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Steel 40KH9S2 (4Х9С2)

Steel 10Х11Н20Т2Р (ЭИ696А) 10X23H10 steel Steel 10Х23Н18 (0Х23Н18) Steel 12Х25Н16Г7АР (ЭИ835) Steel 20X23H18 (EI417) Steel 40Х10С2М (ЭИ107) Steel 40Х9С2 (4Х9С2) Steel 45Х22Н4М3 (EP48) Steel 55Kh20G9AN4 (EP303)

Designation

Name The value
Designation GOST Cyrillic 40Х9С2
Designation GOST Latin 40X9C2
Transliteration 40H9S2
The chemical elements 40Cr9С2
Name The value
Designation GOST Cyrillic 4Х9С2
Designation GOST Latin 4X9C2
Transliteration 4H9S2
The chemical elements 4Cr9С2

Description

40KH9S2 steel is used: for the manufacture of valves for the intake and exhaust of automobile, tractor and diesel engines, pipes, heat exchangers, heat exchanger, grate, and fasteners.

Note

Steel heat-resistant, heat-resistant martensitic class.
Temperature intense scaling in air +850 °C.
Stable in sulfur-containing environments.

Standards

Name Code Standards
Sheets and stripes В23 GOST 103-2006
Sectional and shaped rolling В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006
Sheets and stripes В33 GOST 4405-75
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 14-1-3795-84, 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 0.35-0.45 ≤0.025 ≤0.03 ≤0.8 8-10 2-3 ≤0.6 The rest ≤0.3 ≤0.2 ≤0.2 ≤0.3 ≤0.2
Fe is the basis.

Mechanical characteristics

Section, mm t отпуска, °C sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2
Bars hot rolled and forged according to GOST 5949-75. Annealing at 850-870 °C, cooling in air or without heat treatment
- ≥440 ≥740 ≥15 ≥35 -
Rolled steel. Quenching in oil from 1050 °C + Vacation
- 300 - ≥2150 ≥5 - ≥600
A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
- - - ≥135 ≥54 ≥95 -
Long products, forgings. Quenching in oil from 900-1100 °C to + Vacation 500-540 °C, air cooling
- ≥690 ≥880 ≥25 ≥59 ≥687
Rolled steel. Quenching in oil from 1050 °C + Vacation
- 400 - - ≥7 - ≥560
A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
- - - ≥51 ≥70 ≥98 -
Rolled steel. Quenching in oil from 1050 °C + Vacation
- 500 - ≥1470 ≥11 - ≥410
A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
- - - ≥59 ≥34 ≥59 -
Rolled steel. Quenching in oil from 1050 °C + Vacation
- 600 - ≥1420 ≥15 - ≥350
A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
- - - ≥45 ≥29 ≥45 -
Rolled steel. Quenching in oil from 1050 °C + Vacation
- 700 - ≥1280 ≥18 - ≥300
A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
- - - ≥23 ≥33 ≥42 -
Rolled steel. Quenching in oil from 1050 °C + Vacation
- 800 - ≥1200 ≥22 - ≥300
A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
- - - ≥16 ≥71 ≥74 -
Rolled steel. Annealing at 850-870 °C, air cooling
- - ≥640 ≥880 ≥20 ≥58 -
- - ≥550 ≥820 ≥18 ≥64 -
- - ≥520 ≥780 ≥18 ≥63 -
- - ≥450 ≥780 ≥18 ≥62 -
- - ≥410 ≥590 ≥17 ≥65 -
- - ≥390 ≥520 ≥17 ≥80 -
- - ≥170 ≥215 ≥18 ≥92 -
- - ≥49 ≥78 ≥22 ≥99 -

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
kJ/m2 Toughness

Physical characteristics

Temperature r, кг/м3 l, Вт/(м · °С) a, 10-6 1/°С
0 7630 - -
20 7630 - -
100 7610 17 111
200 7580 - 111
400 7510 - 127
600 7440 22 143
800 7390 22 142
300 - 20 -
1000 - - 14

A description of the physical symbols

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

Technological properties

Name The value
Weldability Does not apply to welded structures.
Propensity to temper brittleness Inclined.
Forging temperature Start - 1200 °C, the end - 850 °C. the cross Sections up to 350 mm cooled in the furnace.
Flock-sensitive sensitivity not sensitive.

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