... Technics:Bead removed & Bright annealed. Test:Eddy current & Hydrostatic test, etc. Stainless steel welded tube / pipe1. Standard: GB, ASTM, ... pickling, electropolishing, mechanical polishing.8. Test: eddy current, hydrostatic test, mechanical properties test, chemical test, etc.9. Packing: plastic bag, ... treatmentTS (Mpa)YS (Mpa)EL%(On the 12th test piece ------ Longitudinal)SUS304 TPD≥520206≥35No, if ...