Aluminum vs Steel Barrel Nut
- Thread starter bWONGER
- Start date
Dissimilar metals like steel and aluminium in contact with one another can lead to galvanic corrosion.
Use aluminium with aluminium and steel with steel to avoid that, or insulate the different materials from each other with a non-conductive material such as rubber, mylar, tyvek, nylon, etc.
Use aluminium with aluminium and steel with steel to avoid that, or insulate the different materials from each other with a non-conductive material such as rubber, mylar, tyvek, nylon, etc.
Aprilia Man
CGN Ultra frequent flyer
- Location
- Canadian "WET" Coast (Raincouver)
Apply Moly-Lithium Grease!
https://www.youtube.com/watch?v=KdBVrsPr0LM
[youtube]KdBVrsPr0LM[/youtube]
F22_RaptoR
CGN Ultra frequent flyer
- Location
- Edmonton, Alberta
Yep, some moly-lithium grease to prevent any sort of galvanic corrosion, and it doesn't matter what your barrel nut is made of!
Realistically, get whatever is cheaper, by the time you ACTUALLY see anything going wrong with your barrel nut, it'll probably be going wrong with your upper receiver as well.
Realistically, get whatever is cheaper, by the time you ACTUALLY see anything going wrong with your barrel nut, it'll probably be going wrong with your upper receiver as well.
Galling is not at all the same as galvanic corrosion.
https://en.wikipedia.org/wiki/Galling
https://en.wikipedia.org/wiki/Galvanic_corrosion
As long as the torque specs are for a lubed thread that is fine. If they are not then you are grossly overloading the nut.
Mark
+1 Torque spec for lubricated surfaces should be significantly lower.
Welllllllllll ...... seeing as the upper receiver is aluminum and the barrel extension is steel, who here wants to continue to argue galvanic corrosion at the barrel nut regardless of what it is made of?
One benefit to an alumninum barrel nut is that aluminum pulls heat away from the chamber area much more quickly than steel.
One benefit to an alumninum barrel nut is that aluminum pulls heat away from the chamber area much more quickly than steel.
bkelly4790
Regular
There isn't any real disadvantage to going with aluminum over steel Geissele uses aluminum with their rails and they are pretty much the top tier hand guard manufacturers.
To all the people worrying about galvanic corrosion you are kinda silly because the upper is anodized not raw aluminum and there should be a good helping of Aeroshell 33 on the threads of the upper. If you aren't using Aero33 or some other high temp lithium grease on the upper threads you are doing it very very very wrong as all the torque specs for barrel nuts are for lubricared threads not dry.
To all the people worrying about galvanic corrosion you are kinda silly because the upper is anodized not raw aluminum and there should be a good helping of Aeroshell 33 on the threads of the upper. If you aren't using Aero33 or some other high temp lithium grease on the upper threads you are doing it very very very wrong as all the torque specs for barrel nuts are for lubricared threads not dry.
Burt Macklin FBI
Regular
- Location
- Ontario, GTA
Never greased any of several ARs, no problems, ever.
