316 stainless steel tube 1)surface:2B,BA,NO.1,NO.2,NO.4 2)certificate:BV,SGS 3)Standard :ASTM GB SUS ... DIN AISI 316 stainless steel tube StandardASTM,AISI,GB,BS,JIS,EN,DISOuter Diameter10mm-600mmWall ... test,crystal rot test,heat treatment,NDTFeatureRepresentative type of Ferrite stainless steel, with magnetic good cost performance, price stability Good ...