Tubing
Structural tubing (square and rectangular), round bar, and mechanical tube in special steels offer higher strength, rigidity, and durability—ideal for demanding structures and industrial components.
Steel Round Bar ASTM A36 (1/4" – 4 3/4")
ASTM A36 round bar is a hot-rolled carbon steel product, available in diameters from 1/4″ to 4 3/4″.
- Material: ASTM A36 structural steel.
- Section: round.
- Diameter range: 1/4" – 4 3/4".
- Good weldability and machinability.
- Hot-rolled surface finish.
- Easy to weld and machine.
- Structural versatility.
- Good strength-to-weight ratio.
- Wide availability.
- Construction: bolts, shafts, and supports.
- Machinery: transmission components.
- Fastening elements and structures.
Element | Composition (%) |
Carbon (C) | 0.26 máx. |
Manganese (Mn) | 0.60 – 0.90 |
Phosphorus (P) | 0.04 máx. |
Sulfur (S) | 0.05 máx. |
Property | Typical value |
Tensile strength | 400–550 MPa |
Yield strength | 250 MPa |
Elongation | 20–23% |
Brinell hardness | 130–180 HB |
Dimensions: diameters from 1/4" – 4 3/4".
Standard lengths: 6–12 m.
Manufacturing standards and tolerances per ASTM A36/A36M.
Equivalents: EN 10025 S235JR, JIS SS400, DIN St37-2.
ASTM A36 round bar is widely used in structural and mechanical applications due to its strength and ease of machining.