| 1/00 | Making non-ferrous alloys (by electrothermic methods C22B 4/00; by electrolysis C25C) |
| 1/02 | Making non-ferrous alloys (by electrothermic methods C22B 4/00; by electrolysis C25C) by melting |
| 1/03 | Making non-ferrous alloys (by electrothermic methods C22B 4/00; by electrolysis C25C) by melting using master alloys |
| 1/04 | Making non-ferrous alloys (by electrothermic methods C22B 4/00; by electrolysis C25C) by powder metallurgy (C22C 1/08 takes precedence) |
| 1/05 | Making non-ferrous alloys (by electrothermic methods C22B 4/00; by electrolysis C25C) by powder metallurgy (C22C 1/08 takes precedence) Mixtures of metal powder with non-metallic powder (C22C 1/08 takes precedence) |
| 1/06 | Making non-ferrous alloys (by electrothermic methods C22B 4/00; by electrolysis C25C) with the use of special agents for refining or deoxidising |
| 1/08 | Making non-ferrous alloys (by electrothermic methods C22B 4/00; by electrolysis C25C) Alloys with open or closed pores |
| 1/10 | Making non-ferrous alloys (by electrothermic methods C22B 4/00; by electrolysis C25C) Alloys containing non-metals (C22C 1/08 takes precedence) |
| 3/00 | Removing material from non-ferrous alloys to produce alloys of different constitution |
| 5/00 | Alloys based on noble metals |
| 5/02 | Alloys based on noble metals Alloys based on gold |
| 5/04 | Alloys based on noble metals Alloys based on a platinum group metal |
| 5/06 | Alloys based on noble metals Alloys based on silver |
| 5/08 | Alloys based on noble metals Alloys based on silver with copper as the next major constituent |
| 5/10 | Alloys based on noble metals Alloys based on silver with cadmium as the next major constituent |
| 7/00 | Alloys based on mercury |
| 9/00 | Alloys based on copper |
| 9/01 | Alloys based on copper with aluminium as the next major constituent |
| 9/02 | Alloys based on copper with tin as the next major constituent |
| 9/04 | Alloys based on copper with zinc as the next major constituent |