304 Stainless Steel Bar 1.Material:200,300,400series 2.Surface:cold drawing and hot rolled 3.Standard:JIS, ASTM, AISI, DIN. 304 Stainless Steel BarOur StrengthSince 1992 ... , and the roughness is controlled not more than 5um. Stainless Steel Bar GradeTP 202,TP 304, TP 304L, TP 310/S, TP 316/316L ... , Petroleum,3, Chemical industry4, Spinning and weaving5,Instrument and apparatus. 304 Stainless Steel Bar