... .42mm19*19mm stainless steel square pipe,stainless steel tube standard nickle percent good price long term cooperation 201# 0.42mm19*19mm stainless steel square pipe,stainless steel ... -2002,GB13296-2007,ASTM A269,ASTM A312,JIS G3459,DIN17458 stainless square pipeApplication:oil, chemical, boiler industry, high temperature resistance,resistant corrosion ...