... company long-term supply stainless steel products, including stainless steel seamless pipes,stainless steel bar and stainless steel sheet. The material have 201,202,301, 309 309S 310, 310S,304 ... onProduction technologySeamless steel pipeWelded steel pipeSurface treatmentPolishing or not The stainless steel barstandardASTM,GBmaterial201,202,301,304,316,316L,316LN,317,317L,309,309S,310 ...