| 处理时长 Heat treat time (h) | 分级标准 Grade scale | 耐热级数 HRG | 热感类型 Thermal type |
|---|---|---|---|
| 16 | 1.00≥SR≥0.75 | 1 | 极耐热Highly heat tolerance |
| 0.50≤SR<0.75 | 2 | 极耐热Highly heat tolerance | |
| 0.25≤SR<0.50 | 3 | 极耐热Highly heat tolerance | |
| 0.00≤SR<0.25 | 4 | 中等耐热Medium heat tolerance | |
| 12 | 1.00≥SR≥0.75 | 5 | 中等耐热Medium heat tolerance |
| 0.50≤SR<0.75 | 6 | 中等耐热Medium heat tolerance | |
| 0.25≤SR<0.50 | 7 | 中等热敏感Medium heat sensitive | |
| 0.00≤SR<0.25 | 8 | 中等热敏感Medium heat sensitive | |
| 8 | 1.00≥SR≥0.75 | 9 | 中等热敏感Medium heat sensitive |
| 0.50≤SR<0.75 | 10 | 极热敏感Highly heat sensitive | |
| 0.25≤SR<0.50 | 11 | 极热敏感Highly heat sensitive | |
| 0.00≤SR<0.25 | 12 | 极热敏感Highly heat sensitive |
