Welding and brazing are two different processes. Welding involves melting the metal of your part and adding molten filler metal so the two parts become one. Brazing involves heating your part (but not melting it), so that it can receive filler material (brazing rod) through capillary action. The filler rod is not aluminum, but an alloy that melts at a lower temperature. In brazing the two parts have not become one, as in welding, but are connected by the filler material. Brazing is akin to soldering. It is a good application for ornamental metal work, or light duty applications. It is not appropriate for structural work. Thanks for the video.
so this video is on brazing for light duty oranmental repair ? I've pretty good crack in auto part . What do you think of repairing something like that ? It's where AC compressor is mounted to oil pan
@@frankmontez6853 I would think that for automotive applications a brazed repair would end up failing with vibrations, and most significantly torque, experienced by a compressor. In a weld the filler and joint are as strong as the part's material. In a braze the filler is not as strong as your base material.
@@hectorgarza228 Car AC systems are under pressure. I'm not sure if brazing will hold up to the pressure, but that's a guess. I don't have experience to know for certain.
Very nice instructional video. Very well thought out, very good verbal instruction and describing in detail what you were doing. One thing is instead of using Propane, I would use MAP gas which comes in the yellow bottle/canister. My father and grandfather were pipe fitters and anytime they did any soldering on copper pipes at home or on jobs they would use MAP gas because they said it burned hotter. Aluminum is tricky because it conducts and dissipates heat and cold really well, so getting the aluminum really hot might help the aluminum stay hotter longer and the Alumiweld to flow better. All in all a very good video. Thank You.
Alumiweld needs just 730F to work while most Aluminum melts anywhere between 800 and 1200F. MAP reaches ~3700F while regular propane reaches 3600F Having studied thermodynamics, 235W/Km is pure aluminums thermal conductivity at room temperature. Using the same weight and surface area aluminum, the energy (J) required , we can see the difference of gases. MAP heats up the aluminum faster, but the time it takes to melt said aluminum is negligible as 3700F vs 3600F starting from a surface temp of 70F and desired temp of 730F would take less than a second difference. Propane is significantly less expensive. Also, being a DIYer who has used both gases in practice, the difference is negligible. There's really no reason to choose MAP over Propane unless you already have it or you're going to die without brazing that piece of aluminum in the spare second.
I am impressed with your "solder gun" for this purpose. I have long used a standard "solder gun" for plumbing, but you have to hold down the "start" button to keep the flame going. Your gun seems to have an "always on" switch which works great for this purpose.
Nice demo. The problem is that brazing does not melt the aluminum itself. It is a soldering method. It is great for home projects, like I am doing. It is pretty tough. Now, if you look at the metal in the middle, where the two strips overlap, there is no material in between the two. To melt aluminum, we need a temperature of over 1000 F. Again, I love brazing, but I would not use it in a place where lots bending occurs. There you need TIG, where the aluminum melts and you just add the filler to keep the two joints in place. Brazing is great for lots of hobby use.
This is not welding. It's brazing. You should also use some flux which helps stop any oxidation taking place. It also helps the molten rod flow into the joint between the two plates. If this does not happen, then you are likely to have what is called a 'dry' joint and it will easily break. Contrary to what a lot of people think in these comments, brazing is not inferior to welding. When done properly, brazing can be as strong as a weld, possibly stronger depending on the type of material used in the brazing rod.
I have used the rods before they work good it's amazing how cheap it really is thanks for the content I subscribed as well. Hope you put out some more how to videos they really help people!
You’re having trouble with low heat because the steel vice is acting like a heat sink and drawing off the heat. Elevate your parts on something to fix it.
I have an aluminum car wheel that bit a curb and the "bite marks" are cosmetic do you think brazing them and then sanding them smooth would work or should I get it welded..the wheels holds air without any issues and the damage it near the lip that wheel weights would go but I use tape weights
Everyone says use MAP gas but theses days you cannot buy it anymore (at least in the tree hugging republic of California), only this stuff they call MAP-PRO which is just a fancy propane gas...
Wish you would have shown how strong this was. Doesn’t seem like a good joint. It looks like it could have a purpose but in no way a replacement for a welder.
Don’t need a big fancy machine, but you do need map gas, not propane, propane doesn’t get hot enough for proper bond. Check temps on y rods, and gas, and practice practical application, definitely need MAP gas. Yellow bottle.
@Mike Studmuffin propane will melt them. Not get the work hot enough to bond. Propane is 700 degrees, those rods require 750 to properly bond which you get with Map gas. Theres more than just melting it.
The correct way to fully fuse Aluminium together is to actually weld it, TIG A/C setting with a correct filler rod or A/C arc welding with a correct coated stick rod... The TIG route would be the way to go.....
@@williamdon3442 I will properly weld a cracked wheel for $50/hour, 2 inch crack is generally and hour or less and it gets you back on the road. I get diy, hell I diy stuff all the time. But this is a safety issue. This isn't a car part you want to mess with. If you send me a wheel with sealant in it, I charge extra for the cleaning process. Save money, just do it right.
I would not recommend that. This is essentially brazing... not welding, so is not as strong as an actual welded joint. BUt I suppose it would be okay for non-structural stuff on your bike, like mounting a water bottle bracket or something like that.
Please don't try to use this for a bike frame. This is NOT welding, this is a process similar to brazing and soldering. Think of the brazing rods like 'glue' - it's not metallurgically bonding to the components - rather it's sitting on the surface (and hopefully into pores/abrasions) of the components being brazed. It can produce a strong bond, but not nearly sufficient for the types of stress that a bike frame must endure. This could be used for cosmetic or low weight items like rack/light/water mounts.
I just finished using this stuff to put together an aluminum battery base. Its easy to stick clean aluminum together, but its just as easy to get a superficially bonded joint that cracks easily. Its very sensitive to application and technique and takes a bit more practice than this video shows. And while the tensile strength is allegedly higher than the base metal, the shear strength can be actually quite low, and I had a couple of joints split open without much force until I got the process down. So no, I definitely don't recommend it for any structural repairs on a bike frame.
Welding and brazing are two different processes. Welding involves melting the metal of your part and adding molten filler metal so the two parts become one. Brazing involves heating your part (but not melting it), so that it can receive filler material (brazing rod) through capillary action. The filler rod is not aluminum, but an alloy that melts at a lower temperature. In brazing the two parts have not become one, as in welding, but are connected by the filler material. Brazing is akin to soldering. It is a good application for ornamental metal work, or light duty applications. It is not appropriate for structural work. Thanks for the video.
Yeah I was about to say that to but you got it all covered 😂
so this video is on brazing for light duty oranmental repair ? I've pretty good crack in auto part . What do you think of repairing something like that ? It's where AC compressor is mounted to oil pan
@@frankmontez6853 I would think that for automotive applications a brazed repair would end up failing with vibrations, and most significantly torque, experienced by a compressor. In a weld the filler and joint are as strong as the part's material. In a braze the filler is not as strong as your base material.
My question is, can you braze a small leak in AC system in car?
@@hectorgarza228 Car AC systems are under pressure. I'm not sure if brazing will hold up to the pressure, but that's a guess. I don't have experience to know for certain.
Very nice instructional video. Very well thought out, very good verbal instruction and describing in detail what you were doing. One thing is instead of using Propane, I would use MAP gas which comes in the yellow bottle/canister. My father and grandfather were pipe fitters and anytime they did any soldering on copper pipes at home or on jobs they would use MAP gas because they said it burned hotter. Aluminum is tricky because it conducts and dissipates heat and cold really well, so getting the aluminum really hot might help the aluminum stay hotter longer and the Alumiweld to flow better. All in all a very good video. Thank You.
Thank you, I appreciate it. I will try MAP gas next time.
@@bo0stedracing MAPP gas
Alumiweld needs just 730F to work while most Aluminum melts anywhere between 800 and 1200F.
MAP reaches ~3700F while regular propane reaches 3600F
Having studied thermodynamics, 235W/Km is pure aluminums thermal conductivity at room temperature. Using the same weight and surface area aluminum, the energy (J) required , we can see the difference of gases. MAP heats up the aluminum faster, but the time it takes to melt said aluminum is negligible as 3700F vs 3600F starting from a surface temp of 70F and desired temp of 730F would take less than a second difference. Propane is significantly less expensive.
Also, being a DIYer who has used both gases in practice, the difference is negligible. There's really no reason to choose MAP over Propane unless you already have it or you're going to die without brazing that piece of aluminum in the spare second.
I am impressed with your "solder gun" for this purpose. I have long used a standard "solder gun" for plumbing, but you have to hold down the "start" button to keep the flame going. Your gun seems to have an "always on" switch which works great for this purpose.
😮😢
Nice demo. The problem is that brazing does not melt the aluminum itself. It is a soldering method. It is great for home projects, like I am doing. It is pretty tough. Now, if you look at the metal in the middle, where the two strips overlap, there is no material in between the two. To melt aluminum, we need a temperature of over 1000 F. Again, I love brazing, but I would not use it in a place where lots bending occurs. There you need TIG, where the aluminum melts and you just add the filler to keep the two joints in place.
Brazing is great for lots of hobby use.
Good job ....Never Knew you can weld like that ...Going Harbor Freight right now get one ....thnx
This is not welding. It's brazing. You should also use some flux which helps stop any oxidation taking place. It also helps the molten rod flow into the joint between the two plates. If this does not happen, then you are likely to have what is called a 'dry' joint and it will easily break. Contrary to what a lot of people think in these comments, brazing is not inferior to welding. When done properly, brazing can be as strong as a weld, possibly stronger depending on the type of material used in the brazing rod.
This is not brazing, this is soldering.
I have used the rods before they work good it's amazing how cheap it really is thanks for the content I subscribed as well. Hope you put out some more how to videos they really help people!
Thank you very much for the support, it is appreciated.
I'm honestly making a Panjo and need to make a spoon melt into the pan then tie the strings to it worked great surprisingly
You’re having trouble with low heat because the steel vice is acting like a heat sink and drawing off the heat. Elevate your parts on something to fix it.
Is it better to use a hotter burning gas like map or maybe even oxycetaline and do you need to use flux
How strong is the joint?
Great job thanks for sharing some knowledge 👍💯
I have an aluminum car wheel that bit a curb and the "bite marks" are cosmetic do you think brazing them and then sanding them smooth would work or should I get it welded..the wheels holds air without any issues and the damage it near the lip that wheel weights would go but I use tape weights
Everyone says use MAP gas but theses days you cannot buy it anymore (at least in the tree hugging republic of California), only this stuff they call MAP-PRO which is just a fancy propane gas...
That looks great! I’m all in!!
Wish you would have shown how strong this was. Doesn’t seem like a good joint. It looks like it could have a purpose but in no way a replacement for a welder.
Very cool
Thanks dude
Don’t need a big fancy machine, but you do need map gas, not propane, propane doesn’t get hot enough for proper bond. Check temps on y rods, and gas, and practice practical application, definitely need MAP gas. Yellow bottle.
@Mike Studmuffin propane will melt them. Not get the work hot enough to bond. Propane is 700 degrees, those rods require 750 to properly bond which you get with Map gas. Theres more than just melting it.
Thanks for the vid. Is the aluminium softer after brazing or does it recover its strenght? I wanna weld aluminium pipes to make a load carrier.
The correct way to fully fuse Aluminium together is to actually weld it, TIG A/C setting with a correct filler rod or A/C arc welding with a correct coated stick rod... The TIG route would be the way to go.....
Nicely done
Use aluminum or brass to brush aluminum
Steel imparts steel into the aluminum
Does it weld die cast?
Stupid question. Does one need to have a welding mask for this? Or just safety glasses? Sun glasses?
Awesome video man
Thanks, stay tuned more to come
Great job.
where does one purchase the welding kit?
I'm trying to delete/block off Rear A/C I wonder if I can use this method to weld the lines shot?
They are a 3/8 and 5/8 aluminum lines
Yes.
Which exact rods did u get from harbor
How well will this work for fixing rivets on a john boat?
I did the whole bottom rivets. NO leaks
That's not welding. That's brazing. Welding involves melting the metal.
I have tried these soldering method. The rod always turns into a blob. Never sticks to the surface. Always breaks off.
You aren't getting the aluminum hot enough. Apply the heat to the work, not the solder.
It is a good cheap method, but it's not welding.
how about cast aluminum?
Thank you dear
You’re welcome
Where we have to buy this and how much it will be cost
You can buy it at harbor freight or homedepot. It shouldn’t cost more than $30 for everything.
Would this work for a cracked aluminum wheel???
Please notify where we have to buy.
Anyone else screaming at him to turn his torch to the other side because he’s clearly NOT on the point he needs to heat
Cool
I am Argon welder no 1
Would a temp gun help this along?
A perm gun is better.
Thanks
Grasias 😅
I have a question, does anyone know if this method wold work to repair a small crack on an aluminum wheel?
ABSOLUTELY NOT.
I just typed the same question lol 😂
@@williamdon3442 I will properly weld a cracked wheel for $50/hour, 2 inch crack is generally and hour or less and it gets you back on the road. I get diy, hell I diy stuff all the time. But this is a safety issue. This isn't a car part you want to mess with. If you send me a wheel with sealant in it, I charge extra for the cleaning process. Save money, just do it right.
Do you think I could use this on my mountain bike frame??
I would not recommend that. This is essentially brazing... not welding, so is not as strong as an actual welded joint. BUt I suppose it would be okay for non-structural stuff on your bike, like mounting a water bottle bracket or something like that.
Please don't try to use this for a bike frame. This is NOT welding, this is a process similar to brazing and soldering. Think of the brazing rods like 'glue' - it's not metallurgically bonding to the components - rather it's sitting on the surface (and hopefully into pores/abrasions) of the components being brazed. It can produce a strong bond, but not nearly sufficient for the types of stress that a bike frame must endure. This could be used for cosmetic or low weight items like rack/light/water mounts.
I just finished using this stuff to put together an aluminum battery base. Its easy to stick clean aluminum together, but its just as easy to get a superficially bonded joint that cracks easily. Its very sensitive to application and technique and takes a bit more practice than this video shows. And while the tensile strength is allegedly higher than the base metal, the shear strength can be actually quite low, and I had a couple of joints split open without much force until I got the process down. So no, I definitely don't recommend it for any structural repairs on a bike frame.
How much.
You definitely have to spend a few extra bucks and get yourself some Mapp Gas, much quicker than regular propane and you don't waste as much
keep your camera closer dude !
You didn’t aluminum weld you brazed the joints and you have a cold joint because you didn’t have mapgas.
DO NOT WASTE YOUR MONEY----PLEASE
Is he using flux?
It’s not welding 😅😅😅😅😅😅😅😅😅😅😅
Welding is not brazing.
:48 - you say "welding"! This IS NOT welding! Learn the difference before putting out false information!
That took forever. And your result was not very good.
Wire brush should be a STAINLESS steel wire brush
Brass. Not stainless steel.
you should really practice be fore making a video, just saying
You not to good lol
Bullshit !!!! Braising is not for structural repair. Hack
😂😂😂😂😂😂for fucks sake, your trying to brass aluminum with propane. This is not the way