公差:標準中規定的正、負偏差值絕對值之和叫做公差,亦叫"公差帶",大多用於鋼板的厚度上,而國內大多執行N類公差,B類相對來說要求比較嚴一些,多用於ASTM美標中。
基本介紹
- 中文名:B類公差
- 套用:ASTM標準中的單軋鋼板厚度上
- 相關公差:有A類公差,C類,N類等
單軋鋼板的厚度允許偏差(B類)
公稱厚度 | 下列公稱寬度的厚度允許偏差 -單位為毫米 | |||||||
≤1500 | >1500~2500 | >2500~4000 | >4000~4800 | |||||
3.00-5.00 | -0.30 | +0.60 | -0.30 | +0.80 | -0.30 | +1.00 | ||
>5.00~8.00 | +0.70 | +0.90 | +1.20 | |||||
>8.00~15.0 | +0.80 | +1.00 | +1.30 | -0.30 | +1.50 | |||
>15.0~25.0 | +1.00 | +1.20 | +1.50 | +1.90 | ||||
>25.0~40.0 | +1.10 | +1.30 | +1.70 | +2.10 | ||||
>40.0~50.0 | +1.30 | +1.50 | +1.90 | +2.30 | ||||
>60.0~100 | +1.50 | +1.80 | +2.30 | +2.70 | ||||
>100~150 | +2.10 | +2.50 | +2.90 | +3.30 | ||||
>150~200 | +2.50 | +2.90 | +3.30 | +3.50 | ||||
>200~250 | +2.90 | +3.30 | +3.70 | +4.10 | ||||
>250~300 | +3.30 | +3.70 | +4.10 | +4.50 | ||||
>300~400 | +3.70 | +4.10 | +4.50 | +4.90 |