螺栓等级以及锁紧力矩
本帖最后由 ~幻~ 于 2016-9-23 08:59 编辑螺栓的等级以及锁紧力矩一、螺栓的性能等级 钢结构连接用螺栓性能等级分3.6、4.6、4.8、5.6、6.8、8.8、9.8、10.9、12.9等10余个等级，其中8.8级及以上螺栓材质为低碳合金钢或中碳钢并经热处理（淬火、回火），通称为高强度螺栓，其余通称为普通螺栓。 螺栓性能等级标号有两部分数字组成，分别表示螺栓材料的公称抗拉强度值和屈强比值。 例如，性能等级4.6级的螺栓，其含义是： 1、螺栓材质公称抗拉强度达400MPa级； 2、螺栓材质的屈强比值为0.6； 3、螺栓材质的公称屈服强度达400×0.6=240MPa级 。 性能等级10.9级高强度螺栓，含义是：1、螺栓材质公称抗拉强度达1000MPa级； 2、螺栓材质的屈强比值为0.9； 3、螺栓材质的公称屈服强度达1000×0.9=900MPa级 。 螺栓性能等级的含义是国际通用的标准，相同性能等级的螺栓，不管其材料和产地的区别，其性能是相同的，设计上只选用性能等级即可 拧紧扭矩M=KFd 式中：M－拧紧扭矩，Nm；K－拧紧扭矩系数；F－拧紧力kN；d－螺纹直径，mm。
内六角 外六角 螺栓直径 螺栓强度等级
螺栓 螺栓 3.6 5.6 6.9 8.8 10.9 12.9
S(mm) S(mm) M(mm) Fv(N) Ma（Nm） Fv(N) Ma（Nm） Fv(N) Ma（Nm） Fv(N) Ma（Nm） Fv(N) Ma（Nm） Fv(N) Ma（Nm）
1.5 4 M2 255 0.1 345 0.15 710 0.3 835 0.35 1,170 0.5 1,415 0.6
2 5 M2.5 485 0.26 655 0.35 1,310 0.71 1,550 0.83 2,180 1.18 2,620 1.4
2.25 5.5 M3 630 0.37 1,050 0.62 1,700 0.99 2,250 1.3 3,150 1.9 3,800 2.2
6 M3.5 850 0.57 1,400 0.95 2,250 1.5 3,000 2 4,250 2.9 5,100 3.4
3 7 M4 1,100 0.85 1,850 1.4 2,900 2.3 3,900 3 5,750 4.4 6,700 5.1
4 8、9 M5 1,800 1.7 3,000 2.8 4,800 4.5 6,400 5.9 9,400 8.7 11,000 10
5 10 M6 2,550 2.9 4,200 4.8 6,750 7.7 9,000 10 13,200 15 15,500 18
6 13、14 M8 4,650 7 7,750 12 12,400 19 16,500 25 24,300 36 28,400 43
8 15、17 M10 7,400 14 12,300 23 19,700 37 26,300 49 38,700 72 45,200 84
10 19、21 M12 10,800 24 18,000 40 28,800 65 38,400 85 56,500 125 66,000 145
12 22、23 M14 14,800 39 24,700 64 39,500 105 52,500 135 77,500 200 90,500 235
14 24、26 M16 20,400 59 34,000 98 54,500 155 72,500 210 107,000 310 125,000 365
27 M18 24,800 81 41,300 135 66,000 215 91,000 300 129,000 430 152,000 500
17 30 M20 31,900 115 53,000 190 85,000 305 117,000 425 166,000 610 195,000 710
32 M22 39,900 155 66,500 260 106,000 415 146,000 580 208,000 820 244,000 960
19 36 M24 45,900 200 76,500 330 122,000 530 168,000 730 240,000 1,050 281,000 1,220
41 M27 80,500 295 100,000 490 161,000 780 222,000 1,100 316,000 1,550 369,000 1,800
22 46 M30 73,500 395 122,000 660 196,000 1,050 269,000 1,450 384,000 2,100 449,000 2,450
50 M33 91,500 540 153,000 900 244,000 1,450 326,000 1,900 458,000 2,700 550,000 3,250
27 55 M36 107,000 690 179,000 1,150 287,000 1,850 382,000 2,450 537,000 3,450 645,000 4,150
60 M39 129,000 900 215,000 1,500 345,000 2,400 460,000 3,200 646,000 4,500 775,000 5,400
32 65 M42 148,000 1,100 247,000 1,850 395,000 2,950 526,000 3,950 740,000 5,550 888,000 6,650
70 M45 173,000 1,400 289,000 2,300 462,000 3,700 616,000 4,950 867,000 6,950 1,050,000 8,350
36 75 M48 195,000 1,700 325,000 2,800 520,000 4,450 693,000 5,950 974,000 8,400 1,150,000, 10,100
80 M52 234,000 2,150 390,000 3,600 624,000 5,750 832,000 7,650 1,169,000 10,800 1,403,000 12,900
41 85 M56 270,000 2,700 450,000 4,500 719,000 7,150 959,000 9,550 1,349,000 13,400 1,618,000 16,100
90 M60 315,000 3,350 525,000 5,550 841,000 8,900 1,121,000 11,900 1,576,000 16,700 1,892,000 20,000
46 95 M64 357,000 4,000 595,000 6,700 951,000 10,700 1,268,000 14,300 1,784,000 21,100 2,140,000 24,100
S-内六角或外六方两平行边距离 Fv-螺栓预紧力 Ma-螺栓扭矩
二、螺纹联接的拧紧力矩计算Mt＝K×P0×d×10－3 N.m
K:拧紧力系数 d：螺纹公称直径
P0：预紧力
P0＝σ0×As As也可由下面表查出
As＝π×ds2/4 ds:螺纹部分危险剖面的计算直径
ds＝（d2＋d3）/2 d3= d1－H/6H：螺纹牙的公称工作高度
σ0 ＝（0.5～0.7）σs σs――――螺栓材料的屈服极限N/mm2 （与强度等级相关，材质决定）
K值查表：(K值计算公式略)
摩擦表面状况K值
有润滑无润滑
精加工表面0.100.12
一般加工表面0.13~0.150.18~0.21
表面氧化0.200.24
镀 锌0.180.22
干燥的粗加工表面 0.26~0.3
σs查表：
螺纹性能等级
3.64.64.85.65.86.88.89.810.912.9
σs 或σ0.2N/mm2
1802403203004004806407209001080
As查表：
螺纹公称直径d/mm
33.545678101214161820222427303336
公称应力截面积As/mm2
5.036.788.7814.220.128.936.65884.3115157192245303353459561694817
通过计算得到螺栓联接拧紧力矩如下表所示：
表面被氧化（无润滑）的螺纹联接的拧紧力矩值（单位：N.m）
性能等级
3.64.64.85.65.86.88.89.810.912.9
螺纹直径d/mm
minmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax
30.330.460.430.610.580.810.540.760.721.010.871.221.161.621.301.831.632.281.962.74
3.50.510.720.680.960.911.280.851.201.141.591.371.911.822.552.052.872.563.593.084.31
40.761.061.011.421.351.891.261.771.692.362.022.832.703.783.034.253.795.314.556.37
51.532.152.042.862.733.822.563.583.414.774.095.735.457.636.138.597.6710.749.2012.88
62.603.653.474.864.636.484.346.085.798.106.959.739.2612.9710.4214.5913.0218.2315.6321.88
74.376.125.838.167.7710.887.2810.209.7113.5911.6516.3115.5421.7517.4824.4721.8530.5926.2236.71
86.328.858.4311.8111.2415.7410.5414.7614.0519.6816.8723.6122.4931.4825.3035.4231.6244.2737.9553.13
1012.5317.5416.7023.3922.2731.1820.8829.2327.8438.9833.4146.7744.5462.3650.1170.1662.6487.7075.17105.24
1221.8530.5929.1340.7938.8554.3836.4250.9848.5667.9858.2781.5877.69108.7787.40122.36109.25152.95131.10183.54
1434.7848.6946.3764.9261.8286.5557.9681.1477.28108.1992.74129.83123.65173.11139.10194.75173.88243.43208.66292.12
1654.2675.9672.35101.2896.46135.0590.43126.60120.58168.81144.69202.57192.92270.09217.04303.85271.30379.81325.56455.78
1874.65104.5199.53139.35132.71185.79124.42174.18165.89232.24199.07278.69265.42371.59298.60418.04373.25522.55447.90627.06
20105.84148.18141.12197.57188.16263.42176.40246.96235.20329.28282.24395.14376.32526.85423.36592.70529.20740.88635.04889.06
22143.99201.58191.98268.77255.97358.36239.98335.97319.97447.96383.96537.55511.95716.73575.94806.32719.931007.90863.911209.48
24183.00256.19243.99341.59325.32455.45304.99426.99406.66569.32487.99683.18650.65910.91731.981024.77914.981280.971097.971537.16
27267.69374.76356.92499.69475.89666.25446.15624.61594.86832.81713.84999.37951.781332.501070.761499.061338.441873.821606.132248.59
30363.53508.94484.70678.59646.27904.78605.88848.23807.841130.98969.411357.171292.541809.561454.112035.761817.642544.702181.173053.64
33494.68692.56659.58923.41879.441231.21824.471154.261099.301539.011319.161846.821758.872462.421978.732770.232473.423462.782968.104155.34
36635.30889.42847.071185.891129.421581.191058.831482.361411.781976.491694.132371.782258.843162.382541.203557.683176.504447.093811.805336.51
表面被氧化（有润滑）的螺纹联接的拧紧力矩值（单位：N.m）
性能等级
3.64.64.85.65.86.88.89.810.912.9
螺纹直径d/mm
minmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax
30.270.380.360.510.480.680.450.630.600.850.721.010.971.351.091.521.361.901.632.28
3.50.430.600.570.800.761.060.711.000.951.331.141.591.522.131.712.392.142.992.563.59
40.630.890.841.181.121.571.051.481.401.971.692.362.253.152.533.543.164.433.795.31
51.281.791.702.392.273.182.132.982.843.983.414.774.546.365.117.166.398.957.6710.74
62.173.042.894.053.865.403.625.074.826.755.798.107.7210.818.6812.1610.8515.2013.0218.23
73.645.104.866.806.479.066.078.508.0911.339.7113.5912.9518.1314.5720.3918.2125.4921.8530.59
85.277.387.039.849.3713.128.7812.3011.7116.4014.0519.6818.7426.2321.0829.5126.3536.8931.6244.27
1010.4414.6213.9219.4918.5625.9817.4024.3623.2032.4827.8438.9837.1251.9741.7658.4652.2073.0862.6487.70
1218.2125.4924.2833.9932.3745.3230.3542.4940.4656.6548.5667.9864.7490.6472.84101.9791.04127.46109.25152.95
1428.9840.5738.6454.1051.5272.1348.3067.6264.4090.1677.28108.19103.04144.26115.92162.29144.90202.86173.88243.43
1645.2263.3060.2984.4080.38112.5475.36105.50100.48140.67120.58168.81160.77225.08180.86253.21226.08316.51271.30379.81
1862.2187.0982.94116.12110.59154.83103.68145.15138.24193.54165.89232.24221.18309.66248.83348.36311.04435.46373.25522.55
2088.20123.48117.60164.64156.80219.52147.00205.80196.00274.40235.20329.28313.60439.04352.80493.92441.00617.40529.20740.88
22119.99167.98159.98223.98213.31298.64199.98279.97266.64373.30319.97447.96426.62597.27479.95671.93599.94839.92719.931007.90
24152.50213.49203.33284.66271.10379.55254.16355.82338.88474.43406.66569.32542.21759.09609.98853.98762.481067.47914.981280.97
27223.07312.30297.43416.40396.58555.21371.79520.51495.72694.01594.86832.81793.151110.41892.301249.211115.371561.521338.441873.82
30302.94424.12403.92565.49538.56753.98504.90706.86673.20942.48807.841130.981077.121507.971211.761696.461514.702120.581817.642544.70
33412.24577.13549.65769.51732.861026.01687.06961.88916.081282.511099.301539.011465.732052.021648.942308.522061.182885.652473.423462.78
36529.42741.18705.89988.24941.181317.66882.361235.301176.481647.071411.781976.491882.372635.322117.662964.732647.083705.913176.504447.09
镀锌（无润滑）的螺纹联接的拧紧力矩值（单位：N.m）
性能等级
3.64.64.85.65.86.88.89.810.912.9
螺纹直径d/mm
minmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax
30.300.420.400.560.530.740.500.700.660.930.801.121.061.491.201.671.492.091.792.51
3.50.470.660.630.880.841.170.781.101.041.461.251.751.672.341.882.632.353.292.823.95
40.700.970.931.301.241.731.161.621.552.161.852.602.473.462.783.893.484.874.175.84
51.411.971.872.622.503.502.343.283.124.373.755.255.007.005.627.877.039.848.4311.81
62.393.343.184.464.255.943.985.575.317.436.378.918.4911.899.5513.3711.9416.7214.3320.06
74.015.615.347.487.129.976.689.358.9012.4610.6814.9514.2419.9416.0222.4320.0328.0424.0333.65
85.808.127.7310.8210.3114.439.6613.5312.8818.0415.4621.6420.6128.8623.1932.4728.9940.5834.7848.70
1011.4816.0815.3121.4420.4228.5819.1426.8025.5235.7330.6242.8740.8357.1645.9464.3157.4280.3968.9096.47
1220.0328.0426.7137.3935.6149.8533.3846.7444.5162.3153.4174.7871.2299.7080.12112.17100.15140.21120.18168.25
1431.8844.6342.5059.5156.6779.3453.1374.3870.8499.1885.01119.01113.34158.68127.51178.52159.39223.15191.27267.78
1649.7469.6366.3292.8488.42123.7982.90116.05110.53154.74132.63185.69176.84247.58198.95278.53248.69348.16298.43417.80
1868.4395.8091.24127.73121.65170.31114.05159.67152.06212.89182.48255.47243.30340.62273.72383.20342.14479.00410.57574.80
2097.02135.83129.36181.10172.48241.47161.70226.38215.60301.84258.72362.21344.96482.94388.08543.31485.10679.14582.12814.97
22131.99184.78175.98246.38234.64328.50219.98307.97293.30410.63351.96492.75469.29657.00527.95739.13659.93923.91791.921108.69
24167.75234.84223.66313.13298.21417.50279.58391.41372.77521.88447.32626.25596.43835.00670.98939.38838.731174.221006.471409.06
27245.38343.53327.18458.05436.23610.73408.97572.56545.29763.41654.35916.09872.471221.45981.531374.141226.911717.671472.292061.20
30333.23466.53444.31622.04592.42829.38555.39777.55740.521036.73888.621244.071184.831658.761332.941866.111666.172332.641999.402799.17
33453.46634.84604.61846.46806.151128.61755.771058.071007.691410.761209.231692.921612.302257.221813.842539.372267.303174.222720.763809.06
36582.36815.30776.481087.071035.301449.42970.601358.831294.131811.781552.952174.142070.602898.852329.433261.202911.794076.503494.154891.80
镀锌（有润滑）的螺纹联接的拧紧力矩值（单位：N.m）
性能等级
3.64.64.85.65.86.88.89.810.912.9
螺纹直径d/mm
minmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax
30.240.340.330.460.430.610.410.570.540.760.650.910.871.220.981.371.221.711.472.05
3.50.380.540.510.720.680.960.640.900.851.201.031.441.371.911.542.151.922.692.313.23
40.570.800.761.061.011.420.951.331.261.771.522.122.022.832.283.192.843.983.414.78
51.151.611.532.152.042.861.922.682.563.583.074.294.095.734.606.445.758.056.909.66
61.952.742.603.653.474.863.264.564.346.085.217.296.959.737.8110.949.7713.6811.7216.41
73.284.594.376.125.838.165.467.657.2810.208.7412.2411.6516.3113.1118.3516.3922.9419.6627.53
84.746.646.328.858.4311.817.9111.0710.5414.7612.6517.7116.8723.6118.9726.5623.7233.2028.4639.84
109.4013.1512.5317.5416.7023.3915.6621.9220.8829.2325.0635.0833.4146.7737.5852.6246.9865.7756.3878.93
1216.3922.9421.8530.5929.1340.7927.3138.2436.4250.9843.7061.1858.2781.5865.5591.7781.94114.7298.33137.66
1426.0836.5134.7848.6946.3764.9243.4760.8657.9681.1469.5597.3792.74129.83104.33146.06130.41182.57156.49219.09
1640.6956.9754.2675.9672.35101.2867.8294.9590.43126.60108.52151.93144.69202.57162.78227.89203.47284.86244.17341.83
1855.9978.3874.65104.5199.53139.3593.31130.64124.42174.18149.30209.02199.07278.69223.95313.53279.94391.91335.92470.29
2079.38111.13105.84148.18141.12197.57132.30185.22176.40246.96211.68296.35282.24395.14317.52444.53396.90555.66476.28666.79
22107.99151.18143.99201.58191.98268.77179.98251.97239.98335.97287.97403.16383.96537.55431.96604.74539.95755.92647.94907.11
24137.25192.14183.00256.19243.99341.59228.74320.24304.99426.99365.99512.39487.99683.18548.99768.58686.23960.72823.481152.87
27200.77281.07267.69374.76356.92499.69334.61468.46446.15624.61535.38749.53713.84999.37803.071124.291003.831405.371204.601686.44
30272.65381.70363.53508.94484.70678.59454.41636.17605.88848.23727.061017.88969.411357.171090.581526.821363.231908.521635.882290.23
33371.01519.42494.68692.56659.58923.41618.35865.70824.471154.26989.371385.111319.161846.821484.052077.671855.062597.092226.073116.50
36476.47667.06635.30889.42847.071185.89794.121111.771058.831482.361270.601778.841694.132371.781905.902668.262382.373335.322858.854002.38
干燥的粗加工表面的螺纹联接的拧紧力矩值（单位：N.m）
性能等级
3.64.64.85.65.86.88.89.810.912.9
螺纹直径d/mm
minmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax
30.350.570.470.760.631.010.590.950.781.270.941.521.262.031.412.281.772.852.123.42
3.50.560.900.741.200.991.590.931.491.231.991.482.391.973.192.223.592.784.483.335.38
40.821.331.101.771.462.361.372.211.832.952.193.542.924.723.295.314.116.644.937.97
51.662.682.223.582.954.772.774.473.695.964.437.165.919.546.6510.748.3113.429.9716.10
62.824.563.766.085.028.104.707.606.2710.137.5312.1610.0316.2111.2918.2314.1122.7916.9327.35
74.737.656.3110.208.4213.597.8912.7410.5216.9912.6220.3916.8327.1918.9430.5923.6738.2328.4045.88
86.8511.079.1414.7612.1819.6811.4218.4515.2324.6018.2729.5124.3639.3527.4144.2734.2655.3441.1166.41
1013.5721.9218.1029.2324.1338.9822.6236.5430.1648.7236.1958.4648.2677.9554.2987.7067.86109.6281.43131.54
1223.6738.2431.5650.9842.0867.9839.4563.7352.6084.9763.12101.9784.17135.9694.69152.95118.36191.19142.03229.43
1437.6760.8650.2381.1466.98108.1962.79101.4383.72135.24100.46162.29133.95216.38150.70243.43188.37304.29226.04365.15
1658.7894.9578.37126.60104.50168.8197.97158.26130.62211.01156.75253.21209.00337.61235.12379.81293.90474.77352.68569.72
1880.87130.64107.83174.18143.77232.24134.78217.73179.71290.30215.65348.36287.54464.49323.48522.55404.35653.18485.22783.82
20114.66185.22152.88246.96203.84329.28191.10308.70254.80411.60305.76493.92407.68658.56458.64740.88573.30926.10687.961111.32
22155.98251.97207.98335.97277.31447.96259.97419.96346.63559.94415.96671.93554.61895.91623.941007.90779.921259.87935.911511.85
24198.24320.24264.33426.99352.44569.32330.41533.74440.54711.65528.65853.98704.871138.64792.981280.97991.221601.211189.471921.45
27290.00468.46386.66624.61515.55832.81483.33780.76644.441041.01773.321249.211031.101665.621159.981873.821449.982342.281739.982810.73
30393.82636.17525.10848.23700.131130.98656.371060.29875.161413.721050.191696.461400.262261.951575.292544.701969.113180.872362.933817.04
33535.91865.70714.541154.26952.721539.01893.181442.831190.901923.771429.082308.521905.453078.032143.633462.782679.534328.483215.445194.17
36688.241111.77917.651482.361223.541976.491147.071852.961529.422470.611835.312964.732447.083952.972752.964447.093441.205558.874129.446670.64
精加工表面（无润滑）的螺纹联接的拧紧力矩值（单位：N.m）
性能等级
3.64.64.85.65.86.88.89.810.912.9
螺纹直径d/mm
minmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax
30.160.230.220.300.290.410.270.380.360.510.430.610.580.810.650.910.811.140.981.37
3.50.260.360.340.480.460.640.430.600.570.800.680.960.911.281.031.441.281.791.542.15
40.380.530.510.710.670.940.630.890.841.181.011.421.351.891.522.121.902.662.283.19
50.771.071.021.431.361.911.281.791.702.392.042.862.733.823.074.293.835.374.606.44
61.301.821.742.432.323.242.173.042.894.053.474.864.636.485.217.296.519.127.8110.94
72.183.062.914.083.885.443.645.104.866.805.838.167.7710.888.7412.2410.9215.2913.1118.35
83.164.434.225.905.627.875.277.387.039.848.4311.8111.2415.7412.6517.7115.8122.1418.9726.56
106.268.778.3511.6911.1415.5910.4414.6213.9219.4916.7023.3922.2731.1825.0635.0831.3243.8537.5852.62
1210.9315.3014.5720.3919.4227.1918.2125.4924.2833.9929.1340.7938.8554.3843.7061.1854.6376.4865.5591.77
1417.3924.3423.1832.4630.9143.2828.9840.5738.6454.1046.3764.9261.8286.5569.5597.3786.94121.72104.33146.06
1627.1337.9836.1750.6448.2367.5245.2263.3060.2984.4072.35101.2896.46135.05108.52151.93135.65189.91162.78227.89
1837.3252.2549.7769.6766.3692.9062.2187.0982.94116.1299.53139.35132.71185.79149.30209.02186.62261.27223.95313.53
2052.9274.0970.5698.7894.08131.7188.20123.48117.60164.64141.12197.57188.16263.42211.68296.35264.60370.44317.52444.53
2271.99100.7995.99134.39127.99179.18119.99167.98159.98223.98191.98268.77255.97358.36287.97403.16359.96503.95431.96604.74
2491.50128.10122.00170.80162.66227.73152.50213.49203.33284.66243.99341.59325.32455.45365.99512.39457.49640.48548.99768.58
27133.84187.38178.46249.84237.95333.12223.07312.30297.43416.40356.92499.69475.89666.25535.38749.53669.22936.91803.071124.29
30181.76254.47242.35339.29323.14452.39302.94424.12403.92565.49484.70678.59646.27904.78727.061017.88908.821272.351090.581526.82
33247.34346.28329.79461.70439.72615.61412.24577.13549.65769.51659.58923.41879.441231.21989.371385.111236.711731.391484.052077.67
36317.65444.71423.53592.95564.71790.59529.42741.18705.89988.24847.071185.891129.421581.191270.601778.841588.252223.551905.902668.26
精加工表面（有润滑）的螺纹联接的拧紧力矩值（单位：N.m）
性能等级
3.6 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9
螺纹直径d/mm
minmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax
30.140.190.180.250.240.340.230.320.300.420.360.510.480.680.540.760.680.950.811.14
3.50.210.300.280.400.380.530.360.500.470.660.570.800.761.060.851.201.071.491.281.79
40.320.440.420.590.560.790.530.740.700.980.841.181.121.571.261.771.582.211.902.66
50.640.890.851.191.141.591.071.491.421.991.702.392.273.182.563.583.204.473.835.37
61.091.521.452.031.932.701.812.532.413.382.894.053.865.404.346.085.437.606.519.12
71.822.552.433.403.244.533.034.254.055.664.866.806.479.067.2810.209.1012.7410.9215.29
82.643.693.514.924.686.564.396.155.868.207.039.849.3713.1210.5414.7613.1818.4515.8122.14
105.227.316.969.749.2812.998.7012.1811.6016.2413.9219.4918.5625.9820.8829.2326.1036.5431.3243.85
129.1012.7512.1416.9916.1922.6615.1721.2420.2328.3224.2833.9932.3745.3236.4250.9845.5263.7354.6376.48
1414.4920.2919.3227.0525.7636.0624.1533.8132.2045.0838.6454.1051.5272.1357.9681.1472.45101.4386.94121.72
1622.6131.6530.1442.2040.1956.2737.6852.7550.2470.3460.2984.4080.38112.5490.43126.60113.04158.26135.65189.91
1831.1043.5541.4758.0655.3077.4151.8472.5869.1296.7782.94116.12110.59154.83124.42174.18155.52217.73186.62261.27
2044.1061.7458.8082.3278.40109.7673.50102.9098.00137.20117.60164.64156.80219.52176.40246.96220.50308.70264.60370.44
2259.9983.9979.99111.99106.66149.3299.99139.99133.32186.65159.98223.98213.31298.64239.98335.97299.97419.96359.96503.95
2476.25106.75101.66142.33135.55189.77127.08177.91169.44237.22203.33284.66271.10379.55304.99426.99381.24533.74457.49640.48
27111.54156.15148.72208.20198.29277.60185.90260.25247.86347.00297.43416.40396.58555.21446.15624.61557.69780.76669.22936.91
30151.47212.06201.96282.74269.28376.99252.45353.43336.60471.24403.92565.49538.56753.98605.88848.23757.351060.29908.821272.35
33206.12288.57274.82384.75366.43513.00343.53480.94458.04641.26549.65769.51732.861026.01824.471154.261030.591442.831236.711731.39
36264.71370.59352.94494.12470.59658.83441.18617.65588.24823.54705.89988.24941.181317.661058.831482.361323.541852.961588.252223.55
一般表面（无润滑）的螺纹联接的拧紧力矩值（单位：N.m）
性能等级
3.64.64.85.65.86.88.89.810.912.9
螺纹直径d/mm
minmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax
30.240.400.330.530.430.710.410.670.540.890.651.060.871.420.981.601.222.001.472.40
3.50.380.630.510.840.681.120.641.050.851.401.031.671.372.231.542.511.923.142.313.77
40.570.930.761.241.011.650.951.551.262.071.522.482.023.302.283.722.844.653.415.58
51.151.881.532.502.043.341.923.132.564.173.075.014.096.684.607.515.759.396.9011.27
61.953.192.604.253.475.673.265.324.347.095.218.516.9511.357.8112.769.7715.9611.7219.15
73.285.354.377.145.839.525.468.927.2811.908.7414.2711.6519.0313.1121.4116.3926.7619.6632.12
84.747.756.3210.338.4313.777.9112.9110.5417.2212.6520.6616.8727.5518.9730.9923.7238.7428.4646.48
109.4015.3512.5320.4616.7027.2815.6625.5820.8834.1025.0640.9233.4154.5737.5861.3946.9876.7356.3892.08
1216.3926.7721.8535.6929.1347.5927.3144.6136.4259.4843.7071.3858.2795.1765.55107.0781.94133.8398.33160.60
1426.0842.6034.7856.8046.3775.7343.4771.0057.9694.6769.55113.6092.74151.47104.33170.40130.41213.00156.49255.60
1640.6966.4754.2688.6272.35118.1667.82110.7890.43147.71108.52177.25144.69236.33162.78265.87203.47332.34244.17398.81
1855.9991.4574.65121.9399.53162.5793.31152.41124.42203.21149.30243.86199.07325.14223.95365.78279.94457.23335.92548.67
2079.38129.65105.84172.87141.12230.50132.30216.09176.40288.12211.68345.74282.24460.99317.52518.62396.90648.27476.28777.92
22107.99176.38143.99235.18191.98313.57179.98293.97239.98391.96287.97470.35383.96627.14431.96705.53539.95881.91647.941058.29
24137.25224.17183.00298.89243.99398.52228.74373.62304.99498.15365.99597.78487.99797.05548.99896.68686.231120.85823.481345.01
27200.77327.92267.69437.23356.92582.97334.61546.53446.15728.71535.38874.45713.841165.93803.071311.681003.831639.591204.601967.51
30272.65445.32363.53593.76484.70791.68454.41742.20605.88989.60727.061187.52969.411583.371090.581781.291363.232226.611635.882671.93
33371.01605.99494.68807.98659.581077.31618.351009.98824.471346.64989.371615.971319.162154.621484.052423.951855.063029.932226.073635.92
36476.47778.24635.301037.66847.071383.54794.121297.071058.831729.431270.602075.311694.132767.081905.903112.972382.373891.212858.854669.45
三、螺栓扭紧的力矩计算方法file:///C:/Users/Amplly/AppData/Local/Temp/msohtmlclip1/01/clip_image006.gif=KF0d(N·mm)
d螺纹公称直径，mm
F0预紧力，N
K拧紧力矩系数
T拧紧力矩
d2螺纹中径，mm
ω螺纹升角
ρv 螺纹当量摩擦角
μ螺母与被连接件的支承面间的摩托擦因数
Dw与支承平面连接的螺母或者垫圈的直径
d0螺纹外径
本帖最后由 淡然 于 2016-9-23 08:58 编辑
供参考 螺纹紧固件拧紧扭矩a:机械性能为4.8级的螺栓、螺钉和螺柱，其拧紧扭矩表:
螺纹直径mm螺距mm拧 紧 扭 矩
标 准 值最 大 值最 小 值
N·m(kgf·m)N·m(kgf·m)N·m(kgf·m)
614.5(0.5)6.0(0.6)3.0(0.3)
81.2510.6(1.1)14.0(1.4)7.0(0.7)
8111.0(1.1)15.0(1.5)8.0(0.8)
101.526.0(2.7)33.0(3.4)19.0(1.9)
101.2528.0(2.9)34.0(3.5)22.0(2.2)
10129.0(3.0)35.0(3.6)23.0(2.3)
121.7545.0(4.6)53.0(5.4)37.0(3.8)
121.547.0(4.8)56.0(5.7)38.0(3.9)
121.2550.0(5.1)60.0(6.1)40.0(4.1)
14281.0(8.3)95.0(9.7)62.0(6.3)
141.590.0(9.2)105.0(10.7)68.0(6.9)
162124.0(12.6)150.0(15.3)98.0(10.0)
161.5132.0(13.5)160.0(16.3)101.0(10.3)
b: 机械性能为8.8级的螺栓、螺钉和螺柱，其拧紧扭矩表:
螺纹直径mm螺距mm拧 紧 扭 矩
标 准 值最 大 值最 小 值
N·m(kgf·m)N·m(kgf·m)N·m(kgf·m)
619(0.9)12(1.2)6(0.6)
81.2523(2.3)26(2.7)16(1.6)
8125(2.5)28(2.9)17(1.7)
101.559(6.0)75(7.6)37(3.8)
101.2563(6.4)79(8.1)45(4.6)
10164(6.5)80(8.2)46(4.7)
121.7595(9.7)111(11.3)73(7.4)
121.597(9.9)113(11.5)75(7.6)
121.2599(10.1)115(11.7)78(8.0)
142160(16.3)185(18.9)122(12.4)
141.5180(18.3)205(20.9)146(14.9)
162215(21.9)245(25.0)182(18.6)
161.5240(24.5)270(27.5)199(20.3)
c:机械性能为10.9级的螺栓和螺柱，其拧紧扭矩表4:
螺纹直径mm螺距mm拧 紧 扭 矩
标 准 值最 大 值最 小 值
N·m(kgf·m)N·m(kgf·m)N·m(kgf·m)
101.574(7.5)90(9.2)52(5.3)
101.2578(8.0)93(9.5)63(6.1)
10180(8.2)95(9.7)65(6.6)
121.75140(14.3)156(15.9)105(10.7)
121.5142(14.5)158(16.1)106(10.8)
121.25145(14.8)161(16.4)108(11.0)
142175(17.8)200(20.4)141(14.4)
141.5210(21.4)235(24.0)178(18.1)
162280(28.5)310(31.6)200(20.4)
161.5305(31.1)335(34.1)240(24.5)
很全面，谢谢分享。
谢谢分享，能传网盘吗，谢谢 这么详细，赞！学习的好帮手。 mark 感谢楼主无私分享
感谢楼主无私分享 楼主辛苦考证一下：螺纹连接的二个摩擦系数的资料：支承面摩擦系数和螺纹摩擦系数。
很全面，谢谢分享。
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