I was told to match lug nuts with wheels of the same material, ie, aluminum lug nuts on aluminum wheels or steel lug nuts with steel wheels. This is more important in a high stress environment (hotlapping/racing) from what I was told.
Supposedly, some lug nuts can cause cracks at the mounting holes because the wheel and lug nuts contract/expand at different rates at different temperatures because the lug nuts and wheel are of different materials.

I would love some insight on this.

 

That's a new one, to me. I have always run steel lug nuts, on steel, aluminum, and magnesium, on all of my cars.

 

The differences in materials is not as important as how you use them. I use stock or aftermarket (McGard splinedrive) nuts on both steel and alloy wheels. The most important things to do regardless of material is to use anti-seize on the studs and a Troque Wrench set according to you carmaker's spec-which for Honda is generally 80ft Lbs.

 

How many OE alloy wheels are held on with steel lugs in this world? Millions? I've never heard such a thing...

K

 

The torque setting reccomended by Honda is for a dry stud/nut. If you put antiseize on the studs, you should run a lower torque.

 

The thermal expansion coefficient of aluminum is higher than steel, so it should expand faster. I don't see why you would want to use an aluminum lug nut, since it would expand more than the equivalent steel lug nut, thereby putting more stress on the wheel.