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Japan JIS SCr440 机械结构用低合金钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SCr440 / SCr 440
Category Grade Standard Region/Area Standard Content
Metals SCr 440 JIS G4053 Japan 机械结构用低合金钢

Chemical composition(mass fraction)(wt.%) of the SCr 440

Element Min Max Similar
V - 0.2500 -
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mn 0.6000 0.8500 -
Cu - 0.3000 -
Cr 0.9000 1.2000 -
C 0.3800 0.4300 -
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mn 0.6000 0.9000 -
Cu - 0.3000 -
Cr 0.9000 1.2000 -
C 0.3800 0.4300 -

Mechanical Properties of steel grade SCr 440

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
688 (≥) 978 (≥) 42 42 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade SCr 440

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
43 - -     0.41 -  
928 442 - 41.3 332   -  
377 - 31 34.2   211 213

Heat Treatment of steel grade SCr 440

Heat treated : 1223°C - 1331°C

Technological Curves of steel grade SCr 440

Cross Reference Table (Equivalent Grade) of SCr 440

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