h-type steel 1..Material:Q235 SS400 S235JR ST37-2 Q345 2.Size: ... 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 ... ,SM490A,SM490B,S235JIR,S355JR,ASTM A36,ASTMA572 GRADE42-65 h-type steel