... 10mm*10mm~600mm*600mm --Welded Square Steel Pipe/Welded Square Steel Tube-- Material of Welded Square Pipe: 1) Q195 ... STBA26; A53(A, B), A333, A369 Standard of Welded Square Pipe: BS, ASTM, DIN, JIS, ASME O. ... : Suqare Product Type: Square tubes, ERW tubes, Welded steel pipe, Galvanized steel pipe etc.; Usage: Be ... with the same cross-sectional area of other non-round steel tube, it has light weight, ...