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China 宝钢Q/BQB BM45C 塑模用钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: BM45C / BM45C
Category Grade Standard Region/Area Standard Content
Metals BM45C Q/BQB 135 China 塑模用钢

Chemical composition(mass fraction)(wt.%) of the BM45C

Element Min Max Similar
S - 0.0250 -
P - 0.0250 -
Mn 0.6000 0.9000 -
Si 0.1500 0.3500 -
C 0.4200 0.4800 -
Ni+Cr - 0.3500 -
Cu - 0.3000 -
Cr - 0.2000 -
S - 0.0350 -
P - 0.0300 -
Mn 0.6000 0.9000 -
Si 0.1500 0.3500 -
C 0.4200 0.4800 -
P - 0.0250 -
S - 0.0250 -
Mn 0.6000 0.9000 -
Si 0.1500 0.3500 -
C 0.4200 0.4800 -
Cu - 0.3000 -
Cr - 0.2000 -
P - 0.0300 -
S - 0.0350 -
Mn 0.6000 0.9000 -
Si 0.1500 0.3500 -
C 0.4200 0.4800 -

Mechanical Properties of steel grade BM45C

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)
887 (≥) 142 (≥) 33 14 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade BM45C

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 - -     0.44 -  
743 935 - 34.3 144   -  
479 - 14 21.2   132 121

Heat Treatment of steel grade BM45C

Heat treated : 1544°C - 1262°C

Technological Curves of steel grade BM45C

Cross Reference Table (Equivalent Grade) of BM45C

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