... materials. NameASTM-A554 Stainless Steel Welded PIpes ItemsSquare tubes, round tubes, oval pipes, special shaped pipes,empaistic pipes, ... %, Cr 18%316L: Ni10%~14%Outer Diameter6mm-219mmThickness0.25mm-3mmLength6m or as customers' request Tolerancea) Outer Diameter ... balcony,fence,bench,furniture,etcTestSquash test, extended test, water pressure test, crystal rot test, heat treatment, NDT Chemical ...