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,321,347,S30813Excellent Dimensional Accuracy and consistency ...