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| Approximate Hardness Conversion No.'s for Austenitic Stainless Steel Sheet | ||||
| Rockwell Hardness Number C Scale, 150 Kgf (HRC) | Rockwell Hardness Number A Scale, 60 Kgf (HRA) | Rockwell Superficial Hardness No. 15N Scale, 15 Kgf (15N) | Rockwell Superficial Hardness No. 30N Scale, 30 Kgf (30N) | Rockwell Superficial Hardness No. 45N Scale, 40 Kgf (45N) |
| 48 | 74.4 | 84.1 | 66.2 | 52.1 |
| 47 | 73.9 | 73.6 | 65.3 | 50.9 |
| 46 | 73.4 | 83.1 | 64.5 | 49.8 |
| 45 | 72.9 | 82.6 | 63.6 | 48.7 |
| 44 | 72.4 | 82.1 | 62.7 | 47.5 |
| 43 | 71.9 | 81.6 | 61.8 | 46.4 |
| 42 | 71.4 | 81 | 61 | 45.2 |
| 41 | 70.9 | 80.5 | 61.1 | 44.1 |
| 40 | 70.4 | 80 | 59.2 | 43 |
| 39 | 69.9 | 79.5 | 58.4 | 41.8 |
| 38 | 69.3 | 79 | 57.5 | 40.7 |
| 37 | 68.8 | 78.5 | 56.6 | 39.6 |
| 36 | 68.3 | 78 | 55.7 | 38.4 |
| 35 | 67.8 | 77.5 | 54.9 | 37.3 |
| 34 | 67.3 | 77 | 54 | 36.1 |
| 33 | 66.8 | 76.5 | 53.1 | 35 |
| 32 | 66.3 | 75.9 | 52.3 | 33.9 |
| 31 | 65.8 | 75.4 | 51.4 | 32.7 |
| 30 | 65.3 | 74.9 | 50.5 | 31.6 |
| 29 | 64.8 | 74.4 | 49.6 | 30.4 |
| 28 | 64.3 | 73.9 | 48.8 | 29.3 |
| 27 | 63.8 | 73.4 | 47.9 | 28.2 |
| 26 | 63.3 | 72.9 | 47 | 27 |
| 25 | 62.8 | 72.4 | 46.2 | 25.9 |
| 24 | 62.3 | 71.9 | 45.3 | 24.8 |
| 23 | 61.8 | 71.3 | 44.4 | 23.6 |
| 22 | 61.3 | 70.8 | 43.5 | 22.5 |
| 21 | 60.8 | 70.3 | 42.7 | 21.3 |
| 20 | 60.3 | 69.8 | 41.8 | 20.2 |
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