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Chinese steel Grade strong intensity alloy steel Q345B(Gr50), the executive standard is GB/T1591-94 of Chinese. The mechanical properties and chemic element is following:
Yield pointσs MPa Tensile strength
σb MPa
Extend rate
δs,
Work of concussionAkv, (vertical) J 180obending test
d= dia.
a= thicknessdia.
thicknessdia.side length),mm +20 0 -20 -40
≤16 16~35 35~50 50~100 Not less than thicknessdia., mm
Not less than ≤15 16~100
345 325 295 275 470~630 21 34 d=2a d=3a
Welding Photos :
Painted Photos:

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