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SCr420HB Mild Steel rod 50Mn2 16 MnCr5 20MnCr5 20rMoH Carbon Steel Low Alloy Bar SAE4320H 4140 20CrMnTiH Alloy Steel Bar SAE 1045 1020 Hot Rolled Iron Q195 Q215 Q235 Q275 Carbon Steel Round Bar S20C mild round bars factory best price 20# carbon steel round bar factory price China Supplier 6-600mm C45 1045 4140Carbon Steel Rod Steel Bar Chrome Plated Mild Steel Round Bar Price ASTM A311M EN10083-2 Factory Price Hot Rolled Carbon Steel Round Bar steel Rod for Construction Hot Sale Carbon Steel Rod Hot Dipped Black Carbon Steel Round Bar Custom Diameter 10mm 12mm 16mm 20mm Astm A36 Q235 Ss400 S235jr Q345b S355jr S20c 1045 S45c C45 1020 Hot Rolled Round Carbon Steel Bar High Quality High-Strength Carbon Steel round Steel Bar Competitive Price for Die Application ASTM Customized High Quality A36 Q235 Cold Rolled Carbon Steel Round Rod Bars