ABNT NBR steel grades — 72 designations
Every grade designated under ABNT NBR, with the material number it maps to, what kind of steel it is, its carbon window and how many other standards carry it. Open a grade for its full composition, properties and its designations in other standards. Every name on this page is an indicative cross-reference, not an asserted identity: the grades are close, not interchangeable. Check the composition before you substitute.
Also known as
72 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| 1020 | 1.1151 | Quenched and tempered steels | 0.17–0.24 | 15 |
| 1035 | 1.1181 | Quenched and tempered steels | 0.32–0.39 | 20 |
| 1045 | 1.1191 | Quenched and tempered steels | 0.42–0.5 | 21 |
| 1050 | 1.1206 | Quenched and tempered steels | 0.47–0.55 | 17 |
| 1055 | 1.1203 | Quenched and tempered steels | 0.52–0.6 | 15 |
| 1060 | 1.1221 | Quenched and tempered steels | 0.57–0.65 | 18 |
| 1070 | 1.1231 | Spring steels | 0.65–0.73 | 18 |
| 1074 | 1.1248 | Spring steels | 0.7–0.8 | 11 |
| 1080 | 1.0616 | Spring steels | 0.83–0.88 | 8 |
| 1080 | 1.1265 | Spring steels | 0.84–0.88 | 5 |
| 1080 | 1.9615 | Spring steels | 0.75–0.88 | 5 |
| 1095 | 1.0618 | Others | 0.9–0.95 | 5 |
| 1095 | 1.1274 | Spring steels | 0.95–1.05 | 13 |
| 1095 | 1.1283 | Others | 0.96–1 | 5 |
| 1095 | 1.9618 | Others | 0.9–1.03 | 5 |
| 301 | 1.4310 | Stainless steels | 0.05–0.15 | 18 |
| 301 | 1.4319 | Stainless steels | ≤ 0.07 | 11 |
| 301 | 1.4324 | Special steels for aviation and aerospace | ≤ 0.12 | 7 |
| 302 | 1.4300 | Stainless steels | ≤ 0.12 | 15 |
| 302 | 1.4310 | Stainless steels | 0.05–0.15 | 18 |
| 302 | 1.4324 | Special steels for aviation and aerospace | ≤ 0.12 | 7 |
| 302 | 1.4325 | Stainless steels | 0.03–0.15 | 11 |
| 304 | 1.4301 | Stainless steels | ≤ 0.07 | 23 |
| 304 | 1.4314 | Special steels for aviation and aerospace | ≤ 0.07 | 4 |
| 304 L | 1.4306 | Stainless steels | ≤ 0.03 | 18 |
| 304 L | 1.4307 | Stainless steels | ≤ 0.03 | 14 |
| 304 L | 1.4309 | Cast stainless steels | ≤ 0.03 | 7 |
| 316 | 1.4401 | Stainless steels | ≤ 0.07 | 20 |
| 316 | 1.4436 | Stainless steels | ≤ 0.05 | 19 |
| 316 | 1.4984 | High-temperature steels / aviation variant | 0.04–0.1 | 4 |
| 316 L | 1.4404 | Stainless steels | ≤ 0.03 | 25 |
| 316 L | 1.4432 | Others | ≤ 0.03 | 11 |
| 316 L | 1.4435 | Stainless steels | ≤ 0.03 | 20 |
| 321 | 1.4541 | Stainless steels | ≤ 0.08 | 25 |
| 321 | 1.4544 | Special steels for aviation and aerospace | ≤ 0.08 | 6 |
| 409 | 1.4512 | Stainless steels | ≤ 0.03 | 10 |
| 409 | 1.4720 | Heat resistant steels | ≤ 0.08 | 5 |
| 410 | 1.4006 | Stainless steels | 0.08–0.15 | 26 |
| 410 | 1.4024 | Stainless steels | 0.12–0.17 | 13 |
| 420 | 1.2083 | Tool steels for cold work | 0.36–0.42 | 16 |
| 420 | 1.4021 | Stainless steels | 0.16–0.25 | 18 |
| 420 | 1.4028 | Stainless steels | 0.26–0.35 | 18 |
| 420 | 1.4031 | Stainless steels | 0.36–0.42 | 18 |
| 420 | 1.4034 | Stainless steels | 0.43–0.5 | 18 |
| 420 | 1.4038 | Stainless steels | 0.48–0.55 | 5 |
| 430 | 1.4011 | Others | ≤ 0.15 | 7 |
| 430 | 1.4016 | Stainless steels | ≤ 0.08 | 18 |
| 6151 | 1.8159 | Quenched and tempered steels | 0.47–0.55 | 27 |
| NBR 5000 Grau 35 | 1.0045 | Unalloyed structural steels | ≤ 0.24 | 17 |
| NBR 5004 Grau Q35 | 1.0045 | Unalloyed structural steels | ≤ 0.24 | 17 |
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.