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#1
11-03-2009, 02:49 AM
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welding thin to thick, proper pre-heat?
Im looking for a few tips on welding thick aluminum to thin aluminum. around what temperature to heat the thicker pieces when working in these conditions.
welding 3/8" plate to 1/16" tubing, and 1/2" plate to 1/16 tubing...
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Lincoln Square Wave 175 TIG Lincoln 110v flux core welder (my 1st) Clarke 180EN MIG 
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#2
11-03-2009, 08:47 AM
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Re: welding thin to thick, proper pre-heat?
250-350°F should do it.
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#3
11-03-2009, 08:54 AM
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Re: welding thin to thick, proper pre-heat?
Hey sen2two,
I do some of that type welding for my company at home since we don't have an alum. setup at work. I have had excellent success with a 350* preheat of the thicker piece. Also, the parts I do are a casting for the thick part & T6061, 1.5" angle X .125" thick welded together. Denny
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Miller Challenger 172 MIG Riland MM250L Spoolgun MIG(Mobile Unit) Chicago Electric CE160 Alum. MIG Chicago Electric 151T2 Alum MIG(Mobile Unit) Miller Sidekick MIG Thermal Dynamics Pakmaster PAK50 Plasma Cutter(Mobile Unit) Giant Tech ARC-200 Stick(Mobile Unit) Riland WSE200P AC/DC TIG/Stick (2)Victor Oxy-Acet. setups(Shop-Mobile) 7.5KW Generator(Mobile Unit) Mobil Welding Trailer Complete Machine/Fab. Shop "A man's word is his honor...without honor there is nothing."
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#4
11-03-2009, 05:16 PM
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Re: welding thin to thick, proper pre-heat?
thanks! ill go with 350* and adjust from there if need be...
also, should i make a jig to keep the 3/8" or 1/2" thick piece from warping. or should it be fine? what im doing is making an intake manifold for my car. so the thick plate is for the flange (6061) and the tubing is for the runners (also, 6061)
__________________
Lincoln Square Wave 175 TIG Lincoln 110v flux core welder (my 1st) Clarke 180EN MIG
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