... 12mSteel materialQ195 → Grade B, SS330,SPHC, S185Q215 → Grade C,CS Type B,SS330, SPHCQ235 → Grade D,SS400,S235JR ... 1998, GB/T13793-1992,UsageUsed For Structure, Accessorize And ConstructionEndsPlainSurface Treatment1) Bared2) Black (or other color ... Arc Welded (DSAW)TypeWelded Welded Line TypeLongitudinalSection ShapeSquare and rectangularInspectionWith Hydraulic Testing, Eddy Current , Infrared ...