Torquing 300 Series Stainless Steel Bolts
Torquing 300 Series Stainless Steel Bolts
(OP)
The standard torque equation is T=KFD where T = torque, K is the "nut factor," determined experimentally, F is the force (LBS, N) and D = the nominal bolt diameter.
Does anyone have any data/experience with the value of K for 300 series bolt material, e.g., A193-B8? As received values (dry) are in the neighborhood of 0.3. But what is the value when you add a lubricant?
Thanks
Does anyone have any data/experience with the value of K for 300 series bolt material, e.g., A193-B8? As received values (dry) are in the neighborhood of 0.3. But what is the value when you add a lubricant?
Thanks





RE: Torquing 300 Series Stainless Steel Bolts
However, as you noted, this should be determined experimentaly for your particular application and lubricant.
Of course, if your application is important you should consider something better than torque control for controlling fastener preload.
RE: Torquing 300 Series Stainless Steel Bolts
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: Torquing 300 Series Stainless Steel Bolts
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Torquing 300 Series Stainless Steel Bolts