Tig Electrode sizes

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I am real new to Tig welding could someone tell me what size as in .040 or 1/16 1/8 or 3/32 that I need to use on say 11ga steel and aluminum what color do  I buy and what brand is good or does it matter. What about filler rod for aluminum 11GA and or 11ga mild steelThanks
Reply:1/16 or 3/32 would be fine for what you are doing.What kind of welder are you using?  If its an inverter buy red for everything.  If its a sine wave (heavy) welder, you may need green for aluminum on AC.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:Lincoln Precision TIG 225
Reply:Originally Posted by worm122Lincoln Precision TIG 225
Reply:red it is then thanks for the reply and good words on the TIG welder I am a lincoln guy all the way it looks good next to my power mig 215
Reply:One more questionweldcraft has red and what looks like orange Orange is 2% Ceriatedred is  2% Thoriatedwhich do I want and what is the difference
Reply:Thorated is radioactive.  I guess it won't hurt you unless you injest the dust from grinding the tungsten.Cerated is another rare earth element that is supposed to be as good.  I can't tell the difference.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:I have been running 1.5% Lanthanated (Gold) 3/32 and like them.  I did not have good luck with 2% Ceriated (Orange).You can request samples from:http://www.diamondground.com/freesample.htmlMe!
Reply:I have one gold tungsten.  It seems to not get contaminated as easily.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:Originally Posted by worm122Lincoln Precision TIG 225
Reply:I use red on everything but alum, green for that. Tho I could use red on it if I really wanted.Have we all gone mad?
Reply:I always prefer 2% ceriated i don't like the thought of radioactive thorium