10KH11N20T3R steel is used: for the manufacture of forgings, long products and sheet, turbine disc, ring parts, fasteners, parts of the compressor and the working part of the turbine operating temperatures up to +700 °C.

Note

Steel heat-resistant austenitic class.
The recommended maximum operating temperature for a limited period of operation +700 °C. the Temperature of beginning of intensive scaling in air +850 °C.

Standards

Name	Code	Standards
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, TU 14-1-1671-76, TU 14-1-3957-85, TU 14-11-245-88
Blanks. Of the workpiece. Slabs	В21	OST 1 90176-75
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90
Processing of metals by pressure. Forgings	В03	TU 14-1-1530-75, TU 14-1-2902-80, TU 14-1-2918-80

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al	V	B	Ti	Mo	W
TU 14-1-2918-80	≤0.1	≤0.02	≤0.035	≤1	10-12.5	≤1	18-21	Rest	≤0.3	≤0.8	≤0.2	0.008-0.02	2.6-3.2	≤0.3	≤0.2
TU 14-1-2902-80	≤0.1	≤0.02	≤0.03	≤1	10-12.5	≤1	18-21	Rest	≤0.3	≤0.8	≤0.2	0.008-0.02	2.6-3.2	≤0.3	≤0.2
TU 14-1-1671-76	≤0.1	≤0.02	≤0.035	≤1	10-12.5	≤1	18-21	Rest	≤0.3	≤0.8	≤0.2	0.008-0.02	2.6-3.2	≤0.3	≤0.2

Fe is the basis.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Cold-rolled sheet. Annealing in air from 1100 °C
≥4	-	≥600	≥40	-	-	-
Forgings, rolled steel hot rolled and forged GOST 5949-75 and Forming at OST 1 90176-75. Annealing in air or in oil with 1100-1170 °C (exposure 2 hours) + Aging at 700-750 °C (extract 15-25 h), air cooling
	≥590	≥880	≥10	≥15	≥294	255-302

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
20	160	7900	152	-
400	140	-	205	199
500	135	-	226	203
600	132	-	238	211
700	115	-	251	218
800	113	-	268	216
900	90	-	285	213
100	-	-	163	159
200	-	-	175	174
300	-	-	188	188

A description of the physical symbols

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

Steel 10KH11N20T3R (ЭИ696)

Designation

Description