收藏词条 编辑词条 热轧钢板和钢带(GB/T709-1988)的允许偏差
热轧钢板和钢带(GB/T709-1988)的允许偏差
允许偏差见表1~表6。
表1 热轧钢板和钢带的厚度允许偏差
公称厚度/mm |
在下列宽度时的厚度允许偏差/mm |
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600~750 |
>750~1000 |
>1000~1500 |
>1500~2000 |
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较高精度 |
普通精度 |
较高精度 |
普通精度 |
较高精度 |
普通精度 |
较高精度 |
|
>O.35~O.50 |
±0.05 |
±0.07 |
±O.05 |
±O.07 |
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>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 |
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>O.50~0.60 |
|||||||
>0.60~O.75 |
|||||||
>0.75~O.90 |
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>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 |
公称厚度(钢板或钢带)/mm |
负偏差/mm |
下列宽度的厚度允许正偏差/mm |
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>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 |
公称厚度(钢板或钢带)/mm |
下列宽度的厚度允许正偏差/mm |
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>2500~ 2600 |
>2600~ 2800 |
>2800~ 3000 |
>3000~ 3200 |
>3200~ 3400 |
>3400~ 3600 |
>3600~3800 |
|
>13~25 |
1.0 |
1.1 |
1.2 |
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>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 切边钢板的宽度允许偏差
公称厚度/mm |
≤4 |
>4~16 |
>16~60 |
>60 |
||
宽度/mm |
≤800 |
>800 |
≤1500 |
>1500 |
所有宽度 |
所有宽度 |
宽度允许偏差/mm |
+6 |
+10 |
+lO |
+15 |
+30 |
+35 |
表3 钢带的宽度允许偏差
切边钢带 |
不切边钢带 |
||
钢带宽度/mm |
宽度允许偏差/mm |
钢带宽度/mm |
宽度允许偏差/mm |
680~1000 |
+5 |
≤1000 |
+20 |
>1000 |
+lO |
>18(D |
+30 |
表4 纵剪钢带的宽度允许偏差
公称宽度/mm |
在下列厚度时的宽度允许偏差/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 热轧钢板的长度允许偏差
公称厚度/mm |
≤4 |
>4~16 |
>16~60 |
>60 |
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钢板长度/mm |
≤1500 |
>1500 |
≤2000 |
>2000 ~6000 |
>6000 |
≤2000 |
>2000 ~6000 |
>6000 |
所有长度 |
长度允许偏差/mm |
+10 |
+15 |
+10 |
+25 |
+30 |
+15 |
+30 |
+40 |
+50 |
表6 热轧钢板和钢带的外形
钢板的平面度 |
钢带的镰刀弯 |
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公称厚度/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:表中规定的平面度只适用于屈服点下限值不超过460MPa的钢板,屈服点超过的以及进行调质的钢板,其平面度最大值为表内规定的1.5倍。