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China GB Q420FRC 耐火结构用钢板及钢带 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q420FRC / Q420FRC
Category Grade Standard Region/Area Standard Content
Metals Q420FRC GB/T 28415 China 耐火结构用钢板及钢带

Chemical composition(mass fraction)(wt.%) of the Q420FRC

Element Min Max Similar

Mechanical Properties of steel grade Q420FRC

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)
334 (≥) 789 (≥) 23 43 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade Q420FRC

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 - -     0.34 -  
399 197 - 41.3 223   -  
766 - 33 34.2   231 414

Heat Treatment of steel grade Q420FRC

Heat treated : 1419°C - 1516°C

Technological Curves of steel grade Q420FRC

Cross Reference Table (Equivalent Grade) of Q420FRC

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