... , Eastern Asia, Western alloy steel round bar 1. hot rolled ordinary carbon round barSize: 10mm-300mm,Material: Q235 ... 2. hot rolled good-quality round bar Size: 12mm-300mm,Material: 10#--45#, S20C ... , S45C 3. hot rolled lower alloy round bar Size: 12mm-300mm,Material: Q345 4. hot ... rolled alloy round bar Size: 12mm-300mm,Material: 20Cr-40Cr, ...