... , 08AL, M6, SPHC, 65Mn, T8-T10A, 20MnSi hot dipped galvanized coilSGCC SPCD SPGC SPCE STMA653 ASTM A792 Q195 DX51DThickness: 0 ... pipe / black tube , square pipe / Galvanized square hollow section We have advantage in quality, price, regular suppliesand services. Our products ... in the production of high-frequency square tube, with a combination of rolling, setting, cold rolling and welding. Good quality ...