Thickness:0.3--25mm Outer diameter:10x10mm--400x400mm Grade:Q195B,Q235B Types: round/square/rectangular Weld steel pipeCommoditySquare steel pipeStandardsGB/T3524, GB/T8164, GB3091MaterialQ195B ,Q235BSpecification10*10-400*400mmWall Thickness0.3-25mmLength5.8m,6m or as per your requiredStructureweldSurface treatmentGalvanized, oiled or painted ,as peryour requirementRelevant TestChemical ...