... SP-75 DIN2605 JISB2311 JISB2312 JISB2313, BS, GB, ISOMaterial --Carbon steel --ASTM A234WPB,,A234WPC,A420WPL6. 20#,Q235,10#,20#,A3, Q235A ... ASTM A333 GR.6 ; API 5L GRB, X60, X65, X42,X52, ectStainless Steel --ASTM A403 WP304,304L,316,316L,321. 1Cr18Ni9Ti, 00Cr19Ni10 ... ,00Cr17Ni14Mo2, etcAlloy Steel --ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,16MnR, Cr5Mo ...