Silicon Bronze Hot cracking?

[Matt 5.0]

Hawk,
After reading your post on the Dynasty 200DX, I regained my confidence in my capabilities for welding AL. I was having a **** of a time with 4130, but I took your advice and now things are running much better. The machine is a great piece, but I was a bit intimidated by all the settings....

[Matt 5.0]

We actually bought our 200DX at PRI last year after Andy let us play around with one. Great machine.Use it almost everyday at the shop. Thanx Andy! Looking forward to this years show, it's the last year we get to go to the "Classy Chassis"

[Matt 5.0]

Thanx Andy, I'm going to cut the sump off tomorrow and weld it on a new tank with some 70S2. Kind of hard to mess that up

Matt

[Matt 5.0]

Was welding a sump on a steel gas tank today for one of our race cars. Tried my hand at the Si Br filler. 1/16 filler, 45 amps, 2%thoriated, Miller dynasty 200DX, post flow 5sec, gas set at 15lbs. The first thing I noticed was that it looks real dirty in the puddle, then when I flipped the hood up,...

[Matt 5.0]

Thanx for the heads up Hawk. Sounds like good info, I will try it out as soon as I refill the Argon bottle. Also, what's the deal with 2% vs pure tungsten. I was always taught that 2% will contaminate AL, but lately I have been hearing that it will work fine. Thanx guys

Matt

[Matt 5.0]

Thanx dse, As a Boilermaker, we don't work with AL all that much, just trying to get some practice.

Thanx again

[Matt 5.0]

Swift, I am having the same problem with my new Dynasty 200 DX. Thought it was me, no matter how slow I slope it down with the pedal, it craters. Interseted in seeing if anyone knows....subscribing.