need advice on aluminum filler metal

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I recently ordered a Dynasty 350 TIG machine and need a little advice on what kind of aluminum filler metals to keep on hand.  I will not be welding much aluminum, just the occasional oil cooler tank, ladder, or whatever else breaks.  I have NO idea what grade of aluminum any of these parts are, but I have some old scrap oil coolers I can do a little experimenting on.  Some of you know my situation over here, I have ZERO axcess to any kind of welding supply store so everything has to be ordered in, go through customs, blah, blah, blah.  So long story short----what different kinds of filler metals would you guys recommend me ordering to keep on hand, with the understanding that I don't really worry about what it costs, I just want to be prepared for most anything that may come up?Maybe stainless too.Thanks in advance--Matt6 Miller Big Blue 600 Air Paks2 Miller 400D6 Lincoln LN-25's4 Miller Xtreme 12VS2 Miller Dimension 812 4 Climax BW-3000Z bore welders Hypertherm 65 and 85Bug-O Track BugPair of Welpers
Reply:4043 , 5356HTP Invertig 201Lincoln Idealarc SP250Miller 180 AC StickBy farmall:They should have held the seagull closer to the work, squeezing evenly for best deposition.
Reply:Originally Posted by fordman4043 , 5356
Reply:If you are going to be welding things like tanks and oil-coolers where liquid-tightness is important, I'd get 4047 instead of, or in addition to, the 4043. It has a higher silicon content and "wets" better.5356 for almost everything structural, but not for continuous exposure to temps over 150F.JohnA few weldersA lot of hammersA whole lot of C-clamps
Reply:and to add:  use 5356 for alum that is going to be anodizedidealarc 250/250 ac-dc tigidealarc 250/250 ac-dc tig #2 used for sticklincoln sp100hh125dual arbor grinder polisher30 yrs of hand tools52 pitch blocks 6p-26prake gauge -pitch gaugeG&D prop repair 918-207-6938Hulbert,okla 74441
Reply:Originally Posted by Silicon-basedIf you are going to be welding things like tanks and oil-coolers where liquid-tightness is important, I'd get 4047 instead of, or in addition to, the 4043. It has a higher silicon content and "wets" better.5356 for almost everything structural, but not for continuous exposure to temps over 150F.John
Reply:4043, 5356 will cover most jobs. 5356 if you want to drill, tap or machine it, the 4043 machines "gummy".  I use 5356 on unknown and if I have weld cracking issues I switch to 4043. I have more porosity porblems with 5356 on parts with some corrosion, 4043 seems to seal better. Tanks are mostly made of 5000 series al and I have less weld cracking with the 4043. Not knowing the alloy to be welded can be a pain, but these two fillers will cover most stuff.PeterEquipment:2  old paws2  eyes (that don't look so good)1  bad back