... , Porch Railings / Handrails,Stair Railings / HandrailsStandardASTM A554, A249, A269 and A270Material Grade201: Ni 0.8%~1%202: Ni 3.5 ... particularly in the aviation industry. There are different grades and surface finishes of stainless steel to suit the environment the ... ,industrial stainless welded pipes, special-shaped pipes, stainless steelsheet and etc. Main materials are: 304, 201,202,316,316L ...