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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)
334 (≥) 941 (≥) 31 44 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

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
31 - -     0.42 -  
976 265 - 23.3 313   -  
226 - 32 12.2   112 124

Heat Treatment of steel grade Q390D

Heat treated : 1316°C - 1653°C

Technological Curves of steel grade Q390D

Cross Reference Table (Equivalent Grade) of Q390D

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