aluma cups magnesium and titanium ?

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my instructor is teaching me how to weld magnesium and titanium in a few months he said they make giant aluma cups that are about 4 to 5 inch in diameter never seen em he said its the only right way to get gas coverage with out building a purge box .ive never seen these were can i buy some at ?Quote Originally Posted by vwguy3  View PostHave you ever seen a cow that was welding overhead burst into flames my certs as of 1/29/14SMAW3G plate 2,4,6, 6Ghard wire and flux core 3GGTAW2,4,6 6G3G plate SS sch 80 6G
Reply:Mag can be welded with normal sized cups. I've never seen 4-5" cups.. Biggest I've seen was around 1.5" and had a trailing shield behind it.Airco Ac/Dc 300 HeliwelderMillerMatic 200 (stolen)Miller Maxstar 150STLMiller AEAD200LE (welding and generating power) Hobart MIG
Reply:He's got to be thinking about a trailing shield. Never seen a alumina nozzle anywhere near that size. Titanium depending on application can be welded without a trailing shield successfully. Gas coverage has a lot to do with torch angle and keeping a long post flow and not pulling torch away from work when arc goes out.
Reply:ok thank you how much should a trailing shield set me back ? need one for a wp-17 i run a gas lens alsoQuote Originally Posted by vwguy3  View PostHave you ever seen a cow that was welding overhead burst into flames my certs as of 1/29/14SMAW3G plate 2,4,6, 6Ghard wire and flux core 3GGTAW2,4,6 6G3G plate SS sch 80 6G
Reply:A trailing shield is prob more than you want to spend. A large gas lens will be fine for most anything you are doing while learning, short welds (1" or less) will let you keep the weld shielded properly. Lots of info here http://www.millerwelds.com/resources...tanium-weldingAirco Ac/Dc 300 HeliwelderMillerMatic 200 (stolen)Miller Maxstar 150STLMiller AEAD200LE (welding and generating power) Hobart MIG
Reply:Here's a Miller Web page on Titanium with a homemade Trailing shield     http://www.millerwelds.com/resources...anium-welding/TO INVENT  YOU NEED A GOOD IMAGINATION  AND A  PILE OF JUNK'' - THOMAS EDISONMost Of The Time People Don't see The Quality of a Good Job Unitl they see a Bad Job !! -Scott Esplin