... company long-term supply stainless steel products, including stainless steel seamless pipes,stainless steel bar and stainless steel sheet. The ... 4Cr13stainless steel production: The details of my companyThe stainless steel sheet/coil/stripstandardASTM,GBmaterial201,202,301,304 ... pipeWelded steel pipeSurface treatmentPolishing or not The stainless steel barstandardASTM,GBmaterial201,202,301,304,316, ...