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Japan JIS SMnC420 机械结构用锰钢和锰铬钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SMnC420 / SMnC 420
Category Grade Standard Region/Area Standard Content
Metals SMnC 420 JIS G4106 Japan 机械结构用锰钢和锰铬钢

Chemical composition(mass fraction)(wt.%) of the SMnC 420

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mn 1.2000 1.5000 -
Cu - 0.3000 -
Cr 0.3500 0.7000 -
C 0.1700 0.2300 -
Si 0.1500 0.3500 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mn 1.2000 1.5000 -
Cu - 0.3000 -
Cr 0.3500 0.7000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade SMnC 420

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)
879 (≥) 458 (≥) 21 11 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 321

Physical Properties of steel grade SMnC 420

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
34 - -     0.34 -  
972 355 - 34.3 131   -  
217 - 44 33.2   111 132

Heat Treatment of steel grade SMnC 420

Heat treated : 1129°C - 1348°C

Technological Curves of steel grade SMnC 420

Cross Reference Table (Equivalent Grade) of SMnC 420

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