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1、螺纹联接的拧紧力矩计算Mt = K X PoX dX 10 3 N.mK:拧紧力系数d:螺纹公称直径Po：预紧力P0= O0X AsAs也可由下面表查出.2As=兀X ds /4ds：螺纹部分危险剖面的计算直径ds= （d2+ d3）/2d3= di-H/6 H：螺纹牙的公称工作高度00 = （0.50.7） cscs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0.130.150.180.21表面氧化0.200.24镀 锌0.180.22干燥的粗加工表面0.260.3(T s查表:螺纹
2、性能等级3.64.64.85.65.86.88.89.810.912.9b s 或 b 0.2N/mm21802403203004004806407209001080As查表:螺纹公称直径d/mm33.545678101214161820222427303336公称应力截面积As/mm25.036.788.7814.220.128.936.65884.3115157192245303353459561694817通过计算得到螺栓联接拧紧力矩如下表所示: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
3、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：1111111111111111111111、螺栓材质公称抗拉强度达400MPa 级；111111111111111111112、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 X 0.6=240MPa 级性能等级10.9级高强度螺栓，其材料经过热处理后，能达到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10
4、00 x 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N.m) 1表面被氧化（无润滑）的螺纹联接的拧紧力矩值（单位:-匕匕 育级 一性F3.64.64.85.65.86.88.89.810.912.9螺纹直径d/mmminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax30.330.460.430.610.580.810.540.760.721.010.871.221.161.621.301.831.632.281.962.743
5、.50.510.720.680.960.911.280.851.201.141.591.371.911.822.552.052.872.563.593.084.3140.761.061.011.421.351.891.261.771.692.362.022.832.703.783.034.253.795.314.556.3751.532.152.042.862.733.822.563.583.414.774.095.735.457.636.138.597.6710.749.2012.8862.603.653.474.864.636.484.346.085.798.106.959.739.261
6、2.9710.4214.5913.0218.2315.6321.8874.376.125.838.167.7710.887.2810.209.7113.5911.6516.3115.5421.7517.4824.4721.8530.5926.2236.7186.328.858.4311.8111.2415.7410.5414.7614.0519.6816.8723.6122.4931.4825.3035.4231.6244.2737.9553.131012.5317.5416.7023.3922.2731.1820.8829.2327.8438.9833.4146.7744.5462.3650
7、.1170.1662.6487.7075.17105.241221.8530.5929.1340.7938.8554.3836.4250.9848.5667.9858.2781.5877.69108.7787.40122.36109.25152.95131.10183.541434.7848.6946.3764.9261.8286.5557.9681.1477.28108.1992.74129.83123.65173.11139.10194.75173.88243.43208.66292.121654.2675.9672.35101.2896.46135.0590.43126.60120.58
8、168.81144.69202.57192.92270.09217.04303.85271.30379.81325.56455.781874.65104.5199.53139.35132.71185.79124.42174.18165.89232.24199.07278.69265.42371.59298.60418.04373.25522.55447.90627.0620105.84148.18141.12197.57188.16263.42176.40246.96235.20329.28282.24395.14376.32526.85423.36592.70529.20740.88635.
9、04889.0622143.99201.58191.98268.77255.97358.36239.98335.97319.97447.96383.96537.55511.95716.73575.94806.32719.931007.90863.911209.4824183.00256.19243.99341.59325.32455.45304.99426.99406.66569.32487.99683.18650.65910.91731.981024.77914.981280.971097.971537.1627267.69374.76356.92499.69475.89666.25446.
10、15624.61594.86832.81713.84999.37951.781332.501070.761499.061338.441873.821606.132248.5930363.53508.94484.70678.59646.27904.78605.88848.23807.841130.98969.411357.171292.541809.561454.112035.761817.642544.702181.173053.6433494.68692.56659.58923.41879.441231.21824.471154.261099.301539.011319.161846.821
11、758.872462.421978.732770.232473.423462.782968.104155.3436635.30889.42847.071185.891129.421581.191058.831482.361411.781976.491694.132371.782258.843162.382541.203557.683176.504447.093811.805336.51表面被氧化（有润滑）的螺纹联接的拧紧力矩值（单位：N.m）-匕匕 育级 一性F3.64.64.85.65.86.88.89.810.912.9螺纹直径d/mmminmaxminmaxminmaxminmaxmin
12、maxminmaxminmaxminmaxminmaxminmax30.270.380.360.510.480.680.450.630.600.850.721.010.971.351.091.521.361.901.632.283.50.430.600.570.800.761.060.711.000.951.331.141.591.522.131.712.392.142.992.563.5940.630.890.841.181.121.571.051.481.401.971.692.362.253.152.533.543.164.433.795.3151.281.791.702.392.273
13、.182.132.982.843.983.414.774.546.365.117.166.398.957.6710.7462.173.042.894.053.865.403.625.074.826.755.798.107.7210.818.6812.1610.8515.2013.0218.2373.645.104.866.806.479.066.078.508.0911.339.7113.5912.9518.1314.5720.3918.2125.4921.8530.5985.277.387.039.849.3713.128.7812.3011.7116.4014.0519.6818.7426
14、.2321.0829.5126.3536.8931.6244.271010.4414.6213.9219.4918.5625.9817.4024.3623.2032.4827.8438.9837.1251.9741.7658.4652.2073.0862.6487.701218.2125.4924.2833.9932.3745.3230.3542.4940.4656.6548.5667.9864.7490.6472.84101.9791.04127.46109.25152.951428.9840.5738.6454.1051.5272.1348.3067.6264.4090.1677.2810
15、8.19103.04144.26115.92162.29144.90202.86173.88243.431645.2263.3060.2984.4080.38112.5475.36105.50100.48140.67120.58168.81160.77225.08180.86253.21226.08316.51271.30379.811862.2187.0982.94116.12110.59154.83103.68145.15138.24193.54165.89232.24221.18309.66248.83348.36311.04435.46373.25522.552088.20123.48
16、117.60164.64156.80219.52147.00205.80196.00274.40235.20329.28313.60439.04352.80493.92441.00617.40529.20740.8822119.99167.98159.98223.98213.31298.64199.98279.97266.64373.30319.97447.96426.62597.27479.95671.93599.94839.92719.931007.9024152.50213.49203.33284.66271.10379.55254.16355.82338.88474.43406.665
17、69.32542.21759.09609.98853.98762.481067.47914.981280.9727223.07312.30297.43416.40396.58555.21371.79520.51495.72694.01594.86832.81793.151110.41.892.301249.211115.371561.521338.441873.8230302.94424.12403.92565.49538.56753.98504.90706.86673.20942.48807.841130.981077.121507.971211.761696.461514.702120.5
18、81817.642544.7033412.24577.13549.65769.51732.861026.01687.06961.88916.081282.511099.301539.011465.732052.021648.942308.522061.182885.652473.423462.7836529.42741.18705.89988.24941.181317.66882.361235.301176.481647.071411.781976.491882.372635.322117.662964.732647.083705.913176.504447.09-匕匕 育级 一性F3.64.
19、64.85.65.86.88.89.810.912.9螺纹直径d/mmminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax30.300.420.400.560.530.740.500.700.660.930.801.121.061.491.201.671.492.091.792.513.50.470.660.630.880.841.170.781.101.041.461.251.751.672.341.882.632.353.292.823.9540.700.970.931.301.241.731.161.621.552.16
20、1.852.602.473.462.783.893.484.874.175.8451.411.971.872.622.503.502.343.283.124.373.755.255.007.005.627.877.039.848.4311.8162.393.343.184.464.255.943.985.575.317.436.378.918.4911.899.5513.3711.9416.7214.3320.0674.015.615.347.487.129.976.689.358.9012.4610.6814.9514.2419.9416.0222.4320.0328.0424.0333.6
21、585.808.127.7310.8210.3114.439.6613.5312.8818.0415.4621.6420.6128.8623.1932.4728.9940.5834.7848.701011.4816.0815.3121.4420.4228.5819.1426.8025.5235.7330.6242.8740.8357.1645.9464.3157.4280.3968.9096.471220.0328.0426.7137.3935.6149.8533.3846.7444.5162.3153.4174.7871.2299.7080.12112.17100.15140.21120.1
22、8168.251431.8844.6342.5059.5156.6779.3453.1374.3870.8499.1885.01119.01113.34158.68127.51178.52159.39223.15191.27267.781649.7469.6366.3292.8488.42123.7982.90116.05110.53154.74132.63185.69176.84247.58198.95278.53248.69348.16298.43417.801868.4395.8091.24127.73121.65170.31114.05159.67152.06212.89182.482
23、55.47243.30340.62273.72383.20342.14479.00410.57574.802097.02135.83129.36181.10172.48241.47161.70226.38215.60301.84258.72362.21344.96482.94388.08543.31485.10679.14582.12814.9722131.99184.78175.98246.38234.64328.50219.98307.97293.30410.63351.96492.75469.29657.00527.95739.13659.93923.91791.921108.69241
24、67.75234.84223.66313.13298.21417.50279.58391.41372.77521.88447.32626.25596.43835.00670.98939.38838.731174.221006.471409.0627245.38343.53327.18458.05436.23610.73408.97572.56545.29763.41654.35916.09872.471221.45981.531374.141226.911717.671472.292061.2030333.23466.53444.31622.04592.42829.38555.39777.55
25、740.521036.73888.621244.071184.831658.761332.941866.111666.172332.641999.402799.1733453.46634.84604.61846.46806.151128.61755.771058.071007.691410.761209.231692.921612.302257.221813.842539.372267.303174.222720.763809.0636582.36815.30776.481087.071035.301449.42970.601358.831294.131811.781552.952174.14
26、2070.602898.852329.433261.202911.794076.503494.154891.80镀锌（无润滑）的螺纹联接的拧紧力矩值（单位:N.m)-匕匕 育级 一性F3.64.64.85.65.86.88.89.810.912.9螺纹直径d/mmminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax30.240.340.330.460.430.610.410.570.540.760.650.910.871.220.981.371.221.711.472.053.50.380.540.510.720.680.96
27、0.640.900.851.201.031.441.371.911.542.151.922.692.313.2340.570.800.761.061.011.420.951.331.261.771.522.122.022.832.283.192.843.983.414.7851.151.611.532.152.042.861.922.682.563.583.074.294.095.734.606.445.758.056.909.6661.952.742.603.653.474.863.264.564.346.085.217.296.959.737.8110.949.7713.6811.7216
28、.4173.284.594.376.125.838.165.467.657.2810.208.7412.2411.6516.3113.1118.3516.3922.9419.6627.5384.746.646.328.858.4311.817.9111.0710.5414.7612.6517.7116.8723.6118.9726.5623.7233.2028.4639.84109.4013.1512.5317.5416.7023.3915.6621.9220.8829.2325.0635.0833.4146.7737.5852.6246.9865.7756.3878.931216.3922.
29、9421.8530.5929.1340.7927.3138.2436.4250.9843.7061.1858.2781.5865.5591.7781.94114.7298.33137.661426.0836.5134.7848.6946.3764.9243.4760.8657.9681.1469.5597.3792.74129.83104.33146.06130.41182.57156.49219.091640.6956.9754.2675.9672.35101.2867.8294.9590.43126.60108.52151.93144.69202.57162.78227.89203.472
30、84.86244.17341.831855.9978.3874.65104.5199.53139.3593.31130.64124.42174.18149.30209.02199.07278.69223.95313.53279.94391.91335.92470.292079.38111.13105.84148.18141.12197.57132.30185.22176.40246.96211.68296.35282.24395.14317.52444.53396.90555.66476.28666.7922107.99151.18143.99201.58191.98268.77179.982
31、51.97239.98335.97287.97403.16383.96537.55431.96604.74539.95755.92647.94907.1124137.25192.14183.00256.19243.99341.59228.74320.24304.99426.99365.99512.39487.99683.18548.99768.58686.23960.72823.481152.8727200.77281.07267.69374.76356.92499.69334.61468.46446.15624.61535.38749.53713.84999.37803.071124.291
32、003.831405.371204.601686.4430272.65381.70363.53508.94484.70678.59454.41636.17605.88848.23727.061017.88969.411357.171090.581526.821363.231908.521635.882290.2333371.01519.42494.68692.56659.58923.41618.35865.70824.471154.26989.371385.111319.161846.821484.052077.671855.062597.092226.073116.5036476.47667
33、.06635.30889.42847.071185.89794.121111.771058.831482.361270.601778.841694.132371.781905.902668.262382.373335.322858.854002.38镀锌（有润滑）的螺纹联接的拧紧力矩值（单位:N.m)干燥的粗加工表面的螺纹联接的拧紧力矩值（单位:N.m)一匕匕3.64.64.85.65.86.88.89.810.912.9螺纹直径d/mmminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmaxminmax30.350.570.470.760.
34、631.010.590.950.781.270.941.521.262.031.412.281.772.852.123.423.50.560.900.741.200.991.590.931.491.231.991.482.391.973.192.223.592.784.483.335.3840.821.331.101.771.462.361.372.211.832.952.193.542.924.723.295.314.116.644.937.9751.662.682.223.582.954.772.774.473.695.964.437.165.919.546.6510.748.3113.4
35、29.9716.1062.824.563.766.085.028.104.707.606.2710.137.5312.1610.0316.2111.2918.2314.1122.7916.9327.3574.737.656.3110.208.4213.597.8912.7410.5216.9912.6220.3916.8327.1918.9430.5923.6738.2328.4045.8886.8511.079.1414.7612.1819.6811.4218.4515.2324.6018.2729.5124.3639.3527.4144.2734.2655.3441.1166.411013.5721.9218.1029.2324.1338.9822.6236.5430.1648.7236.1958.4648.2677.9554.2987.7067.86109.6281.43131.541223.6738.2431.5650.9842.0867.9839.4563.7352.6084.9763.12101.9784.17135.9694.69152.95118.36191.19142.03229.431437.6760.8650.2381.1466.98108.1962.79101.4383.72135.24100.46162.29133.95216.