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强度区分 |
4.8 |
6.8 |
8.8 |
12.9 |
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最小破断强度 |
392Mpa |
588Mpa |
784Mpa |
1176Mpa |
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材质 |
一般构造用钢 |
机械制造用钢 |
鉻钼合金钢 |
镍鉻钼合金钢 |
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螺栓 |
螺母 |
扭矩值 |
扭矩值 |
扭矩值 |
扭矩值 |
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KGM |
NM |
KGM |
NM |
KGM |
NM |
KGM |
NM |
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M14 |
22mm |
7 |
69 |
10 |
98 |
14 |
137 |
23 |
225 |
M16 |
24mm |
10 |
98 |
14 |
137 |
21 |
206 |
36 |
353 |
M18 |
27mm |
14 |
137 |
21 |
206 |
29 |
284 |
49 |
480 |
M20 |
30mm |
18 |
176 |
28 |
296 |
41 |
402 |
69 |
676 |
M22 |
32mm |
23 |
225 |
34 |
333 |
55 |
539 |
93 |
911 |
M24 |
36mm |
32 |
314 |
48 |
470 |
70 |
686 |
120 |
1176 |
M27 |
41mm |
45 |
441 |
65 |
630 |
105 |
1029 |
180 |
1764 |
M30 |
46 |
60 |
588 |
90 |
882 |
125 |
1225 |
240 |
2352 |
M33 |
50mm |
75 |
735 |
115 |
1127 |
150 |
1470 |
250 |
2450 |
M36 |
55mm |
100 |
980 |
150 |
1470 |
180 |
1764 |
300 |
2940 |
M39 |
60mm |
120 |
1176 |
180 |
1764 |
220 |
2156 |
370 |
3626 |
M42 |
65mm |
155 |
1519 |
240 |
2352 |
280 |
2744 |
470 |
4606 |
M45 |
70mm |
180 |
1764 |
280 |
2744 |
320 |
3136 |
550 |
5390 |
M48 |
75mm |
230 |
2254 |
350 |
3430 |
400 |
3920 |
680 |
6664 |
M52 |
80mm |
280 |
2744 |
420 |
4116 |
480 |
4704 |
850 |
8330 |
M56 |
85mm |
360 |
3528 |
530 |
5194 |
610 |
5978 |
1050 |
10290 |
M60 |
90mm |
410 |
4018 |
610 |
5978 |
790 |
7742 |
1350 |
13230 |
M64 |
95mm |
510 |
4998 |
760 |
77448 |
900 |
8820 |
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M68 |
100mm |
580 |
5684 |
870 |
8526 |
1100 |
10780 |
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M72 |
105mm |
660 |
6468 |
1000 |
9800 |
1290 |
12642 |
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M76 |
110mm |
750 |
7350 |
1100 |
10780 |
1500 |
14700 |
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M80 |
115mm |
830 |
8134 |
1250 |
12250 |
1850 |
18130 |
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M85 |
120mm |
900 |
8820 |
1400 |
13720 |
2250 |
22050 |
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M90 |
130 |
1080 |
10584 |
1650 |
16170 |
2500 |
24500 |
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M100 |
145mm |
1400 |
13720 |
2050 |
20090 |
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M110 |
155mm |
1670 |
16366 |
2550 |
24990 |
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M120 |
175mm |
2030 |
19894 |
3050 |
29890 |
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以上是德国工业标准，表中扭矩值为螺栓达到屈服极限的70%时所测定.
建议锁紧力矩为:表中数据X(70-80)%.
例如:M48,8.8级螺栓,则锁紧力矩为:400X80%=320（Kg-m）
