標準硬度塊 | 示值大誤差δ/% | 示值重復(fù)性誤差Hcf/% |
≤125 | ±3 | ≤3.5 |
125<HBW≤225 | ±2.5 | ≤3.0 |
>225 | ±2 | ≤2.5 |