螺栓螺母扭矩推荐表

强度等级最小破断强度

材质螺栓M(mm)1416182022242730333639424548525660687276808590100110120

螺母S(mm)2224273032314650556065707580859095100105110115120130145155175

4.8392MPa一般结构钢扭矩值(KGM)710141823324560751001201551802302803604105105806607508309001080140016702030

(NM)6998137176225314441588735980117615191722542744352840184998568468735081348820105841372016366194

6.8588MPa机械结构钢扭矩值(KGM)101421283448659011515018024028035042053061076087010001100125014001650205025503050

(NM)981372062963334706378821127147017235227443430411651495978744885269800107801225013720161702009024990290

8.8784MPa铬钼合金钢扭矩值(KGM)142129415570105125150180220280320400480610790900110012901500185022502500

(NM)13720628440253968610291225147017215627443136392047045978774288201078012214700181302205024500

10.9941MPa镍铬钼合金钢

扭矩值(KGM)17253558781001502002102503003904505706708601100

(NM)1652473415697659811472196220602453294338241555926573843710791

12.91176MPa镍铬钼合金钢扭矩值(KGM)2339699312018024025030037047055068085010501350

(NM)22535348067691111761723522450294036260653906683301029013230

注：

1、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%时所测定的。2、建议锁紧扭矩值为：表中数据×80%。

例如：M48，8.8级螺栓，则锁紧扭矩为:400×80%=320KG.m3、拆松扭矩值为锁紧扭矩的1.5~2倍。

例如：上例锁紧扭矩为320KG.m，则其拆松扭矩为320×（1.5~2）=480~0KG.m