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China 首钢Q/SG SQ235B 碳素结构钢热轧钢板 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SQ235B / SQ235B
Category Grade Standard Region/Area Standard Content
Metals SQ235B Q/SGZGS 292 China 碳素结构钢热轧钢板

Chemical composition(mass fraction)(wt.%) of the SQ235B

Element Min Max Similar
C 0.1200 0.1800 -
Si 0.1200 0.3000 -
Mn 0.4000 0.9000 -
S - 0.0250 -
P - 0.0300 -
Ni - 0.3000 -
Cr - 0.3000 -
Cu - 0.3000 -

Mechanical Properties of steel grade SQ235B

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)
679 (≥) 935 (≥) 44 24 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical Properties of steel grade SQ235B

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
14 - -     0.43 -  
156 856 - 23.3 424   -  
264 - 22 14.2   444 421

Heat Treatment of steel grade SQ235B

Heat treated : 1328°C - 1261°C

Technological Curves of steel grade SQ235B

Cross Reference Table (Equivalent Grade) of SQ235B

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