... 3.black,galvanized etc 4.Build structure etc. structural mild steel SHS,RHS,CHS ERW Mild Steel Square Pipe SHS RHSTianjin Haiyunda Metal Material Co.,Ltd ... other requestEndPlainTechniqueERW,Hot Rolled,Cold RolledTypeWeldedApplicationStructure,Machinery,Airport,Railway,Building,Construction ETC.Place of OriginTianjin,P.R.ChinaPackingBags,Bundle,In bulk ...