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China 宝钢Q/BQB SCr440 冷镦钢盘条 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SCr440 / SCr440
Category Grade Standard Region/Area Standard Content
Metals SCr440 Q/BQB 517 China 冷镦钢盘条

Chemical composition(mass fraction)(wt.%) of the SCr440

Element Min Max Similar
Cr 0.9000 1.2000 -
S - 0.0300 -
P - 0.0300 -
Mn 0.6000 0.9000 -
Si 0.1500 0.3500 -
C 0.3800 0.4300 -

Mechanical Properties of steel grade SCr440

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)
863 (≥) 311 (≥) 14 34 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical Properties of steel grade SCr440

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
22 - -     0.34 -  
687 618 - 31.3 144   -  
698 - 33 31.2   341 231

Heat Treatment of steel grade SCr440

Heat treated : 1915°C - 1256°C

Technological Curves of steel grade SCr440

Cross Reference Table (Equivalent Grade) of SCr440

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