... , crystal rot test, heat treatment, NDTSpecification:1). Model No.: 201201 stainless steel pipe with perfect surface settlement, strict tolerance, high quality, most reasonable ... , 316L ,321,317L,310S,904L and,etc.,3). Technique Cold Rolled,Hot Rolled, Cold/Hot Rolled,Cold Drawn 4). Surface: 180G, 320G, 400G Satin / Hairline400G, 500G ...