| Columbus |
ASTM/ ASME |
EN |
Description |
| Unground |
- |
- |
Slabs with no grinding. |
| Ground |
- |
- |
Slabs with grinding. |
| HR |
- |
1U |
Hot rolled (not heat treated, not descaled). Suitable for products which are to be further worked (e.g. re-rolling). |
| HRA |
- |
1C |
Hot rolled and heat treated (not descaled). Suitable for industrial heat resisting and materials handling applications. |
| No. 1 |
No. 1 |
1D |
Hot rolled, heat treated and descaled. Suitable when smoothness and uniformity of finish are not important. |
| 2D |
No. 2D |
2D |
Cold rolled, heat treated and pickled. Dull, smooth finish. Suitable for forming applications. |
| 2B |
No. 2B |
2B |
Cold rolled, heat treated and pickled. Bright and smoother finish than 2D (obtained by skin passing or tension levelling). |
| 2E |
No. 2B |
2E |
Cold rolled, heat treated and mechanically descaled, may be followed by pickling. Rough and dull finish. |
| No. 3 |
No. 3 |
2G |
A linearly textured polished finish, one or both sides, typically using 120 grit polishing belts, with a transverse Ra < 1.5µm. |
| No. 4 |
No. 4 |
2G |
A linearly textured polished finish, one or both sides, typically using 180 to 240 grit polishing belts, with a transverse Ra < 1µm. |
| SB |
No. 6 |
2J |
ScotchBrite finish, one or both sides, with a transverse Ra <0.5 µm. |
| SSB |
- |
- |
Superior ScotchBrite finish, one or both sides, with a transverse Ra <0.25 µm. |
| BA |
Bright Annealed Finish |
2R |
Cold rolled, bright annealed finish, retained by final annealing in a controlled atmosphere furnace (may be skin passed). Smooth, bright, reflective finish. |
| BE |
- |
- |
Columbus 2B cold rolled, but final anneal in a controlled atmosphere furnace. |
| TR |
TR |
2H |
Finish obtained by Cold Rolled, annealed pickled and Temper Rolled. |
