ASTM A554 stainless steel welded tube&pipe: 1.Grade:201,202,301,304,316L,etc 2. ... :TIG From the nature, To the excellence. NameStainless Steel Welded Tube &PipeItemsSquare tubes, round tubes, oval pipes, special shaped pipes, empaistic ... %≥35%≥35%Hardness (HV)<105<100<90<90Application stainless steel welded tube&pipe