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Professional Factory Round Steel 10#20#35#45# Steel Hot Rolled Cold Drawn Structure Mild Round Steel Factory direct sale Astm A36 A283 A387 Q235 Q345 S235jr HRC hot rolled carbon steel coil Good price EN10025 low alloy high strength steel plate S355JR S355J2 hot rolled 16mm 20mm 24mm s355 steel plate S235jr S355jr Mild Carbon Steel Plate Hot Rolled 30mm Thick Carbon Steel Plate A36 ASTM Mild Carbon Steel Coil MS Coil for Building Material spcc carbon steel coils prime dc01 dco2 strip Q195 Q215 Q235 Q275 HRB400 HRB500 Carbon Steel Round Square Flat Iron Rod Bar Q235 Q235b 10mm 20mm 30mm 50mm 100mm Diameter Top Quality Black Mild Carbon Steel Round Bar