Standard: EN 10088-2 (process route codes) · ASTM A480 (finish numbers) · JIS G4305
The finish of a stainless sheet is named twice: by a process-route code in EN 10088-2 (a digit for hot rolled, 1, or cold rolled, 2, followed by a letter) and by a number or name in ASTM A480 (No. 1, 2D, 2B, BA, No. 4, No. 8). Polished finishes are described loosely in the trade — No. 4 from one mill can look different from another’s — so for visible work agree a sample or a roughness value (Ra) as well as the code.
| EN 10088-2 | ASTM A480 / trade name | How it is made | Appearance | Typical use |
|---|---|---|---|---|
| 1U | – | Hot rolled, not heat treated, not descaled | Covered with mill scale | Only for material that is to be worked further |
| 1C | – | Hot rolled, heat treated, not descaled | Covered with mill scale | Parts that will be machined or descaled all over |
| 1E | – | Hot rolled, heat treated, mechanically descaled | Free of scale, rough | Plate for further processing |
| 1D | No. 1 | Hot rolled, annealed and pickled | Dull, rough, non-reflective | Plate, tanks, industrial and chemical equipment |
| 2H | – | Cold rolled and work hardened (temper rolled) | Bright | Springs, high-strength structural strip (tempers C700, C850…) |
| 2D | 2D | Cold rolled, annealed and pickled | Dull matt grey | Deep-drawn parts, parts that will be painted or hidden |
| 2B | 2B | Cold rolled, annealed, pickled and skin passed | Smooth, slightly reflective grey | The general-purpose finish: tanks, kitchen equipment, process plant |
| 2R | BA (bright annealed) | Cold rolled and bright annealed in a protective atmosphere | Smooth, highly reflective | Appliance trim, reflectors, lift and decorative panels |
| 2G | No. 3 | Ground with coarse abrasive (about 100–120 grit) | Uniform coarse lines | Kitchen equipment, architectural work to be re-polished |
| 2J | No. 4 | Brushed or dull polished (about 120–180 grit) | Satin, directional grain | Appliances, lift doors, cladding, catering equipment |
| 2J (agreed) | HL (hairline) | Brushed with long continuous lines | Fine, unbroken linear grain | Lift interiors, signage, architectural panels |
| 2K | – | Satin polished to a controlled low roughness | Smooth satin, low Ra | Architectural cladding in coastal or polluted sites |
| 2P | No. 8 (mirror) | Bright polished and buffed | Mirror | Decorative panels, signage, reflectors |
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