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Phylodog · 11-20-2009, 07:20 PM

I'm attempting to make a front bumper out of aluminum. I'm trying to use Dura-Fix and the propane torch I was using wasn't providing the heat I needed. I bought a MAPP torch which can be used with just MAPP or a MAPP/O2 mix. I tried to use this new torch and it is turning everything black. I followed the instructions that came with the torch so I don't know what the problem is.

Anyone know what I might be doing wrong?

Oogie · 11-20-2009, 08:10 PM

Dont quote me on this, but i dont think you can cut alluminum with a cutting torch.

As far as i know they are only for iron / steel

Phylodog · 11-20-2009, 08:42 PM

Thanks but I'm not trying to cut it I'm trying to weld/braze or whatever you'd call it with the Dura-Fix product. I basically just need to get it hot enough and the MAPP should do it, I just don't know how to keep it from turning everything black.

squatch71 · 11-20-2009, 09:11 PM

I tried that, but didn't think it got the aluminum hot enough...maybe I didn't leave it on long enough.

how about keeping it black, then when your done use a wire wheel on a grinder and take off all the black?

got a pic of what you doing...did it braze it??? maybe I should of stayed with it longer..might of worked huh???

freetimecrawler · 11-20-2009, 09:14 PM

You'll get the black soot using just mapp, use mapp and oxy, if/when you have the flame adjusted right it won't produce that soot, and should get plenty hot.

squatch71 · 11-20-2009, 09:28 PM

how do you adjust the flame...mine is just a torch with a ignitor..

Duuuuuuuude · 11-20-2009, 09:31 PM

I've never had any luck brazing aluminum. It just won't stick together.

And btw, the Mapp will get it hot enough to melt, which pretty much ruins the part.

11-20-2009, 07:20 PM	#1
Phylodog Quarry Creeper Join Date: Oct 2009 Location: Indianapolis, IN Posts: 298	MAPP Torch Help I'm attempting to make a front bumper out of aluminum. I'm trying to use Dura-Fix and the propane torch I was using wasn't providing the heat I needed. I bought a MAPP torch which can be used with just MAPP or a MAPP/O2 mix. I tried to use this new torch and it is turning everything black. I followed the instructions that came with the torch so I don't know what the problem is. Anyone know what I might be doing wrong?

11-20-2009, 08:10 PM	#2
Oogie Newbie Join Date: Nov 2008 Location: Canada Posts: 44	Dont quote me on this, but i dont think you can cut alluminum with a cutting torch. As far as i know they are only for iron / steel

11-20-2009, 08:42 PM	#3
Phylodog Quarry Creeper Join Date: Oct 2009 Location: Indianapolis, IN Posts: 298	Thanks but I'm not trying to cut it I'm trying to weld/braze or whatever you'd call it with the Dura-Fix product. I basically just need to get it hot enough and the MAPP should do it, I just don't know how to keep it from turning everything black.

11-20-2009, 09:11 PM	#4
squatch71 I wanna be Dave Join Date: Sep 2008 Location: four o six Posts: 2,101	I tried that, but didn't think it got the aluminum hot enough...maybe I didn't leave it on long enough. how about keeping it black, then when your done use a wire wheel on a grinder and take off all the black? got a pic of what you doing...did it braze it??? maybe I should of stayed with it longer..might of worked huh???

11-20-2009, 09:14 PM	#5
freetimecrawler Debunking old stereotypes Join Date: Feb 2006 Location: 1st and Amistad Posts: 2,260	You'll get the black soot using just mapp, use mapp and oxy, if/when you have the flame adjusted right it won't produce that soot, and should get plenty hot.

11-20-2009, 09:28 PM	#6
squatch71 I wanna be Dave Join Date: Sep 2008 Location: four o six Posts: 2,101	how do you adjust the flame...mine is just a torch with a ignitor..

11-20-2009, 09:31 PM	#7
Duuuuuuuude Suck it up! Join Date: Mar 2008 Location: Arkansas Posts: 11,652	I've never had any luck brazing aluminum. It just won't stick together. And btw, the Mapp will get it hot enough to melt, which pretty much ruins the part.

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