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Square steel pipe supply condition?
Supply conditions
Supply grade:Q195-Q235 ,Q345,S235,S355,S235JR,S355JR,STK400/500.
Supply standard:GB/T6728：2002，ASTMA500，JISG3466，EN10210，EN10219，ASTM A500 Gr.A.B.C.
Specification:size 10*10--500*500mm,tickness 0.6mm-25.0mm.
Length：stand length is 6m and 12m,cut to length is available upon request.
Surface finished:black,bare,varnish coating/anti rust oil.