随着现代社会的飞速发展，铝合金型材因其具有高强度、耐腐蚀性、耐磨、耐热以及抗压力性，被广泛应用于航天航空、机械制造、船舶制造、建筑行业以及生活用品等各个领域，在应用的过程中，根据不同的应用范围设置了不同的国家标准，这个标准是允许有偏差的，具体偏差如下表所示。
铝及铝合金型材厚度及允许偏差GB/T3194-1982
|
厚度/mm |
标准宽度/mm |
理论质量/kg/m²（2.85） |
||||||||||||||||||||
|
400-600 |
800 |
1000 |
1200 |
1500 |
1600 |
1800 |
2000 |
2200 |
2400 |
2500 |
||||||||||||
|
厚度允许偏差/mm |
||||||||||||||||||||||
|
0.3 |
-0.05 |
-0.08 |
±0.05 |
±0.06 |
- |
- |
- |
- |
- |
- |
- |
0.855 |
||||||||||
|
0.4 |
-0.05 |
-0.08 |
±0.05 |
±0.06 |
- |
- |
- |
- |
- |
- |
- |
1.140 |
||||||||||
|
0.5 |
-0.05 |
-0.08 |
-0.10 |
-0.12 |
-0.13 |
- |
- |
- |
- |
- |
- |
1.142 |
||||||||||
|
0.6 |
-0.05 |
-0.10 |
-0.12 |
-0.12 |
-0.14 |
-0.14 |
- |
- |
- |
- |
- |
1.710 |
||||||||||
|
0.7 |
-0.07 |
-0.10 |
-0.12 |
-0.13 |
-0.14 |
-0.14 |
- |
- |
- |
- |
- |
1.995 |
||||||||||
|
0.8 |
-0.08 |
-0.12 |
-0.12 |
-0.13 |
-0.14 |
-0.14 |
-0.18 |
- |
- |
- |
- |
2.280 |
||||||||||
|
0.9 |
-0.09 |
-0.13 |
-0.14 |
-0.15 |
-0.16 |
-0.17 |
-0.19 |
- |
- |
- |
- |
2.565 |
||||||||||
|
1.0 |
-0.10 |
-0.15 |
-0.15 |
-0.16 |
-0.17 |
-0.17 |
-0.20 |
-0.20 |
- |
- |
- |
2.850 |
||||||||||
|
1.2 |
-0.10 |
-0.15 |
-0.15 |
-0.16 |
-0.17 |
-0.17 |
-0.20 |
-0.22 |
- |
- |
- |
3.420 |
||||||||||
|
1.5 |
-0.15 |
-0.20 |
-0.20 |
-0.22 |
-0.25 |
-0.25 |
-0.27 |
-0.27 |
-0.29 |
- |
- |
4.275 |
||||||||||
|
1.8 |
-0.15 |
-0.20 |
-0.20 |
-0.22 |
-0.25 |
-0.25 |
-0.27 |
-0.27 |
-0.29 |
-0.30 |
- |
5.130 |
||||||||||
|
2.0 |
-0.15 |
-0.20 |
-0.20 |
-0.24 |
-0.26 |
-0.26 |
-0.28 |
-0.28 |
-0.30 |
-0.30 |
- |
5.700 |
||||||||||
|
2.3 |
-0.20 |
-0.22 |
-0.23 |
-0.26 |
-0.28 |
-0.28 |
-0.29 |
-0.29 |
-0.30 |
-0.30 |
- |
6.555 |
||||||||||
|
2.5 |
-0.20 |
-0.25 |
-0.25 |
-0.28 |
-0.29 |
-0.29 |
-0.30 |
-0.30 |
-0.32 |
-0.32 |
- |
7.125 |
||||||||||
|
3.0 |
-0.25 |
-0.30 |
-0.30 |
-0.33 |
-0.34 |
-0.34 |
-0.35 |
-0.35 |
-0.36 |
-0.36 |
- |
8.850 |
||||||||||
|
3.5 |
-0.25 |
-0.30 |
-0.30 |
-0.34 |
-0.35 |
-0.35 |
-0.36 |
-0.36 |
-0.37 |
-0.37 |
- |
9.975 |
||||||||||
|
4.0 |
-0.25 |
-0.30 |
-0.35 |
-0.36 |
-0.36 |
-0.36 |
-0.37 |
-0.37 |
-0.38 |
-0.38 |
- |
11.40 |
||||||||||
|
5.0 |
-0.30 |
-0.35 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
- |
14.25 |
||||||||||
|
-0.35 |
-0.36 |
-0.37 |
-0.37 |
-0.42 |
-0.42 |
-0.45 |
-0.45 |
|||||||||||||||
|
6.0 |
-0.30 |
-0.40 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
- |
17.10 |
||||||||||
|
-0.40 |
-0.41 |
-0.42 |
-0.42 |
-0.42 |
-0.42 |
-0.45 |
-0.45 |
|||||||||||||||
|
7.0 |
-0.30 |
-0.40 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
- |
-19.95 |
||||||||||
|
-0.40 |
-0.42 |
-0.43 |
-0.43 |
-0.50 |
-0.50 |
-0.50 |
-0.60 |
|||||||||||||||
|
8.0 |
-0.35 |
-0.40 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
- |
22.80 |
||||||||||
|
-0.45 |
-0.46 |
-0.47 |
-0.47 |
-0.50 |
-0.50 |
-0.60 |
-0.60 |
|||||||||||||||
|
9.0 |
-0.35 |
-0.45 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
- |
25.65 |
||||||||||
|
-0.45 |
-0.47 |
-0.48 |
-0.49 |
-0.50 |
-0.50 |
-0.60 |
-0.60 |
|||||||||||||||
|
10.0 |
-0.40 |
-0.50 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
+0.10 |
- |
28.50 |
||||||||||
|
-0.50 |
-0.50 |
-0.50 |
-0.50 |
-0.50 |
-0.50 |
-0.60 |
-0.60 |
|||||||||||||||
|
12 |
- |
- |
±0.5 |
±0.5 |
±1.0 |
±1.0 |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.5 |
34.20 |
||||||||||
|
14 |
- |
- |
±0.5 |
±0.5 |
±1.0 |
±1.0 |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.5 |
39.90 |
||||||||||
|
15 |
- |
- |
±0.5 |
±0.5 |
±1.0 |
±1.0 |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.5 |
42.75 |
||||||||||
|
16 |
- |
- |
±0.5 |
±0.5 |
±1.0 |
±1.0 |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.5 |
45.60 |
||||||||||
|
18 |
- |
- |
±0.5 |
±0.5 |
±1.0 |
±1.0 |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.5 |
51.30 |
||||||||||
|
20 |
- |
- |
±0.5 |
±0.5 |
±1.0 |
±1.0 |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.5 |
57.00 |
||||||||||
|
22 |
- |
- |
±0.75 |
±0.75 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±2.0 |
±2.0 |
±2.0 |
62.70 |
||||||||||
|
25 |
- |
- |
±0.75 |
±0.75 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±2.0 |
±2.0 |
±2.0 |
71.25 |
||||||||||
|
30 |
- |
- |
±0.75 |
±0.75 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±2.0 |
±2.0 |
±2.0 |
85.50 |
||||||||||
|
35 |
- |
- |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±2.50 |
±2.50 |
±2.50 |
99.75 |
||||||||||
|
40 |
- |
- |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±2.5 |
±2.5 |
±2.5 |
114.00 |
||||||||||
|
50 |
- |
- |
±1.5 |
±1.5 |
±2.0 |
±2.0 |
±2.0 |
±2.0 |
±3.0 |
±3.0 |
±3.0 |
142.50 |
||||||||||
|
60 |
- |
- |
±1.5 |
±1.5 |
±2.0 |
±2.0 |
±2.0 |
±2.0 |
±3.0 |
±3.0 |
±3.0 |
171.00 |
||||||||||
|
70 |
- |
- |
±3.0 |
±3.0 |
±3.5 |
±3.5 |
±3.5 |
±3.5 |
±4.0 |
±4.0 |
±4.0 |
199.50 |
||||||||||
|
80 |
- |
- |
±3.0 |
±3.0 |
±3.5 |
±3.5 |
±3.5 |
±3.5 |
±4.0 |
±4.0 |
±4.0 |
228.50 |
||||||||||
|
90 |
- |
- |
±3.5 |
±3.5 |
±5.0 |
±5.0 |
±5.0 |
±5.0 |
±5.5 |
±5.5 |
±5.5 |
256.50 |
||||||||||
|
100 |
- |
- |
±3.5 |
±3.5 |
±5.0 |
±5.0 |
±5.0 |
±5.0 |
±5.5 |
±5.5 |
±5.5 |
285.00 |
||||||||||
|
110 |
- |
- |
±3.5 |
±3.5 |
±5.0 |
±5.0 |
±5.0 |
±5.0 |
±5.5 |
±5.5 |
±5.5 |
313.50 |
||||||||||
|
120 |
- |
- |
±3.5 |
±3.5 |
±5.0 |
±5.0 |
±5.0 |
±5.0 |
±5.5 |
±5.5 |
±5.5 |
342.00 |
||||||||||
|
130 |
- |
- |
±4.0 |
±4.0 |
±5.5 |
±5.5 |
±5.5 |
±5.5 |
±6.0 |
±6.0 |
±6.0 |
370.50 |
||||||||||
|
140 |
- |
- |
±4.0 |
±4.0 |
±5.0 |
±5.5 |
±5.5 |
±5.5 |
±6.0 |
±6.0 |
±6.0 |
399.00 |
||||||||||
|
150 |
- |
- |
±4.0 |
±4.0 |
±5.5 |
±5.5 |
±5.5 |
±5.5 |
±6.0 |
±6.0 |
±6.0 |
427.50 |
||||||||||
|
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
||||||||||
注：1. 列表中的理论质量系数是按LC4/LC9 的密度2.85来计算的；
2. 本标准适用于标准铝及铝合金型材允许偏差值；非标准厚度的板材允许偏差按其相邻较小的标准厚度的偏差来执行；
3. 还有些异形铝型材，如变断面铝型材（指厚度沿板材长度方向均匀变化的板材）它的偏差范围值又不同，只要它的厚端厚度≤5mm，宽度≤1500mm时，其厚度允许偏差为±0.2mm。
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