GB/T3094 10# Rectangular Hollow Section/Square Hollow Section Performance

10# Square Hollow Section Chemical Compositions

C ：0.07~0.13
Si：0.17～0.37
Mn：0.35～0.65
S ：≤0.035
P ：≤0.035
Cr：≤0.15
Ni：≤0.25
Cu：≤0.25

GB/T3094 10# Mechanical Property

Tensile strengthσb (MPa): ≥335
Yield strengthσs (MPa): ≥205
Elongation rateδ5 (%): ≥31
Section shrinkageψ(%): ≥55,
Hardness: no heat treatment,≤137HBs,
Sample size: sample size 25mm longitudinal

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