... 201# 1.52mm50*50mm stainless steel square pipe,stainless steel tube standard nickle percent good price ... cooperation 201# 1.52mm50*50mm stainless steel square pipe,stainless steel tubestandard nickle percentgood pricelong term cooperation Standard ... A312,JIS G3459,DIN17458 stainless square pipeApplication:oil, chemical, boiler industry, high temperature resistance,resistant corrosion.Steel grade:TP304L ...