... work well 3). Strict quality control. welded stainless steel pipe Namestainless steel handrailStandardASTM A554,A312,A249,A269 and A270Material Grade304, ... 320G, 400G Satin / Hairline400G, 500G, 600G or 800G Mirror finishApplicationsanitation fittings,Bridge railings / Handrails, Deck railings / Handrails, Porch RailingsTestSquash test, ... %≥35%≥35%Hardness(HV)<253<253<200<200 stainless steel handrail