Steel 20KH20N14S2 (ЭИ211)

Designation

20KH20N14S2 steel is used: for the manufacture of furnace conveyors, boxes for carburizing and other parts heat treatment furnaces.

Austenite heat-resistant steel-ferritic class.
Temperature intense scaling in air 1000−1050 °C.
Resistant to carburizing environments.

Name	Code	Standards
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Sheets and strips	В23	GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19903-90
Processing of metals by pressure. Forgings	В03	GOST 25054-81
Sheets and strips	В33	GOST 4405-75, GOST 5582-75
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 5632-72	≤0.2	≤0.025	≤0.035	≤1.5	19-22	2-3	12-15	Rest	≤0.3	≤0.2	≤0.2	≤0.3	≤0.2

Fe is the basis.

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %
Rolled steel. Quenching in water from 1100 °C
-	≥390	≥630	≥33	≥43
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in water or air from 1000-1080 °C
-	-	≥590	≥40	-
Bars hot rolled and forged according to GOST 5949-75. Annealing in air 1000-1150 °C
	≥295	≥590	≥35	≥55
Rolled steel. Quenching in water from 1100 °C
-	≥110	≥300	≥36	≥44
-	≥110	≥265	≥39	≥49
-	≥98	≥225	≥41	≥55
-	≥39	≥110	≥49	≥60
Rolled steel. Quenching in water from 1150 °C
-	343-392	≥630	≥53	≥73
-	≥110	≥305	≥36	≥34
-	≥110	≥265	≥35	≥34
-	≥98	≥225	≥42	≥41
-	≥69	≥155	≥58	≥47
-	≥39	≥110	≥74	≥58
-	≥29	≥88	≥75	≥55

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

Temperature	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C
0	7800	-	946	-
20	7800	-	946	-
100	7760	15	1000	16
600	7550	23	1194	181
700	7510	24	1218	183
800	7470	26	1242	185
900	7420	28	1242	188
200	-	17	1051	-
300	-	18	1095	16
400	-	19	1130	-
500	-	21	1100	-
1000	-	-	-	188
1200	-	-	-	19

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

Name	The value
The temperature of forging	Beginning - 1170 °C, the end - 850 °C. the cross Sections up to 350 mm cooled in air.