Stainless Steel Finishes

Columbus ASTM/ ASME EN DIN Description
Unground - - - Slabs with no grinding.
Ground - - - Slabs with grinding.
HR - 1U a1 Hot rolled (not heat treated, not descaled). Suitable for products which are to be further worked (e.g. re-rolling).
HRA - 1C Ic Hot rolled and heat treated (not descaled). Suitable for industrial heat resisting and materials handling applications.
HRP - - - Hot rolled and pickled (not heat treated).
No. 1 No. 1 1D IIa Hot rolled, heat treated and descaled. Suitable when smoothness and uniformity of finish are not important.
2D No. 2D 2D IIIb Cold rolled, heat treated and pickled. Dull, smooth finish. Suitable for forming applications.
2B No. 2B 2B IIIc 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. 4 No. 4 2G IV A linearly textured polished finish, one or both sides, with a typical surface roughness (Ra) of about 0.6 m.
SB No. 6 2J - ScotchBrite finish, one or both sides, with a transverse Ra <0.5 m.
SSB - - - Superior ScotchBrite finish, one or both sides, with a transverse Ra <0.25 m.
BA Bright Annealed Finish 2R IIId 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.