| Designation | AB 1 | AB 2 | |||
| Material | Aluminium bronze (copper aluminium) | Leaded phosphor bronze | |||
| Elements | Min | Max | Min | Max | |
| % | % | % | % | ||
| Copper | Remainder | Remainder | |||
| Tin | - | 0.1 |
- |
0.1 | |
| Zinc | - | 0.50 | - | 0.50 | |
| Lead | - | 0.03 | - | 0.03 | |
| Phosphorous | - | - | - | - | |
| Nickel | - | 1.0 | 4.0 | 5.5 | |
| Iron | 1.5 | 3.5 | 4.0 | 5.5 | |
| Aluminium | 8.7 | 10.5 | 8.8 | 10.0 | |
| Manganese | - | 1.0 | - | 3.0 | |
| Antimony | - | - | - | - | |
| Arsenic | - | - | - | - | |
| iron-arsenic + antimony | - | - | - | - | |
| Silicon | - | 0.2 | - | 0.1 | |
| Bismuth | - | - | - | - | |
| Sulphur | - | - | - | - | |
| Magnesium | 0.05 | - | 0.05 | ||
| Total Impurities | - | 0.30 | - | 0.20 | |