[chainbreaker2012]

Hello I am Thomas, I work as a Industrial Electrician/millwright at a plywood mill here. currently I have a new AHP ALPHATIG201XD, Miller 140, cheap cut50, and a Miller bobcat 250. This AHP is my introduction to TIG. So far it has been alot of fun learning! However I do have a question.

I am trying to weld some 1/4" plate steel I am using a 3/32 2% lanthanated tungsten, 1/4" stickout #8 cup w/ gas lense, 20cfh (tried down to 10 and up to 30 cfh) and 3/32 er70s-2 along with er70s-6 metal cleaned with flap disc to shiny and then wipped off with acetone. I have the welder set to 150 amps (puddles within 3 sec.) and on foot control.

Here is my problem:

After welding the weld bead looks good in shape with good penetration but the weld colour is the color of the millscale I removed. Thinking this was a coverage issue I turned the gas up and ran another. Same result. Does anyone have any ideas? I welded some berring races I took out of my truck to check on a different type of steel and those looked fantastic it's just on mild steel.

[Poland308]

If the steel is getting heat soaked ( possible that your using too low of amps or moving too slow). or if your running too hot it can cause what your seeing.

[chainbreaker2012]

If the steel is getting heat soaked ( possible that your using too low of amps or moving too slow). or if your running too hot it can cause what your seeing.

Thank for for the response, I do believe you are correct, I think I was a little hot and possibly going to slow. when I get off work in the morning i am going to try again.

[cj737]

I would bump up your heat and go faster. Also, make sure you clean the edges and backside of hot rolled material. Then a decent wipe with Acetone or equivalent.

[chainbreaker2012]

figured it out, it was turned up to hot and moving too slow, finally fount my rythem with background music and I'm good to go, thank yall for the assistance.