... G3448, DIN174585. Steel grade: 304, 304 321, 316, 316L, 310S6. Outside diameter: 6mm - 530mm 7. Wall thickness: 0 ... 70% Irrevocable LC at sight SpecificationsChina StandardSteel GradeStandardseamless steel tubesand pipesfor structural purposeGB/T8162-199910, 20, ... 94Seamless steel tubesfor petroleum crackingGB9948-8610, 20, 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo, JIS G3441-1988 stainless seamless steel tube 300 ...