davidjohnperry
a different breed
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what thickness was that? i had good results lately on 3mm steel at 110A 1,0 mig wire for tiny beads.
davidjohnperry
a different breed
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10 mm or 12 mm I find 80-90 amps on 3 mm with 1.2 MIg wire and I get push through i probably hang around to long
davidjohnperry
a different breed
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Cheers for that @bR39Da I could never remember that I wish I did more Tig work it's all scratch start at the moment as my hf is down. I think I need to add less filler as I still dab like there's no tomorrow and pick up the pace a bit more. All tips are welcome I'm still quite a beginner when it comes to Tig
davidjohnperry
a different breed
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Richard.
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Rules of thumb are ok if you’ve no idea what so ever where to start but in reality they can be miles out.
Joint configuration changes everything by a lot.
An open outside corner would not be easy using suitable current for a fillet joint and vicer verca.
Use your rule of thumb for the butt joint which is around 35amps per 1mm roughly. Add 5-10 for a fillet and and subtract 5-10 for an outside corner and you’ll not be a million miles away. Now this is all to a point. You would not weld a 10mm fillet joint with 450 amps. For 1 wrong process but more importantly you’d need a lump of 5mm bar to fill it so you would set it to the limit of your filler size and multi pass it. So a 10mm fillet joint if it must be tig welded would probably be done with 200 amps a 2.4 filler and a boat load of runs to get the leg length.
Joint configuration changes everything by a lot.
An open outside corner would not be easy using suitable current for a fillet joint and vicer verca.
Use your rule of thumb for the butt joint which is around 35amps per 1mm roughly. Add 5-10 for a fillet and and subtract 5-10 for an outside corner and you’ll not be a million miles away. Now this is all to a point. You would not weld a 10mm fillet joint with 450 amps. For 1 wrong process but more importantly you’d need a lump of 5mm bar to fill it so you would set it to the limit of your filler size and multi pass it. So a 10mm fillet joint if it must be tig welded would probably be done with 200 amps a 2.4 filler and a boat load of runs to get the leg length.
