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Japan JIS SACM645 铝铬钼钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SACM645 / SACM 645
Category Grade Standard Region/Area Standard Content
Metals SACM 645 JIS G4202 Japan 铝铬钼钢

Chemical composition(mass fraction)(wt.%) of the SACM 645

Element Min Max Similar
Si 0.1500 0.5000 -
S - 0.0300 -
P - 0.0300 -
Ni - 0.2500 -
Mo 0.1500 0.3000 -
Mn - 0.6000 -
Cu - 0.3000 -
Cr 1.3000 1.7000 -
C 0.4000 0.5000 -
Al 0.7000 1.2000 -

Mechanical Properties of steel grade SACM 645

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)
779 (≥) 663 (≥) 33 11 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade SACM 645

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
12 - -     0.42 -  
689 971 - 33.3 144   -  
422 - 34 32.2   424 112

Heat Treatment of steel grade SACM 645

Heat treated : 1327°C - 1518°C

Technological Curves of steel grade SACM 645

Cross Reference Table (Equivalent Grade) of SACM 645

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