Alloy Steel Round Bar 1.Standard: GB,AISI,ASTM,DIN,JIS 2.Material:8#,10#,25#,35# etc 3.Diameter:50--800mm Alloy Steel Round Bar1.Standard: GB, AISI,ASTM,DIN,JIS2. Material:8#,10#,20#,25#,35#,45#,20-40Cr,20-40CrMo,38CrMoAL,20-40CrMnMo,20-40CrNiMo,T8A-T13.Diameter:50mm-800mm alloy steel round bar