What tells you that its too much amps. Is that because the dull appearance? Or because of my estimation of power? As said. I dont know the actual amps used. I didnt floor the pedal. Only using 1/2 to 3/4 approx pedal. And pedal was set to max out at approx 2/3 to 3/4 of machine capacity. So im ball parking 100a. I havent adjusted the machine since last using it so i could power it up and watch the display while firing up an arc.
I have a bunch of different filler that ive been practising with. The welds shown arent actually using any filler at all, just fusion joins. But i did use some er308 on the inner edge to try and weld the inner join.
The flange is 304. And im 99% certain the tube is too. But yeah. Ive been researching the different grades of filler to suit different applications. There is a good chart on Mr TIGs website.
I have an extra flow meter and Y piece to fit my argon reg that will be used for back purging when the time comes. But there was no back purge on that weld shown. And i dont think it needed any. I dont have any photos of the inside. But there was very very little sugaring. Only a couple of tiny bubbles in a couple of places that got a bit hot. 95% of the backside of the weld was free of sugaring. Yet you could see the puddle just starting to surface. So i think that means the penertration into the tube was a good amount???
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Originally Posted by shaunus
Amps are too high mate. Weld looks good though. What filler wire are you using? Are both the pipe and flange of the same grade ss? If not you need to use a filler wire to suit.
Wire brushing the welds after is usually enough to bring up a decent luster.
When I did my hard piping on my D40 Navara I pickled them after as the piping looked too nice not to. Doubt it'd be worth it when the exhaust is buried under the car though. Held 23psi all day every day. Made my own inter cooler kit for around $200 compared to the 4x4 places wanting ~$1400
Pics are from when I did mine prior to clean up. Used very little filler as i mostly fused the joins...was also purged. I am not a welder or anything, I just work for a construction company so pick up a few things here and there when out of the office.
Keep at it. Your technique looks decent just try slow down a little. Tig is usually pretty slow going.
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