熱軋鋼板和鋼帶(GB/T709-1988)的允許偏差
允許偏差見表1~表6。
表1熱軋鋼板和鋼帶的厚度允許偏差
| 公稱厚度/mm | 在下列寬度時的厚度允許偏差/mm | ||||||
| 600~750 | >750~1000 | >1000~1500 | >1500~2000 | ||||
| 較高精度 | 普通精度 | 較高精度 | 普通精度 | 較高精度 | 普通精度 | 較高精度 | |
| >O.35~O.50 | ±0.05 | ±0.07 | ±O.05 | ±O.07 | - | - | - |
| >0.50~O.60 | ±O.06 | ±0.08 | ±O.06 | ±O.08 | - | - | - |
| >O.60~0.75 | ±0.07 | ±0.09 | ±O.07 | ±0.09 | - | - | - |
| >0.75~O.90 | ±O.08 | ±O.10 | ±O.08 | ±O.10 | - | - | - |
| >O.90~1.10 | 土O.09 | ±O.10 | ±O.09 | ±O.12 | - | - | - |
| >1.10~1.20 | ±0.10 | ±O.12 | ±O.11 | 士O.13 | ±O.1l | ±O.15 | - |
| >1.20~1.30 | 士O.11 | ±0.13 | 士O.12 | ±O.14 | ±O.12 | ±O.15 | - |
| >1.30~1.40 | ±0.11 | 士O.14 | ±0.12 | 士O.15 | ±0.12 | ±0.18 | - |
| >1.40~1.60 | ±O.12 | ±0.15 | ±O.13 | ±O.15 | ±O.13 | 士0.18 | - |
| >1.60~1.80 | ±0.13 | ±0.15 | ±0.14 | ±0.17 | ±O.14 | ±O.18 | - |
| >1.80~2.00 | ±O.14 | ±O.16 | ±O.15 | ±O.17 | ±0.16 | 士0.18 | ±O.17 |
| >2.00~2.20 | ±O.15 | ±O.17 | ±0.16 | ±0.18 | 土0.17 | ±O.19 | ±0.18 |
| >2.20~2.50 | ±0.16 | ±O.18 | 士O.17 | ±O.19 | ±O.18 | ±0.20 | ±O.19 |
| >2.50~3.00 | ±0.17 | 士O.19 | ±O.18 | ±O.20 | 士O.19 | ±O.21 | ±O.20 |
| >3.00~3.50 | ±0.18 | ±0.20 | ±O.19 | ±O.2l | ±O.20 | ±0.22 | ±O.22 |
| >3.50~4.00 | ±0.21 | ±0.23 | ±O.22 | ±O.26 | ±O.24 | ±O.28 | ±O.26 |
| >4.00~5.50 | +O.10-O.30 | +O.20-0.40 | +O.15-O.30 | +O.30-0.40 | +O.10-0.40 | +O.30-O.50 | +O.20-O.40 |
| >5.50~7.50 | +O.10-O.40 | +O.20-0.50 | +0.10-0.50 | +O.20-0.60 | +0.10-O.50 | +O.25-0.60 | +O.20-O.50 |
| >7.50~10.00 | +O.10-0.70 | +O.20-O.80 | +O.10-O.70 | +O.20-O.80 | +O.20-O.70 | +O.30-0.80 | +O.20-O.70 |
| >lO.00~13.00 | +O.10-O.70 | +O.20-O.80 | +O.10-O.70 | +0.20-O.80 | +0.20-0.70 | +O.30-O.80 | +O.30-0.70 |
| >0.35~0.50 | - | - | - | - | - | - | - |
| >O.50~0.60 | - | - | - | - | - | - | - |
| >0.60~O.75 | - | - | - | - | - | - | - |
| >0.75~O.90 | - | - | - | - | - | - | - |
| >1.10~1.20 | - | - | - | - | - | - | - |
| >1.20~1.30 | - | - | - | - | - | - | - |
| >1.30~1.40 | - | - | - | - | - | - | - |
| >1.40~1.60 | - | - | - | - | - | - | - |
| >1.60~1.80 | - | - | - | - | - | - | - |
| >1.80~2.00 | ±O.20 | - | - | - | - | - | - |
| >2.00~2.20 | ±0.20 | - | - | - | - | - | - |
| >2.20~2.50 | 士O.21 | - | - | - | - | - | - |
| >2.50~3.00 | ±O.22 | ±O.23 | ±O.25 | - | - | - | - |
| >3.00~3.50 | ±O.24 | ±0.26 | ±0.29 | - | - | - | - |
| >3.50~4.00 | ±O.28 | ±0.30 | ±O.33 | - | - | - | - |
| >4.00~5.50 | +O.40-0.50 | +0.25-0.40 | +O.45-O.50 | - | - | - | - |
| >5.50~7.50 | +0.40-0.60 | +0.25-O.60 | +O.45-0.60 | - | - | - | - |
| >7.50~lO.00 | +O.35-O.80 | +O.25-0.70 | +O.45-O.80 | - | +O.60-0.80 | - | - |
| >10.00~13.00 | +O.40-0.80 | +0.35-0.70 | +0.50-0.80 | - | +0.70-O.80 | - | +1.00-O.80 |
| 公稱厚度(鋼板或鋼帶)/mm | 負偏差/mm | 下列寬度的厚度允許正偏差/mm | ||||||
| >1000~1200 | >1200~1500 | >1500~1700 | >1700~1800 | >1800~2000 | >2000~2300 | >2300~2500 | ||
| >13~25 | 0.8 | 0.2 | 0.2 | O.3 | 0.4 | O.6 | 0.8 | O.8 |
| >25~130 | O.9 | 0.2 | 0.2 | 0.3 | 0.4 | O.6 | O.8 | 0.9 |
| >30~34 | 1.O | O.2 | O.3 | O.3 | 0.4 | 0.6 | 0.8 | 0.9 |
| >34~40 | 1.1 | O.3 | 0.4 | O.5 | 0.6 | 0.7 | 0.9 | 1.O |
| >40~50 | 1.2 | 0.4 | 0.5 | O.6 | 0.7 | 0.8 | 1.0 | 1.1 |
| >50~60 | 1.3 | O.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.1 | 1.1 |
| >60~80 | 1.8 | - | - | 1.0 | 1.O | 1.0 | 1.0 | 1.1 |
| >80~100 | 2.0 | - | - | 1.2 | 1.2 | 1.2 | 1.2 | 1.3 |
| >l00~150 | 2.2 | - | - | 1.3 | 1.3 | 1.3 | 1.4 | 1.5 |
| >150~200 | 2.6 | - | - | 1.5 | 1.5 | 1.5 | 1.6 | 1.7 |
| 公稱厚度(鋼板或鋼帶)/mm | 下列寬度的厚度允許正偏差/mm | ||||||
| >2500~2600 | >2600~2800 | >2800~3000 | >3000~3200 | >3200~3400 | >3400~3600 | >3600~3800 | |
| >13~25 | 1.0 | 1.1 | 1.2 | - | - | - | - |
| >25~30 | 1.O | 1.1 | 1.2 | - | - | - | - |
| >30~34 | 1.0 | 1.2 | 1.3 | - | - | - | - |
| >34~40 | 1.1 | 1.3 | 1.4 | - | - | - | - |
| >40~50 | 1.2 | 1.4 | 1.5 | - | - | - | - |
| >50~60 | 1.2 | 1.3 | 1.5 | - | - | - | - |
| >60~80 | 1.2 | l.3 | 1.3 | 1.3 | 1.3 | 1.4 | I.4 |
| >80~l00 | 1.3 | 1.3 | 1.4 | 1.4 | 1.4 | l.4 | 1.4 |
| >100~150 | 1.5 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 |
| >150~200 | 1.7 | 1.7 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 |
表2切邊鋼板的寬度允許偏差
| 公稱厚度/mm | ≤4 | >4~16 | >16~60 | >60 | ||
| 寬度/mm | ≤800 | >800 | ≤1500 | >1500 | 所有寬度 | 所有寬度 |
| 寬度允許偏差/mm | +6 | +10 | +lO | +15 | +30 | +35 |
表3鋼帶的寬度允許偏差
| 切邊鋼帶 | 不切邊鋼帶 | ||
| 鋼帶寬度/mm | 寬度允許偏差/mm | 鋼帶寬度/mm | 寬度允許偏差/mm |
| 680~1000 | +5 | ≤1000 | +20 |
| >1000 | +lO | >18(D | +30 |
表4縱剪鋼帶的寬度允許偏差
| 公稱寬度/mm | 在下列厚度時的寬度允許偏差/mm | |||
| ≤4.0 | >4.O~6.0 | >6.0~8.0 | >8.O | |
| ≤160 | ±O.5 | ±O.8 | ±1.O | ±1.2 |
| >160~250 | ±O.5 | ±1.O | ±1.2 | 土1.4 |
| >250~600 | ±1.O | ±1.0 | ±1.2 | ±1.4 |
表5熱軋鋼板的長度允許偏差
| 公稱厚度/mm | ≤4 | >4~16 | >16~60 | >60 | |||||
| 鋼板長度/mm | ≤1500 | >1500 | ≤2000 | >2000~6000 | >6000 | ≤2000 | >2000~6000 | >6000 | 所有長度 |
| 長度允許偏差/mm | +10 | +15 | +10 | +25 | +30 | +15 | +30 | +40 | +50 |
表6熱軋鋼板和鋼帶的外形
| 鋼板的平面度 | 鋼帶的鐮刀彎 | |||||
| 公稱厚度/mm | ≤1.5 | >1.5~4 | >4~lO | >10~25 | >25 | 每m不得大于3mm |
| 平面度/(mm/m) | 15 | 12 | 10 | 8 | 7 | |
注:表中規(guī)定的平面度只適用于屈服點下限值不超過460MPa的鋼板,屈服點超過的以及進行調(diào)質(zhì)的鋼板,其平面度最大值為表內(nèi)規(guī)定的1.5倍。
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