SS Round Steel Specification: We supply all standards round steel according to the customers' request,ASIS,ASTM,GB,JIS,DIN. Round Steel:1.Diameter: 16-90mm Q235 2:Diameter: 38-140mm 45# 3:Material:Q235/45# Q345 ST52 SS4004.Length;6m/8m(7m/9m)...We supply all standards round steel according to the customers' request,ASIS,ASTM,GB,JIS,DIN.Welcom for your inquiry. S.S round steel bar