表格中規定的底孔直徑是根據以下條件确定的:上半部分通孔、下半部分底孔的簡單自攻螺釘連接;鑽底孔;表面硬化自攻螺釘且無塗鍍層;MS≤0.5×MB。
表1 ST2.2的底孔直徑
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
0.8 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 |
0.9 | |||||||||
1.0 | 1.8 | ||||||||
1.1 | 1.8 | ||||||||
1.2 | 1.8 | ||||||||
1.3 | 1.8 | ||||||||
1.4 | 1.9 | ||||||||
1.5 | 1.8 | 1.9 | |||||||
1.6 | 1.8 | 1.9 | |||||||
1.7 | 1.9 | ||||||||
1.8 | 1.8 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
0.8 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 |
0.9 | |||||||||
1.0 | 1.8 | ||||||||
1.1 | 1.8 | ||||||||
1.2 | 1.8 | ||||||||
1.3 | 1.8 | ||||||||
1.4 | 1.9 | ||||||||
1.5 | 1.8 | 1.9 | |||||||
1.6 | 1.8 | 1.9 | |||||||
1.7 | 1.9 | ||||||||
1.8 | 1.8 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
1.3 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.7 | 2.7 | 2.8 |
1.4 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.8 | ||
1.5 | 2.8 | 2.9 | |||||||
1.6 | 2.9 | ||||||||
1.7 | 2.8 | ||||||||
1.8 | 2.8 | 2.9 | |||||||
1.9 | 2.9 | 3.0 | |||||||
2.0 | 2.8 | 2.9 | 3.0 | ||||||
2.2 | 2.8 | 3.0 | 3.0 | ||||||
2.5 | 2.9 | 2.9 | 3.0 | 3.1 | 3.1 | ||||
2.8 | 2.8 | 3.0 | 3.1 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
1.3 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 3.0 | 3.0 | 3.1 |
1.4 | 3.0 | 3.1 | 3.1 | ||||||
1.5 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.2 | |||
1.6 | 3.1 | 3.2 | |||||||
1.7 | 3.1 | 3.2 | 3.3 | ||||||
1.8 | 3.2 | 3.3 | |||||||
1.9 | 3.1 | 3.2 | 3.3 | ||||||
2.0 | |||||||||
2.2 | 3.1 | 3.2 | 3.3 | 3.4 | |||||
2.5 | 3.2 | 3.3 | 3.3 | 3.4 | 3.4 | ||||
2.8 | 3.2 | 3.3 | 3.4 | 3.4 | |||||
3.0 | 3.5 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
1.4 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.2 | 3.3 | 3.4 |
1.5 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | |||
1.6 | 3.3 | 3.4 | |||||||
1.7 | 3.3 | ||||||||
1.8 | 3.3 | 3.4 | 3.5 | ||||||
1.9 | 3.4 | ||||||||
2.0 | 3.3 | 3.4 | 3.5 | 3.5 | |||||
2.2 | 3.5 | 3.6 | |||||||
2.5 | 3.4 | 3.4 | 3.5 | 3.6 | 3.6 | ||||
2.8 | 3.3 | 3.5 | 3.6 | 3.6 | |||||
3.0 | 3.4 | 3.5 | 3.7 | ||||||
3.5 | 3.3 | 3.5 | 3.6 | 3.6 | 3.7 | 3.7 | 3.7 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
1.6 | 3.6 | 3.6 | 3.6 | 3.6 | 3.6 | 3.7 | 3.8 | 3.9 | 3.9 |
1.7 | 3.7 | 3.8 | 3.9 | 4.0 | |||||
1.8 | 3.8 | 4.0 | |||||||
1.9 | 3.7 | 3.9 | |||||||
2.0 | 3.8 | 3.9 | 4.0 | 4.1 | |||||
2.2 | 3.7 | 3.9 | 4.0 | 4.1 | |||||
2.5 | 3.7 | 3.9 | 4.0 | 4.0 | 4.1 | 4.1 | 4.2 | ||
2.8 | 3.8 | 4.0 | 4.1 | 4.2 | 4.2 | ||||
3.0 | 3.7 | 3.9 | 4.1 | 4.2 | |||||
3.5 | 3.8 | 4.0 | 4.1 | 4.2 | 4.2 | 4.3 | |||
4.0 | 4.0 | 4.1 | 4.2 | 4.3 | 4.3 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
1.8 | 4.2 | 4.2 | 4.2 | 4.2 | 4.3 | 4.4 | 4.5 | 4.6 | 4.6 |
1.9 | 4.4 | 4.5 | 4.6 | 4.7 | |||||
2.0 | 4.3 | ||||||||
2.2 | 4.3 | 4.4 | 4.5 | 4.6 | 4.7 | 4.7 | 4.8 | ||
2.5 | 4.4 | 4.6 | 4.7 | 4.7 | 4.8 | 4.8 | |||
2.8 | 4.4 | 4.6 | 4.7 | 4.8 | 4.9 | ||||
3.0 | 4.5 | 4.8 | 4.9 | ||||||
3.5 | 4.4 | 4.6 | 4.7 | 4.8 | 4.9 | 4.9 | |||
4.0 | 4.6 | 4.7 | 4.8 | 4.9 | 4.9 | 5.0 | 5.0 | ||
4.5 | 4.7 | 4.8 | 4.9 | 5.0 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
1.8 | 4.9 | 4.9 | 4.9 | 4.9 | 5.0 | 5.2 | 5.3 | 5.3 | 5.4 |
1.9 | 5.0 | 5.1 | 5.4 | ||||||
2.0 | 5.1 | 5.2 | 5.3 | 5.4 | 5.5 | ||||
2.2 | 5.0 | 5.2 | 5.3 | 5.4 | 5.5 | 5.5 | 5.6 | ||
2.5 | 5.0 | 5.2 | 5.4 | 5.4 | 5.5 | 5.6 | 5.6 | ||
2.8 | 5.2 | 5.3 | 5.5 | 5.5 | 5.6 | 5.7 | 5.7 | ||
3.0 | 5.3 | 5.4 | 5.5 | 5.6 | 5.7 | ||||
3.5 | 5.2 | 5.4 | 5.5 | 5.6 | 5.7 | 5.7 | 5.8 | ||
4.0 | 5.3 | 5.5 | 5.6 | 5.7 | 5.8 | 5.8 | |||
4.5 | 5.5 | 5.6 | 5.7 | 5.8 | 5.8 | ||||
5.0 | 5.7 | 5.8 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
2.1 | 6.3 | 6.3 | 6.3 | 6.3 | 6.5 | 6.6 | 6.7 | 6.8 | 6.9 |
2.2 | 6.5 | 6.6 | 6.8 | 6.8 | 6.9 | 7.0 | |||
2.5 | 6.5 | 6.7 | 6.8 | 6.9 | 7.0 | 7.0 | 7.1 | ||
2.8 | 6.4 | 6.7 | 6.8 | 6.9 | 7.0 | 7.1 | 7.1 | 7.2 | |
3.0 | 6.5 | 6.8 | 6.9 | 7.0 | 7.1 | 7.2 | |||
3.5 | 6.4 | 6.8 | 7.0 | 7.1 | 7.1 | 7.2 | 7.2 | 7.3 | 7.3 |
4.0 | 6.7 | 6.9 | 7.1 | 7.2 | 7.2 | 7.3 | 7.3 | ||
4.5 | 6.8 | 7.1 | 7.2 | 7.3 | 7.4 | ||||
5.0 | 7.0 | 7.3 | 7.4 | 7.4 | |||||
5.5 | 7.1 | 7.2 | 7.3 | 7.4 | |||||
6.0 | 7.4 | ||||||||
6.5 | 7.2 | 7.3 | 7.4 |
鋼闆厚度 | 底孔直徑 d/mm | ||||||||
材料最小拉伸強度Rm (Mpa) | |||||||||
100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | |
2.5 | 7.5 | 7.5 | 7.7 | 8.0 | 8.1 | 8.2 | 8.3 | 8.3 | 8.4 |
2.8 | 7.6 | 8.0 | 8.1 | 8.2 | 8.3 | 8.4 | 8.4 | 8.6 | |
3.0 | 7.7 | 8.1 | 8.2 | 8.3 | 8.4 | 8.6 | |||
3.5 | 7.6 | 8.1 | 8.3 | 8.4 | 8.4 | 8.6 | 8.6 | 8.7 | 8.7 |
4.0 | 8.0 | 8.2 | 8.4 | 8.6 | 8.6 | 8.7 | 8.7 | ||
4.5 | 8.1 | 8.4 | 8.6 | 8.7 | 8.8 | ||||
5.0 | 8.3 | 8.7 | 8.8 | 8.8 | |||||
5.5 | 8.4 | 8.6 | 8.7 | 8.8 | |||||
6.0 | 8.8 | ||||||||
6.5 | 8.6 | 8.7 | 8.8 | ||||||
7.0 | 8.8 | 8.9 | 8.9 | 8.9 | 8.9 | ||||
7.5 | 8.7 | 8.9 |
用于計算通孔直徑dD的公式:dD=d1+1/3(d1-d)。
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