... 4.Build structure etc. carbon steel,mild steel SHS,RHS,CHS mild steel welded square profile/rectangular profile/ ... Material Co.,Ltd.Rectangular hollow section/Square steel pipe,Rectangular pipeDimensionSquare pipe:15*15-600* ... requestEndPlainTechniqueERW,Hot Rolled,Cold RolledTypeWeldedApplicationStructure,Machinery,Airport,Railway,Building,Construction ETC.Place of OriginTianjin,P.R.ChinaPackingBags, ...