Bluemoon
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| posted on 16/6/10 at 12:24 PM |
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Low temp Aluminum welding rods...
What are peoples experiences of these?
I am thinking about making a small airbox for my carb's from some aluminum sheet and welding (well soft soldering I guess) using Durafix rods or
similar..
Dan
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minitici
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| posted on 16/6/10 at 01:17 PM |
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I've used HTS2000 aluminium brazing rods with some success.
However you need a good controlable heat source (I use oxy-Mapp gas).
You may find that you end up melting one joint when you try to braze another.
I prefer to use tig now 
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v8kid
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| posted on 16/6/10 at 01:52 PM |
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Its quite tricky to control the slag - you have to abrade the molten surface to get the ally filler to wet and the aluminium oxide layer then floats
off which can look a bit naff.
I ally soldered a gearchange extension casting I had cut a bit but of the middle ti to shorten and it looked awful.
Extremely strong though I was hillclimbing the car at the time and I was slamming it into gear and it never broke over two seasons.
Cheap mans version of tig I suppose but nowhere near so convenient and tidy
Cheers
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austin man
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| posted on 16/6/10 at 02:58 PM |
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for an airbox you should get a good finish it is imperative that you clean the oxidization with a stainless steel brush as this will effect adhesion.
also as mentioned a good controlable heat source. I would also recomment that you rivet wherever possible to keep the joint as close together as
possible
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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BenB
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| posted on 16/6/10 at 02:58 PM |
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I used technoweld and it's great. Good and strong too. As said though there is an annoying tendency for your previous brazes to melt whilst
doing new joints so I tend to use bent + rivetted ali strips to hold everything together and then fill the holes afterwards....
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Bluemoon
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| posted on 17/6/10 at 09:00 AM |
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Thanks Guys, looks like this is not a silly idea, might even be "fun"...
Dan
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matt_gsxr
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| posted on 18/6/10 at 09:05 PM |
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for something like an airbox (i.e. quite big) you can pop it on the gas hob on a low heat to help keep things hot enough if your torch hasn't
got enough juice. I did this when I cut down my sump (which was a damned good heat-sink).
Obviously be careful not to melt the whole thing!
Matt
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