Welding Tips and Tricks

Hello there,
Now these are my parameters on the weld: #gtaw #welding 10-20 CFH, 3/32 Tri mix tungsten, #309stainless filler even though the material is #308stainless #7 ceramic cup gas lens at 150 amps pulsing manually as the machine with pulse is needing #argon. This on a brake rotor in the scap bin at my school. I would have the exact CFH although the label of the meter wasn't at a point where I could read and the booth next to it was and they are identical flowmeters. Now what could I do better?

I would start with other base metal than a break rotor before you get too concerned. And the break rotor / 308 SS combo is not going to be a good way to start practicing.

Brake rotors aren't 308 SS and 100 amps won't put a dent in a cast brake rotor. Like Poland alluded to..find something more suitable to practice on.

I initially used 120 only on the 1st bead. All the rest were at 150 and people on Facebook are making me question if it is stainless, and is actually carbon steel. Which does it look like to you?

If it's a brake rotor, it's carbon steel, and cast, not forged.

Steve S

Use a magnet and see if it sticks. If it's stainless, it won't. Likely steel and 70s2 is a better rod choice.