... you quality,timely delivery; 3>Had been approved by ASTM. alloy seamless steel tube: Material: 12Cr1MoV, P22(10CrMo910), T91, P91, P9, ... /T or L/C Package: painting black, pipe cap, steel strips bundled or according to customer's requirement. Certificate:1 ... good cooperation with Chengdu Steel Group Co., Ltd., Baotou Steel Group Co., Ltd., Baoshan Steel Corporation and Tianjin Steel Pipe Group Co., Ltd ...