Flat bar is a plain steel bar with a rectangular cross-section; its width is markedly greater than its thickness. It is produced by hot or cold rolling.
Its simple geometry makes it easy to cut, drill and weld, which is why it is very widely used as a gusset plate and reinforcing member.
Technical specifications
| Section | 20×3 – 200×30 mm |
|---|---|
| Grade | S235JR, S275JR |
| Standard | EN 10058 |
| Production | Hot / cold rolled |
| Length | 6,000 mm |
| Use | Connections, reinforcement, wrought iron |
Hot or cold rolled?
Hot-rolled flat bar has wider dimensional tolerances and a rougher surface; it is sufficient for structural work and more economical.
Cold-rolled flat bar has tighter tolerances and a smoother surface; it is preferred for visible work and precise assembly.
Where it is used
- Gusset plates and reinforcement in steel structures
- Door, railing and wrought iron work
- Support and slide parts in machine building
- Connection elements in racking and warehouse systems
When ordering
Always write the section as width × thickness (e.g. 40×5). Reversing it causes confusion in the order.
Also state whether you work in metres or tonnes, and your hot/cold rolled preference.