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China 舞钢Q/WTB Q390D 大厚度低合金结构钢Q390技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q390D / Q390D
Category Grade Standard Region/Area Standard Content
Metals Q390D WYJ 102 China 大厚度低合金结构钢Q390技术条件

Chemical composition(mass fraction)(wt.%) of the Q390D

Element Min Max Similar
Al 0.0200 - -
Ti - 0.2000 -
Cu - 0.3000 -
V - 0.2000 -
Nb - 0.0700 -
Ni - 0.5000 -
Mo - 0.1000 -
Cr - 0.3000 -
S - 0.0150 -
P - 0.0200 -
Mn - 1.7000 -
Si - 0.5000 -
C - 0.2000 -

Mechanical Properties of steel grade Q390D

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)
329 (≥) 895 (≥) 42 33 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical Properties of steel grade Q390D

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
33 - -     0.31 -  
424 793 - 33.3 421   -  
193 - 23 42.2   413 421

Heat Treatment of steel grade Q390D

Heat treated : 1685°C - 1229°C

Technological Curves of steel grade Q390D

Cross Reference Table (Equivalent Grade) of Q390D

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