HRC (hot rolled coil) is coil produced by rolling steel above its recrystallisation temperature. The common grades in Türkiye are S235JR, S275JR and S355JR; the standard is EN 10025-2.
HRC is not only a finished product but also the input for hollow section, pipe and cold-rolled sheet production.
Technical specifications
| Grade | S235JR, S275JR, S355JR |
|---|---|
| Thickness | 1.50 – 15.00 mm |
| Width | 900 – 1,800 mm |
| Standard | EN 10025-2 |
| Surface | Black / pickled |
| Use | Sections, pipe, structural work |
The difference between black and pickled
During hot rolling an oxide layer (mill scale) forms on the surface. If that layer has not been removed, the product is called "black".
On pickled product the scale is removed with acid and the surface becomes smoother and more suitable for painting and forming.
The grade codes
The difference between S235JR, S275JR and S355JR is the yield strength (235, 275, 355 MPa). "JR" indicates the impact toughness class.
A higher-strength grade lets the same load be carried with a thinner section, which can give an advantage in weight and cost.
Where it is used
- Main input for hollow section, pipe and flat bar production
- Structural and machine-building components
- Heavy plate work, tank and silo shells
- Feedstock for cold rolling