ASTM A554 stainless steel welded tube&pipe: 1.Grade:201,202,301,304,316L,etc ... .OD:9.53-254mm,TK:0.3-3.0mm 4.WELDED TYPE:TIG From the nature, To the excellence. NameStainless Steel ... Welded Tube &PipeItemsSquare tubes, round tubes, oval pipes, special shaped pipes, ... %≥35%≥35%Hardness (HV)<105<100<90<90Application stainless steel welded tube&pipe