| BS970: 1955 | BS970: 1991 | COLOUR CODE | DESCRIPTION |
| EN39B | 835M15 |  | Bright / black 4.1/4% nickel chromium case hardening steel |
| CHEMICAL ANALYSIS | |
| Car | 0.12 / 0.18 |
| Sil | 0.10 / 0.40 |
| Mang | 0.25 / 0.50 |
| Chr | 1.00 / 1.40 |
| Moly | 0.15 / 0.35 |
| Nick | 3.90 / 4.30 |
| INTERNATIONAL SPECIFICATION COMPARISON | |
| BRITISH BS 970:1991 | 835M15 |
| BRITISH BS 970:1955 | EN39B |
| GERMAN DIN | |
| FRENCH AFNOR | |
| SWEDISH SS | |
| AMERICAN SAE | |
| EUROPEAN STEEL NO. | |
| EUROPEAN STEEL NAME | |
| EUROPEAN STANDARD | |
| QUICK VIEW SYSTEM | |
| MACHINEABILITY | 60 |
| WELDABILITY | Pre / post heat precaution required |
| HARDENABILITY | High strength case hardening |
| SELECTION GUIDE AND USAGE EXAMPLES | As EN36B but tougher |
| SIZES. |
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