... steel square tube,,StandardASTM,AISI,SUS,JIS,EN,DIN,BS,GBMaterial201,202,304,304L,309S,310S,316,316L,316Ti,317L ... 3 1/2 inch, 4inch,5 inch, 6inch, 8 inch, 10 inch, 12inch, 14inch, 16 inch, 18 inch, 20 inch, ... 030Cr16-1817-1918-2016-1816-18N3.5-5.54-68-10.510-14Mo2.0-3.0Mechanical PropertyMaterial Item 201202304316Tensile Strength≥ ... 30%≥35%≥35%Hardness (HV)<253<253<200<200 ASTM 316L stainless steel pipe