热轧圆钢和方钢的尺寸允许偏差 ( 摘自 GB / T 702 — 1986 )
|
d , a / mm |
精 度 组 别 |
||
|
1 组 |
2 组 |
3 组 |
|
|
允 许 偏 差 / mm |
|||
|
5 . 5 ~ 7 |
± 0 . 20 |
± 0 . 30 |
± 0 . 40 |
|
> 7 ~ 20 |
± 0 . 25 |
± 0 . 35 |
± 0 . 40 |
|
> 20 ~ 30 |
± 0 . 30 |
± 0 . 40 |
± 0 . 50 |
|
> 30 ~ 50 |
± 0 . 40 |
± 0 . 50 |
± 0 . 60 |
|
> 50 ~ 80 |
± 0 . 60 |
± 0 . 70 |
± 0 . 80 |
|
> 80 ~ 110 |
± 0 . 90 |
± 1 . 0 |
± 1 . 1 |
|
> 110 ~ 150 |
± 0 . 1 . 2 |
± 1 . 3 |
± 1 . 4 |
|
> 150 ~ 190 |
— |
— |
± 2 . 0 |
|
> 190 ~ 250 |
— |
— |
± 2 . 5 |
