我这里有关于镀层厚度标准：
| 级别 | C级 | D级 | E级 | F级 | G级 | H级 | I级 |
| 银含量% | 4 | 6 | 10 | 12 | 15 | 18 | 20 |
| 标称直径 | 镀层厚度u | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 0.05 | — | — | — | — | — | 2.3 | 2.7 |
| 0.07 | — | — | — | 2 | 2.6 | 2.3 | 3.7 |
| 0.08 | — | — | — | 2.3 | 3 | 3.7 | 4.2 |
| 0.10 | — | — | 2.4 | 2.9 | 3.7 | 4.7 | 5.3 |
| 0.12 | — | — | 2.8 | 3.5 | 4.5 | 5.6 | 6.4 |
| 0.14 | — | — | 3.3 | 4 | 5.2 | 6.5 | 7.4 |
| 0.15 | — | 2.0 | 3.5 | 4.3 | 5.6 | 7.0 | 8.0 |
| 0.16 | — | 2.2 | 3.8 | 4.6 | 6 | 7.4 | 8.5 |
| 0.18 | — | 2.4 | 4.2 | 5.2 | 6.7 | 8.4 | 9.5 |
| 0.20 | — | 2.7 | 4.7 | 5.8 | 7.5 | 9.3 | 10.6 |
| 0.23 | 2.0 | 3.1 | 5.4 | 6.6 | 8.6 | 10.7 | 12.2 |
| 0.26 | 2.3 | 3.5 | 6.1 | 7.5 | 9.7 | 12.1 | 13.8 |
| 0.28 | 2.5 | 3.8 | 6.6 | 8.1 | 10.5 | 13.0 | 14.8 |
| 0.30 | 2.6 | 4.0 | 7.0 | 8.7 | 11.2 | 14.0 | 16.0 |
| 0.32 | 2.8 | 4.3 | 7.5 | 9.2 | 12.0 | 14.9 | 17.0 |
| 0.35 | 3.1 | 4.7 | 8.3 | 10.1 | 13.1 | 16.3 | 18.6 |
| 0.37 | 3.3 | 5.0 | 8.7 | 10.7 | 13.8 | 17.2 | 19.6 |
| 0.39 | 3.4 | 5.3 | 9.2 | 11.3 | 14.6 | 18.1 | 20.7 |
| 0.41 | 3.6 | 5.5 | 9.6 | 11.8 | 15.3 | 19.1 | 21.7 |
| 0.45 | 4.0 | 6.1 | 10.6 | 13.0 | 16.8 | 20.9 | 23.9 |
| 0.50 | 4.4 | 6.8 | 11.8 | 14.5 | 18.7 | 23.2 | 26.5 |