... ,HL,200# polishing, 400 # polished 304 seamless tubeStainless steel is a production which not easy rust,acid resistance and corrosion resistance ... , 310S,304,304L, 316, 316L,317, 317L,321,409L, 904L, 410, 430,4Cr13.Tianjin development zone Ganghua Co.,Ltd which was established ... ,ST12,HJ58,HG60,DB685,16Mn,20G,65Mn,510l,ASTMA299,ASTMA515,ASTM A 572,ASTM A 709,ASTMA302,ASTMA537,API X52,API X 42 and ...