... .Flat Steel BarCarbon Structural Steel,Alloy Structural Steel ,Spring Steel 2.Round Steel BarCarbon Structural Steel,Alloy Structural Steel,Spring Steel,Carbon Tool Steel 3.Square Steel BarCarbon Tool Steel, Alloy Structural Steel ... ,S355JR,ASTM A36,ASTMA572 GRADE 50 HOT ROLLED STEELPLATEQ235,Q345,SS400,SM490A,SM490B,S235JIR,S355JR,ASTM A36,ASTMA572 GRADE42-65 hot rolles steel angle bars