, TU 14-1-5.9-73, TU 14-11-245-88
Classification, nomenclature and General rules	В30	GOST 5632-72
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al	V	B	Ti	Mo	W	Ce
GOST 5632-72	≤0.12	≤0.009	≤0.015	≤0.5	13-16	≤0.6	Rest	≤5	≤0.3	2.4-2.9	0.2-1	≤0.015	1.7-2.2	2.5-4	5-7	≤0.02

Ni is the basis.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Rolled steel. Annealing in air
≤25	≥720	≥1050	≥10	≥12	≥196	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (aging 16 h), air cooling
-	580-630	1030-1120	15-22	16-25	≥285	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥710	≥980	≥12	≥14	-	≥290
Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling to 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥660	≥1010	≥16	≥17	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (aging 16 h), air cooling
-	≥500	≥930	≥22	≥28	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥660	≥1080	≥10	≥8	-	≥295
Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling to 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥490	≥920	≥17	≥18	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (aging 16 h), air cooling
-	510-590	930-1030	15-23	13-27	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥590	≥1040	≥17	≥17	-	≥280
Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling to 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥480	≥710	≥15	≥18	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (aging 16 h), air cooling
-	≥530	≥840	≥20	≥25	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥540	≥950	≥15	≥13	-	≥285
Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling to 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥420	≥670	≥15	≥17	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (aging 16 h), air cooling
-	500-560	710-790	12-17	12-25	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥490	≥840	≥17	≥17	-	≥240
Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling to 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥450	≥710	≥12	≥14	-	-
Bars hot rolled and forged and according to GOST 23705-79. Hardening in air, 1200-1220 °C (exposure 2 hours) + Heating to 1040-1060 °C (exposure 2 hours), air cooling + Ageing at 790-810 °C (aging 16 h), air cooling
	≥705	≥1030	≥10	≥12	≥196	299-341
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (aging 16 h), air cooling
-	≥480	≥600	≥13	≥23	-	-
Rolled steel. Annealing in air at 1180 °C (exposure 6 h) + step-Aging: 1000 °C (extract 8 hours), furnace cooling to 900 °C (exposure 8 h), air cooling + ageing at 850 °C (extract 15 h), cooling air (indicated by temperature and duration of heat exposure)
-	≥590	≥1030	≥15	≥16	-	≥280
Bars hot rolled and forged and according to GOST 23705-79. Hardening in air, 1200-1220 °C (exposure 2 hours) + Heating to 1040-1060 °C (exposure 2 hours), air cooling + Ageing at 790-810 °C (aging 16 h), air cooling
	≥570	≥780	≥8	≥11	≥343	-
Rolled steel. Annealing in air at 1210 °C (extract 2 h) + Annealing in air 1050 °C (exposure 4 h) + Ageing at 800 °C (extract 16 h), air cooling
-	≥710	≥1030	≥10	≥12	≥196	-
Bars hot rolled and forged and according to GOST 23705-79. Hardening in air, 1200-1220 °C (exposure 2 hours) + Heating to 1040-1060 °C (exposure 2 hours), air cooling + Ageing at 790-810 °C (aging 16 h), air cooling
	≥510	≥670	≥12	≥15	-	-
Rolled steel. Annealing in air at 1210 °C (extract 2 h) + Annealing in air 1050 °C (exposure 4 h) + Ageing at 800 °C (extract 16 h), air cooling
-	≥660	≥960	≥25	≥30	-	-
-	≥660	≥970	≥22	≥28	-	-
-	≥630	≥960	≥12	≥15	-	-
-	≥570	≥830	≥10	≥15	-	-
-	≥390	≥580	≥15	≥20	-	-
-	≥305	≥410	≥18	≥25	-	-

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

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C
0	196	-	9	-
20	200	8470	88	-
500	167	-	19	135
600	162	-	21	137
700	152	-	23	14
800	142	-	26	145
900	127	-	28	145
100	-	-	11	103
200	-	-	13	118
300	-	-	15	125
400	-	-	17	13
1100	-	-	-	15

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Weldability	Difficult weldability.
The temperature of forging	Start - 1180 °C, the end - 1060 °C. Cooling air.