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Steel 20KH20N14S2 (ЭИ211)

Designation

Name The value
Designation GOST Cyrillic 20Х20Н14С2
Designation GOST Latin 20X20H14C2
Transliteration 20H20N14S2
The chemical elements 20Cr20Н14С2
Name The value
Designation GOST Cyrillic ЭИ211
Designation GOST Latin EI211
Transliteration EhI211
The chemical elements -

Description

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

Note

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

Standards

Name Code Standards
Sectional and shaped rolling В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Sheets and stripes В23 GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19903-90
Metal forming. Forgings В03 GOST 25054-81
Sheets and stripes В33 GOST 4405-75, GOST 5582-75
Classification, nomenclature and general norms В30 GOST 5632-72
Sectional and shaped rolling В32 GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88
Bulls. Blanks. Slabs В31 OST 3-1686-90

Chemical composition

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 The rest ≤0.3 ≤0.2 ≤0.2 ≤0.3 ≤0.2
Fe is the basis.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, 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

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d5 Elongation after rupture
y The relative narrowing

Physical characteristics

Temperature r, кг/м3 l, Вт/(м · °С) R, НОм · м a, 10-6 1/°С
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

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
Forging temperature Beginning - 1170 °C, the end - 850 °C. the cross Sections up to 350 mm cooled in air.

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