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China GB Q345GNHL 焊接结构用耐候钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q345GNHL / Q345GNHL
Category Grade Standard Region/Area Standard Content
Metals Q345GNHL GB/T 4172 China 焊接结构用耐候钢

Chemical composition(mass fraction)(wt.%) of the Q345GNHL

Element Min Max Similar

Mechanical Properties of steel grade Q345GNHL

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)
852 (≥) 254 (≥) 23 11 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

Physical Properties of steel grade Q345GNHL

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
41 - -     0.31 -  
563 814 - 41.3 323   -  
851 - 44 41.2   321 422

Heat Treatment of steel grade Q345GNHL

Heat treated : 1316°C - 1242°C

Technological Curves of steel grade Q345GNHL

Cross Reference Table (Equivalent Grade) of Q345GNHL

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