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NMX · 7 grades

# NMX steel grades — 7 designations

Every grade designated under NMX, with the identifying and comparative data we hold for each. Open a grade for its full composition, properties and its designations in other standards. Every name on this page is recorded in our sources as this standard’s own designation for the grade.

## Also known as

 7 designations

| Grade | Also in other standards |
|---|---|
| [B-177](/materials/nmx/b-177 "B-177") | 1 |
| [B-199](/materials/nmx/b-199 "B-199") | 1 |
| [B-200](/materials/nmx/b-200 "B-200") | 1 |
| [B-254](/materials/nmx/b-254 "B-254") | 1 |
| [B-282](/materials/nmx/b-282 "B-282") | 1 |
| [B-284](/materials/nmx/b-284 "B-284") | 1 |
| [B-99](/materials/nmx/b-99 "B-99") | 1 |

**This grade’s own name** — recorded in our sources as this grade’s own designation under that standard.
**Indicative** — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.
**Withdrawn** — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.