| Grade | Br mT(KG) | Le HCB KA/M (Koe) | Hcj KA/m (Koe) | (BH)max KJ/m3)MGOe) |
Super temperrature de travail
(ºC) |
| N35 | 1170-1220(11, 7-12.2) | ≥868(≥10, 9) | ≥955(≥12) | 263-287(33 à 36) | 80 |
| N38 | 1220-1250(12, 2-12.5) | ≥899(≥11, 3) | ≥955(≥12) | 287-310(36-39) | 80 |
| N40 | 1250-1280(12.5-12.8) | ≥907(≥11, 4) | ≥955(≥12) | 302-326(38-41) | 80 |
| N42 | 1280-1320(12.8-13.2) | ≥915(≥11, 5) | ≥955(≥12) | 318-342(40-43) | 80 |
| N45 | 1320-1380(13.2-13.8) | ≥923(≥11, 6) | ≥955(≥12) | 342-366(43-46) | 80 |
| N48 | 1380-1420(13.8-14.2) | ≥923(≥11, 6) | ≥876(≥12) | 366-390(46-49) | 80 |
| N50 | 1400-1450(14.0-14.5) | ≥796(≥10, 0) | ≥876(≥11) | 382-406(48 à 51) | 60 |
| N52 | 1430-1480(14.3-14.8) | ≥796(≥10, 0) | ≥876(≥11) | 398-422(50 à 53) | 60 |