Seamless Stainless Steel Tubes: Standard: ASTM A213,A269,A511,A312,A270 Grades:TP304,304L,316,316L,317L,310S, ... 321,347,S30813 Seamless Stainless Steel Tubes :Standard: ASTM A213,A269,A511,A312,A270 Grades:TP304,304L,316,316L,317L,310S ... , Electronical components, Medical instruments. Seamless Stainless Steel Tubes ASTM A213; A269; A3122