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EU EN P420QH 承压钢锻件 - 第4部分:可焊细晶粒高屈服强度钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: P420QH / P 420 QH
Category Grade Standard Region/Area Standard Content
Metals P 420 QH EN 10222-4 EU 承压钢锻件 - 第4部分:可焊细晶粒高屈服强度钢

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

Element Min Max Similar

Mechanical Properties of steel grade P 420 QH

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)
391 (≥) 451 (≥) 42 14 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 331

Physical Properties of steel grade P 420 QH

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 - -     0.31 -  
867 412 - 41.3 242   -  
312 - 14 24.2   213 124

Heat Treatment of steel grade P 420 QH

Heat treated : 1494°C - 1252°C

Technological Curves of steel grade P 420 QH

Cross Reference Table (Equivalent Grade) of P 420 QH

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