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China 唐山国丰Q/TGF 420CL 汽车结构用热轧钢带 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 420CL / 420CL
Category Grade Standard Region/Area Standard Content
Metals 420CL Q/TGF 310 China 汽车结构用热轧钢带

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

Element Min Max Similar
C - 0.1200 -
Si - 0.0500 -
Mn - 1.4000 -
P - 0.0300 -
S - 0.0250 -
Alt 0.0200 - -

Mechanical Properties of steel grade 420CL

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)
277 (≥) 149 (≥) 31 31 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical Properties of steel grade 420CL

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 -  
347 219 - 34.3 112   -  
524 - 33 41.2   214 144

Heat Treatment of steel grade 420CL

Heat treated : 1281°C - 1155°C

Technological Curves of steel grade 420CL

Cross Reference Table (Equivalent Grade) of 420CL

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