Most of the material we stock has one of three finish designations. The finish depends mainly on the alloy, the temper and — for 17-7PH® — the thickness.
Cold rolled on polished rolls, then annealed in a protective atmosphere so it keeps its bright, as-rolled surface.
Commonly found on: 300 Series Annealed (302 / 304, 304L, 316 / 316L, 321) and 17-7PH® Annealed .020″ thick and under.
A No. 2 finish produced by the cold rolling that gives tempered material its strength.
Commonly found on: cold-worked products — 300 Series and 17-7PH® tempered items (Quarter Hard, Half Hard, Full Hard, Condition C) and 1008 / 1010 #1 Temper.
Cold rolled and annealed, then pickled — or annealed and skin passed on dull rolls — for a uniform, non-reflective surface.
Commonly found on: 17-7PH® Annealed over .020″ thick.
At a glance
| Product | Typical finish |
|---|---|
| 300 Series Annealed (302 / 304, 304L, 316 / 316L, 321) | 1BA |
| 17-7PH® Annealed, .020″ and under | 1BA |
| 17-7PH® Annealed, over .020″ | 2D |
| 300 Series tempered (Quarter, Half, Full Hard) | 2TR |
| 17-7PH® Condition C | 2TR |
| 1008 / 1010 #1 Temper | 2TR |
Finish designations describe how a surface is made. To compare how smooth one surface is against another, mills measure Ra, a single number for surface roughness — see what surface finish Ra means.
If your drawing or purchase order requires a specific finish or a maximum Ra, include it with your request for quote.
Finishes listed are those commonly supplied; finish can vary by mill and product. This article is educational information only.