... H08, S08, 08AL, M6, SPHC, 65Mn, T8-T10A, 20MnSi hot dipped galvanized coilSGCC SPCD SPGC SPCE STMA653 ASTM A792 Q195 DX51DThickness: 0 ... round pipe / black tube , square pipe / Galvanized square hollow section We have advantage in quality, price, regular suppliesand services. Our products ... /T6728-2002) or ASTM A500 or EN10219We are specialized in the production of high-frequency square tube, with a ...