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Name High quality ASTM A312 TP304 Stainless Steel Pipe Standard ASTM A554, A249, A269 and A270, A312 Material Grade 201 ( Ni 0.8%), 202 (Ni 3.5%~4.5%), 301(Ni 5%) 304 (Ni 8%, Cr 18%), 316 (Ni 10%, Cr ...