General Tig Question

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here's a general question about TIG welding ....Is filler generally used welding two piece of metal together ?  I find that I can control the melting of the metal so that they pool together and then I move on .... so when is filler appropriate?I have a Miller Syncrowave 200 .... 1/8 scrap steelAcademyKP03Miller Sychcrowave 200
Reply:Originally Posted by AcademyKP03here's a general question about TIG welding ....Is filler generally used welding two piece of metal together ?  I find that I can control the melting of the metal so that they pool together and then I move on .... so when is filler appropriate?I have a Miller Syncrowave 200 .... 1/8 scrap steel
Reply:Thanks - just wondering .... thanks for the help!AcademyKP03Miller Sychcrowave 200
Reply:For all metals requiring complete joint penetration with thickness greater than 3/32" I would agree that filler metal is generally required (unless your joint design includes a consumable portion).I must take issue with your response though Zapster.  With proper preparation almost all metals can produce autogenous welds using the GTAW process.  There are some AL alloys, especially the 5K series that almost always crack without proper filler metal.  I have developed many processes for fusing cold rolled steel, and a number for certain AL alloys (3k series in particular fuse readily).  Titanium also fuses quite nicely.Many of the exhaust components on diesel trucks or fused cold rolled steel.  As are the cylinders for small BBQ smokers.  Just two recent projects.Last edited by Chris welds; 03-28-2008 at 10:34 AM.