Semi truck steel frames are usually 110,000 or 120,000 psi heat treated steel. Use some Brutus AAA for 128,000 psi, not that Polaris AAA
My Rockmount guy stopped by the shop today and I was talking to him on this subject and he recommended the Polaris for general frame repair. Reason being is the Brutus does not work well vertical, or at all if Im running it. I bought a couple different mig wires from him im going to try the next time im welding in the shop, instead of outside like usual.
