... steel products, including stainless steel seamless pipes,stainless steel bar and stainless steel sheet. The material have 201,202,301 ... 709,ASTMA302,ASTMA537,API X52,API X 42 and so on.specificationThickness:0.5mm-140mmProduction technologyHot rolledCold ... #,220#,240#,320#400#,600#), Hairline,aid pickling and so onProduction technologySeamless steel pipeWelded steel pipeSurface treatmentPolishing or ...