材料
|
圆孔直径
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方孔边长
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长方孔
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长圆孔
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短边(径)长
|
||||
钢:σb>686MPa
|
1.5t
|
1.3t
|
1.2t
|
1.1t
|
σb=490~686MPa
|
1.3t
|
1.2t
|
1.0t
|
0.9t
|
σb<490MPa
|
1.0t
|
0.9t
|
0.8t
|
0.7t
|
黄铜、铜
|
0.9t
|
0.8t
|
0.7t
|
0.6t
|
铝、锌
|
0.8t
|
0.7t
|
0.6t
|
0.5t
|
胶木、胶布板
|
0.7t
|
0.6t
|
0.5t
|
0.4t
|
纸板
|
0.6t
|
0.5t
|
0.4t
|
0.3t
|