Welding studs?

[R3Z3N]

Everyone who has done it has died. They're not going to be able to respond here.

The result:

[nando]

welding is the absolute worst process for anything structural that sees fatigue loads

what the heck is a fatigue load?

I kind of know what you're getting at but I work in structural steel/engineering and I've never heard of a bolt in a "fatigue load". it's going to be in shear or tension (wheel bolts probably experience both).

yes, welding a bolt will change it's properties, possibly making it either brittle or lowering the yield strength.

but it's moot since he listened and did the right thing :)

[digger]

what the heck is a fatigue load?

I kind of know what you're getting at but I work in structural steel/engineering and I've never heard of a bolt in a "fatigue load". it's going to be in shear or tension (wheel bolts probably experience both).

yes, welding a bolt will change it's properties, possibly making it either brittle or lowering the yield strength.

but it's moot since he listened and did the right thing :)

a fatigue load is just one that changes with time, in general the load whether it be shear, bending or axial on the bolt changes with time so it can crack after it sees several hundred, thousand or millions of cycles depending on how large the magnitudes are.

welding does weaken some steels but it always introduces flaws, residual stress and large stress concentrations all of which are killer if the part sees loads (and stresses) that change with time.

headbolts, rod bolts etc are all subject to fatigue loads and must be designed to withstand fatigue.