... as your requirement Surface: black, bright 316 stainless steel round barApplication:Stainless steel bar applies to petroleum, chemical industry, ... 430,430F,4031,416 AISI 201,Y201Cu,2022.Starndard: ASTM,JIS,GB,EN,AISI3.Surface: Bright,Polished,Turn smooth ... resistant, low temperature resistant, corrosion resistant seamless steel pipe used.ContactOur products are very popular because of high-quality ...