... ,Q390,16MnStandardASTM, DIN,GBUsageUsed For Structure, Automotive,Machinery,Airport, Railway And Construction and so on.EndsUsually Plain Or By Your ChoiceSurfaceBared Or With ... Oiled Or Client OptionTechniqueERW ,Hot Rolled and Cold RolledTypeWeldedWelded Line TypeLongitudinalSection ShapeSquare or rectangularInspectionWith Hydraulic Testing, Eddy ...