Braze vs. Weld

[@tejeshvaish17]

I am happy that you are still here , helping people . Thank you George

[@897473]

Thanks for commenting, Good to still be here. George Indexed categories of videos. gsegmedia.com/?page_id=4657

[@hidros1461]

Im 28yo been welding intermediate for 5yrs in the industrial mfg field. Today was the first time I ever heard of brazing. Thank you for the video!

[@wehrewulf]

Huh? WTF.

[@shotgunsmurf5740]

It really is more of an old school practice to be honest it's not nearly as common now as it was in the 80s and 90s

[@dmur612]

As a professional HVAC tech and welder... It’s always been a pet peeve of mine when people interchange the terms brazing and welding and even sometimes calling it “braze welding”. The succinct difference between the 2. Brazing uses a filler rod, a DIFFERENT metal than the parent metal, that melts at a LOWER temp than the parent metal to join parent metal(s), think “gluing”. Welding uses filler rod, a majority of its composition being the SAME as the parent metal, requiring melting BOTH the filler AND parent metals to join parent metal(s). Basically making 2 pieces of metal 1. “Gas” welding is just a class of welding that uses ANY type of flammable gas (hydrocarbon), usually also requiring pure oxygen, to melt the metals using an open flame. BTW, Nice work George...

[@897473]

David, yes terminology is a problem. So often we learn the wrong term and it sticks with us for life. I still call an adjustable wrench a Crescent wrench.

[@israelnieves2817]

Good information David

[@andriyshapovalov8886]

@@897473 There is no terminology problem. Its actually 3 things or I could say 4: welding, braize welding, brazing and soldering. The one you show is actually braze welding. Brazing requires tight clearances to take advantage of capillary attraction. To call it brazing you would have to buttit tight, preheat the joint and fill it in one or few points and let the brass FLOW....no dipping along the joint necessary. Its common industrial often automated process. For repairs though, like cracked castings you may not always able to use capillary advantage. So you may need to bevel the joint and welding technic to fill it up sometimes in a few passes...

[@897473]

@@andriyshapovalov8886 Seriously: You should do a video on brazing and braze welding. You've explained the difference in one clear and concise paragraph. My concern is that if I tried to do the same I would just muddy the waters. It's too easy to overload the viewer, but you've made it simple and straight forward. Thanks, George-

[@arayleche3468]

@@andriyshapovalov8886 NO! you are wrong. In technical terms it is very clear that Welding is different from Brazing and also different form Soldering. To recap it all, again Welding is joining for example two Same Parent or Base metals using a filler metal (welding rod) with the same composition as that of the Base or Parent metals being joined together. On the other hand, Brazing is joining for example two Same Parent or Base metals using a Different metal with lower melting point as a Filler metal (brazing rod), and Soldering is the same principle as that of Brazing only that you are using a Different metal with a Much Lower melting point than that of a Brazing rod for example a Lead as a Soldering material. When you say Braze Welding that is absolutely Wrong! What you mean maybe is Braze Joining, or Weld Joining, or Solder Joining of Parent or Base metals. Also to add to this, Spacing or Gaps has nothing to do with the definition or differentiation of the Three processes. I know for sure because I am formally educated with these processes.

[@897473]

For specific situations there is nothing better than arc welding. For ease and convenience the Mig is without equal. The benefit of the oxy/ace torch is that it is so versatile. You can braze, silver solder, weld, cut, heat, anneal etc. Thanks for the comment!

[@897473]

Electric welding is either with the Mig, Tig or Arc welders. Today, gas welding is not used much in industry but oxygen acetylene welding is an important tool in the small shop or the home shop. You can both braze and weld using the oxygen acetylene torch.

[@Spruce-Bug]

Is that because the oxyacetylene torch heats up too much? I guess if you were welding cast iron, the torch would be better than electric welders. keeping the pieces warm and slowing down the cooling process.

[@nicholstop8161]

I wanna learn to arc weld my dads got one but we can’t put it in our garage cuz it needs 3 phase

[@897473]

John, "Informative, no nonsense" I'm going to use that on my tombstone. Thanks

[@jerryanstey7058]

yes.

[@Dra6nheart]

I'm currently in a SMAW class and it's nice to see some videos showing comparisons and slowing things down like this. Thank you.

[@897473]

Thanks for commenting. Glad you like.

[@ateammama2]

Thank you for this video. I actually use soldering and brazing in jewelry making for much smaller scale sculpture and attachments. I appreciate your in depth explanation on the difference in strengths; as well as your appreciation for the artistic value a bronze brazing can add.

[@Themadfranklin]

Very informative and easy to understand. You have shown precisely what I have been trying to learn without the benefit of a shop teacher. Thanks for the well produced and thoughtful insight into the differences between the two. Try asking the average shop guy the difference and nobody seems to know the real answer.

[@897473]

Franklin, thanks for viewing and commenting. Glad the video was helpful.

[@saintmichael36]

I'm sure I don't have to tell you this but you do a wonderful job on your work and explaining how to do everything in your instructional videos. Don't pay any attention to the negative comments you receive. That's the problem with the Internet. Cowards that make negative comments about someone's hard work don't have to take responsibility for things they say. Funny how what they say would change if they were standing in front of a class room. If your not here to learn from these videos, then

[@darcymunro8930]

I look at your work and see workers who are training people to have more knowledge about doing things that is more important than the technical people who know theories and do nothing. Keep up the great job you are doing.

[@897473]

Thanks Darcy. Appreciate the comment.

[@darcymunro8930]

George Goehl How have you been going,I love your work ,and learn so much .keep Strong.

[@robertsingleton1187]

them hands have some miles on em

[@897473]

+robert singleton Yes, these hands have served me well.

[@897473]

+Stephen Bennett Stephen, it could be a number of things. Check you tip and be sure it is clean with no obstruction. Try changing your mixture of oxygen/acetylene. Example: Turn the knob so you get a bit more acetylene or oxygen. May have to increase the pressure at your regulators. May have to hold your torch in a different position so the sparks don't fly up into the torch tip. Maybe holding the torch too close to the work you are welding. Try varying the distance between the blue cone anyou are d the metal you are welding. Make small adjustments. If and adjustment increases the popping, try the opposite. Let me know how it works out.

[@brendenbuck5811]

That's how you know that he knows what he's talking about

[@897473]

I've never heard that. Most of the sculpture I do is clear coated (painted) either with a clear lacquer, clear acrylic or clear enamel. I've never had a problem with paint sticking to brazed joints. You may want to check with some auto body forums. Thanks for the question.

[@897473]

I am not sure exactly which video you are referring to. Clean metal will always braze or weld better than rusty, oily or paint covered metal. I do tend to clean up any metal before welding or brazing. It saves time in the long run.

[@xstraightedgechrisx]

Took a welding class last trimester and got the braze first try, as oppose to having a very hard time with Arc welding. Wish I could braze some more.

[@JohnHampton]

Informative, no nonsense presentation; and that voice - deep and succinct - a pleasure to listen to. Thank you.

[@kensendelofski3761]

Used to do this in welding class back in 1975 to 1977. Plan on starting again. Doing auto body work. Thanks for the video enjoyed it

[@897473]

You might be as little rusty, but the skills you had then will come back with a little practice.

[@Pete4875]

You do a good job at gas welding, a lost art!

[@897473]

@tmtx7 I use copper, brass, bronze & steel. All those metals can be brazed to each other.

[@897473]

Not exactly sure what you are referring to. There is a "gouging" tip that goes on a oxygen acetylene cutting torch for cutting out rivets. I've never used one so i am not a good source of information. "Sound Metal" again, I am not sure what you mean by "sound metal". Sorry, I am not much help for your question.

[@onlyonemrxonlyonemry306]

I will never be as good as you.

[@897473]

You got two years head start. i didn't start until I was 27. Embrace your mistakes, they are your best teacher.

[@897473]

Yes, there definitely is a difference between Arc and brazing. It's often said that someone who can braze well is apt to pick up Tig welding fairly quickly.

[@897473]

Depends on the frame material. If it is steel you can either braze or weld. For a better answer I'd suggest going to a bicycle forum.

[@noreservecars]

Looks like great fun. I've done some welding with a Henrob torch many years ago in an airplane building workshop. I never did get a chance to do it much, though. I always meant to go out and buy a torch. This looks awesome. I'll have to buy your videos and some equipment and go play. Thank you very much.

[@897473]

Brazing with bronze brazing rod is stronger than any kind of solder I know of. But I'd suggest checking with someone else because 99.9% of my experience is with bronze brazing rod. For my work strength isn't that important. Obviously I don't want anything to fall apart but I am doing wall and table sculpture which is going to be hung on a wall or set on a desk or table. There is no stress on the joints.

[@897473]

If I am using my spray outfit, I use clear lacquer. If I just want to spray a small piece I will reach for a can of aerosol, either acrylic or enamel. There are all grades of paints and coatings. Generally the more you pay the better they are, although that is not always the case. For more technical information you need to find a forum that deals with the chemistry of coatings (paint).

[@cyberdemigod]

Also I forgot to mention, That is some mighty fine welding you have there sir.

[@897473]

Currently I don't have a close up filter that will show the molten puddle for brazing or gas welding.

[@TheNuggetshooter]

George, you say above that the blue cone never touches the brazing rod. Then, whee do you put it to braze? Is the blue cone then behind the brazing rod? I am trying to figure out where to put the brazing rod into the flame to get it correctly positioned. Great Video. I will have to go back and review your DVD on this again. Always great videos and E books.

[@897473]

Difficult to say without seeing the weld. Things you might check: 1) changing your speed of movement as you progress through your weld. 2) keeping the same distance between the torch and the metal. 3) Melting more or less gs rod as you move along the weld.

[@897473]

Thanks for the comment. I only use Mig for welding steel. I'll be anxious to hear about your results running silicon bronze.

[@Bigpoppi1469]

you should narrate for documentaries on pbs & such.

[@897473]

Thanks, if I was 40 years younger I might consider narrating for documentaries. As it is, I have my hands full just doing what I'm doing.

[@897473]

You might consider a flux cored wire feed welder. I have customers that are using gasless flux-cored welding from Harbor Freight and are pleased with the results. These are relatively inexpensive.

[@wilkbor]

Thank you for the video, which explains something I really didn't understand. My next question is that if welding is so much stronger than brazing, when would you use brazing as a preferred technique to connect two pieces of metal? Thanks again, KB.

[@897473]

Gas welding most often refers to welding steel to steel. (Although there are exceptions). I use brazing when I want to attach copper to steel, copper to copper, copper to brass, copper to stainless.

[@midgetman4206]

More fuel options? I only know of 2 that can be used to weld (acetylene and hydrogen), but there are way more that can be used to braze and those also tend to be more affordable.

[@897473]

I thought I had a KZbin video titled How Close to Hold the Torch. I am putting an older video up on KZbin today. I think this will answer your question.

[@not2fast4u2c]

thank you for this video I braze when I make my bicycle frames and can always learn more about it

[@JohnSmith-bq1sj]

Very nice, clear to understand!!

[@rayceeya8659]

Yeah, that's about how my brazed joints look. I hate brazing. Going from welding to brazing is like someone jacked up your power on your welder and now you have way too much heat. That was a common practical joke when I was learning welding. When it happened to me I just moved the puddle faster. Thing I couldn't stand about brazing is you have to be way too precise on your temp. I still remember that first time I touched brazing rod to the piece of mild steel I has so carefully preheated and then sploosh, molten brass everywhere. It runs really fast and I could never get my puddle control down.

[@897473]

And thank you for watching!

[@897473]

Thanks for your comment.

[@BillPalmer]

good instruction, thanks. It would be nice if there was a way for the camera to see into the bright flame better. Thanks much!

[@897473]

Appreciate the comment.

[@cyberdemigod]

This is exactly what I was looking for, great explanation and demonstration. I hope to see more videos so informative

[@897473]

A good weld is stronger than a good braze. Whether you should braze or weld depends on what you are working on. I'd need more information to give a better answer.

[@noreservecars]

Can the Henrob torch do everything a Smith torch can? I was thinking of buying a Henrob since that's what I learned on.

[@ClownWhisper]

I absolutely love brazing I always have since I was a little kid in junior high first learning it I loved it and my teacher came up to me and took me aside and he said I have never seen any student is good at breezing as you he said don't tell anyone I told you I will deny it because he didn't want me to**** *** any of the other kids. But that teacher changed my life he made me feel like I could do something and I was good at something I had very low self esteem before that teacher took me aside and after he took me aside I felt like I could do anything that I set my mind out to doing he really made a difference in my life and I'll never forget him

[@marynollaig4124]

I would think brazing is useful where it is important not to melt the parent steel. I sometimes fabricate shapes by dovetailing smaller pieces into the larger main part. Silver solder or bronze filler gets into the joint by capillary action which makes it look like an original one piece forging.

[@897473]

I'm pre-heating the metal to be brazed. There is no way to keep the over all flame from touching the brazing rod. The blue cone however, never touches the brazing rod. If you have a different method and it works for you - then stick with it. 897473 3 hours ago

[@robertcece6972]

I'm not a welder but trying to learn the basics. My question is, how the hell does the bronze hold the steel together if you're not actually melting the steel? That doesn't make any sense. It sounds like brazing is more like "metal glue". And if you tried to bend those 2 pieces, wouldn't the bronze snap right off? Just because the steel was never melted to the bronze?

[@897473]

The best answer to your question can be found here: en.wikipedia.org/wiki/Brazing

[@alext9067]

I see your point. It would seem crazy but that's the way the world is. Soldering is the same way. Silver soldering is similar. Brazing is the same again. When both metals are heated, a magical bond is made. Don't underestimate the strength of these bonds. Silver soldering can be done w/ a butane torch of all things, and it is very strong. The Wikipedia suggestion is a good one. It's my go to source.

[@Barry7777777]

It forms a molecular bond without needing to melt the steel - and a molecular bond is a molecular bond, usually stronger than the material itself.

[@smalltownplaya712]

you are basically right, it is kind of a "glue"...braze uses "capillary action" , the base metal just needs to be hot enough for the braze to "seep" into the base metals....it is pretty strong actually, and less "brittle" than a weld so it handles vibration a bit better...cast iron comes to mind...it is very brittle and difficult to get a good weld, so most just braze it and it works well.

[@897473]

Appreciate the comment. Will try to keep them coming.

[@williesimpson6757]

You adjusted the flame differently for brazing

[@luciusirving5926]

I heard about this brazing process called "MIG brazing" which I think would be a good idea for sticking pieces of titanium together. I hear it works quite well on steel and that the MIG braze has great tensile strength. Gotta get me a GMAW rig and a silicon bronze wire spool+oxyacetylene tanks for preheating and postheating on metals. As for the video tyvm and great job!

[@TLS912]

I wish you had a #5 lens on the video camera. Would be much easier to see the flame and puddle

[@cjrouse9508]

Love the video, just passed my millionth joint brazed as an industrial hand brazer.

[@897473]

Wow, you are a brazer. Curious to know what you are brazing. I'm sure that your brazes are a lot neater than mine. Bet you've got some tips you could pass along.

[@cjrouse9508]

@@897473 I work for a company called Thermal Transfer, we make heat exchangers, which are pretty much identical to the condenser packs HVAC guys work on. The majority is copper on copper, but we do copper-brass, copper-steal, pretty much any metals they throw at us. Just 10 hours a day, 5 days a weak brazing about a 1,000-2,000 joints a day. leak percentage has to be less than 1 per 250,000 and they have to look perfect, no runs and a smooth consistent finish.

[@cjrouse9508]

@@897473 as for advice: Higher heat for shorter time, we don't don't do a lot of pre-heating as we try to keep the overall strength of the system high. Heat too much and the copper over anneals and it bursts about 500 psi sooner than a unit that was brazed faster. (less heat is also a must when trying to braze when the joint is not perpendicular to the ground or the material will run to the bottom leaving the top barely covered. ) Also for the strongest joint you want the filler material to penetrate 3 times the thickness of the thinnest material you are connecting. You want to do as much as you can in one pass, the more you heat and more you come back to an area the more it runs, and the more likely you will develop a crack in the filler material (most common cause of leaking is overheating the joint/ other than just missing but that is fixed with practice) I prefer using 2% silver when brazing copper to copper or copper to brass. 18% flux cored rods for copper-steel. If you are looking for a pretty joint you make one pass to fill the filler material into the cavitation and a second pass with the flame further away to lay a nice smooth ridge around the joint. we never lay a glob of filler material and use the torch to spread it,, the best joint comes from laying rod right where you want it to go rather that coaxing it to move with the flame. However if you are working in low pressure system I'm sure you can get away with more. The proper air-fuel mixture is probably the greatest influencer on how easy it is to braze, a bad torch can make it near impossible to get consistent results, so a consumer grade propane torch might work, but it will make even a pro look like a greenhorn. I've never met a joint we couldn't braze no matter how dirty or what materials they want us to combine, we have joined razor blades together without melting them, we found an old steel fitting under a shelf that was almost indistinguishable and without cleaning we were able to braze it to a copper tube with just the 18% so while cleaning really helps, id say the filler material is even more important. sorry for the book, just never thought this information would be useful to anyone else.

[@cjrouse9508]

Ah and as for PPE, (leather gloves, denim apron, and darkening glasses you will go blind after staring at that flame too long)

[@897473]

@@cjrouse9508 Thanks for this. It is going to take me some time to digest all of this. Appreciate you taking time to spell this all out.

[@tito1rocks]

Is that John Goodman?

[@pmessinger]

no

[@jkutnink87]

Question I have is this... is brazing kinda like when plumbers do piping? They are not heating the copper to insane melting temps but they are using another easier to melt metal to "braze" them together correct?

[@897473]

Plumbers are soldering. Much lower heat. Can be done with propane, Here is a video on soldering copper pipe: kzbin.info/www/bejne/ZmmooIpqpNuEgbc

[@markharris5771]

Am I right in thinking for a total noob who only wants to make small artefacts, and has limited room for a metalwork station a mig welder is the way to go? Your welding looked amazing to me, I won't be looking to do that quality for a while.

[@897473]

You got me! I've never heard of these terms. You might try American Welding Society (AWS). They have a web site.

[@whyturtleracer]

George, thank you for sharing your knowledge with the rest of us. In your gas welding show and tell, were the subject pieces cleaned of the mill scale? I noted that you placed much importance on cleaning to bare metal for the braze example. When you get time.Andy

[@lesko50]

So is brazing with the rg45 basically the same as stick welding ?

[@JosephMelia]

Thank you,excellent instruction... I want to make a pannier rack in order to fix an ammo box to my motorcycle.... Would this type of welding,if correctly done, be suitable to hold the metal together for such a task? I suppose it would heavily depend on the weight of the loaded pannier/rack and the quality of the weld.

[@897473]

Joseph, if it was me I would braze either mild steel or stainless steel rod. You could use flat material, but I generally think of panniers being made of rod (round). Brazing would be easier than gas welding unless you are very familiar with gas welding. If you haven't done much brazing, buy a little extra rod for practice.

[@JosephMelia]

@@897473Thank you for your prompt reply and useful advice...I will be sure to take that into consideration.

[@carolholder2916]

Hola exelente técnica mi pregunta es si lo que se hace con cobre aplica a la plata 🤩

[@normanwjames]

Thanks for an excellent video! I had a question about brazing filler material: What is going to be the joint strength difference between using brass vs a high-content solder? I know there are perks to each (cost advantage to brass, lower melting temp for the solder), but what are the differences in strength? Thanks again!

[@flash001USA]

Thank you for this simple straight forward tutorial.

[@dirtyjeansjenkins]

i was always under the impression in brazing you wanted to have the brazing rod follow the torch, and never let the flame directly contact the brazing rod, is this an incorrect impression? it seems you do it the other way.

[@897473]

I have never used Mapp Gas so I can offer no information. There are KZbin videos on Mapp Gas. I'd suggest checking those out.

[@whez08]

What would happen if you didn't use the steel rod on the steel plates, if you just melted and fused them together would it be any less quality of a weld? Thank you for the informative video.

[@897473]

Melting the plates together is called "Fuse Welding". Theoretically, fuse welding is not as strong as gas welding where a filler rod is added. Of course, a good fuse weld is going to be stronger than a bad filler rod weld. If you want to get very specific, you'll want to to explore weld testing.

[@MrSunrise-]

The no-filler joint is also known as an endogenous weld. Friction and spot welding pretty much universally use endogenous welds; in some sheet metal applications, endogenous welds created with GTAW or OAW processes are used with excellent results. However, for the sample coupons shown here, I would recommend filler every time.

[@bbymasterson]

call me crazy but im trying to make a personal firearm. .22 semi auto hand gun. the project is just to see if i have the skills to make it. the parts i would weld or braze would undergo shock and heat. hows that for more info?

[@dz2992]

Thank you. I found your video very insightful!

[@897473]

I do appreciate the comment. A few people, and I might add a very few, like to get their two cents in without taking any responsibility. We have no idea what their lives are like. Maybe if I was in their shoes and living their life I would be just like them. Hopefully not.

[@jenf1368]

No problem. I should have asked what does backgouge or back-gouging meant instead. I often see that a lot in welding books.

[@Mrrickes]

can you braze with a map gas torch and A copper rod. I know that you should use a oxy acetylene torch but can u.

[@vimaljks]

Hi George am trying to braze with a butane / propane tin a empty gas tank with a little hole in it. The braze or brass braze rod does not melt ..do I need to change gas type in mapp?

[@897473]

I'm guessing that you do not have enough heat for the rod you are using. You might try using silver solder or SIL-FOS which has some silver content. Both of these will melt at a lower temperature than standard brazing rod. I've never brazed with butane so I just giving my best guess.

[@Dennis-gr2fx]

Hello George. May I ask if it is possible to braze with an ac arc welder? If so is there a type of rod with flux or separate flux to use with the ac welder? Thank you. Very nice informative videos.

[@897473]

Yes, you can braze with an arc welder using Carbon Arc. It has been years since I have done this so I am not a good source of information. Here is a KZbin video that explains the process. kzbin.info/www/bejne/eorRpHaOi9h9qdk Plus there are other KZbin videos which will get you acquainted with the process. Here is some more information: www.iforgeiron.com/topic/32390-using-a-carbon-arc-torch-for-brazing-and-heating/

[@FabioAlvaato]

George Goehl hello george, do you think its possible to weld togheter a pulsejet using brazing without making it melt when using it? A pulsejet gets around 700 degrees celcius and the rod i am planning to use goes up to 900?

[@Dennis-gr2fx]

George Goehl Thank you so much for that George

[@897473]

Fábio Alvaato Fabio, For the work that I do I use standard off the shelf brazing rods. You might want to look at some specialty brazing rods. www.weldingrods.com/ Or you might try silver solder. Depending on the grade it is almost as strong as brazing and it melts at a lower temperature. What you want to do is outside the normal day to day brazing. You may just have to do some experimentation on scrap pieces of metal. Sorry I can't be of more help. George

[@markrcca5329]

Would it create a strong join, joining a piece of brass to a piece of non-stainless steel? Would that be also called "brazing" ? Would the special filler brass be required, or can the brass piece itself be brazed directly onto the steel? This would be a relatively small piece of brass (1/4 inch thick, 1/4 inch wide and 1 inch long), and joined lengthwise to a long and thin steel rod (1/4 thick, 1/4 inch wide, 2 feet long). Perhaps the brazing material itself can be used as the brass piece? The 1 inch brass piece does not need to be a hard metal; it can be quite soft, it's fine if it is easily scratched, but it should be flexible and not brittle.

[@897473]

Mark Rcca For brazing a standard brazing rod is recommended. You will need to use some flux if you are using bare brazing rod. For information on flux, check here and scroll down to you find the video on flux. gsegmedia.com/?page_id=2877 If I was doing it, I would play the flame back and forth over the brass and steel to get an even heat. If the steel is red hot and ready to accept the braze, but the brass is not up to temperature, it will not give a good braze. The reverse is also true. The main caution is that you do not want to get the brass or steel to a melting point. For me, it would be best to have a couple of pieces to practice on.

[@markrcca5329]

what alloy would be best? I would prefer without lead and without phosphorus.

[@897473]

Mark Rcca I use standard off the shelf 3/32nd flux coated brazing rod. Check with your local or online suppliers. I'm sensing that you want more technical information than I am able to give. I'd suggest checking on some metallurgical web sites. You might also check with a university in their welding engineering department.

[@markrcca5329]

George Goehl since I have no experience with brazing, after I saw the contents of the compounds I was concerned with the phosphorus and lead in the alloys, since essentially I will be making a handle to a sporting tool, and not too keen on rubbing the phosphorus and lead onto my skin.... especially the phosphorus... thanks for your help and advice!!

[@redhongkong]

is there a requirement on the torch attachment for brazing? possible if i just use kitchen propane torch to braze some galvanized steel sheets?

[@897473]

I don't braze galvanized steel because of the fumes. "Zinc oxide fume generated during Joining-galvanized steel by welding, if inhaled, cause the metal fume fever. Although non toxic, the symptoms from breathing such fumes may debilitate affected persons for 24 to 48 hours". Source: www.welding-advisers.com/Joining-galvanized.html

[@andriyshapovalov8886]

This is actually a braize WELDING. Brazing rely on capillary attraction, so it requires tight joins. Think of copper pipe sweating. It would be a type of brazing called soldering. It suckes the solder into the joint. If you have to dip the rod all the way along the joint it's braze welding, which often also requires joint prep such as beveling... Brazed joints generally stronger...

[@897473]

You are absolutely right. However, since my videos are for the beginner or just curious about the difference, between gas welding and brazing, I've tried to keep it simple. For those wanting more technical information I often refer them to the American welding Society. Thanks for commenting.

[@brxtmp106]

I need to add an extension to a torsion spring arm. I'm thinking that brazing will be a good application since the metal rod of the spring will be possibly annealed but not brittle as a weld might make it. Am I correct or should I consider welding. Either will be using Oxy/Acetylene.

[@897473]

Personally, I would braze. If that doesn't work out you can always grind off the braze and then weld.

[@steviee03able]

Would brazing be a good method of joining an aluminum or wrought iron fence to a post? Or would a different form of welding be better?

[@897473]

+Steve Sandoval Steve, I've never worked with aluminum so I can't help you there. You don't say what material the post is. Just off the top of my head, I'd be looking at bolts and nuts or if the post is wood, heavy lag screws.

[@minktrappingpaddy]

Is it possible to gas weld small diameter round bar to thin metal sheeting using gas welding? If so, what type rod would be suitable for the job thanks

[@897473]

Yes,, definitely possible. I'd use 1/16" RG 45. Standard steel gas welding rod. You might consider brazing. Brazing requires less heat so the sheet metal is not going to warp quite as much as with gas welding.

[@skbrazing]

I like your explain about brazing and welding.

[@897473]

Thanks for commenting. I'm doing a KZbin video on a gas saver. Can you get me some information on the SK Brazing gas saver? Please send to: [e-mail]

[@tmtx7]

great vid. can you join steel and copper?

[@peterford9369]

What I mean is, you put the rod ahead of the flame. Vs running the torch ahead of the rod. I've watched several videos and no one explains that part. thank you.

[@897473]

Now I am not sure what you are asking. If I have the torch in my right hand and the rod in my left. Most generally I move from right to left. The torch flame is heating the metal to be brazed or welded and is ready to melt the rod when the metal is up to brazing or welding temperature.

[@alano1]

I've been trying to solder my leaky copper water feature but so far no luck. The seam at the corners of the copper tank are separated and I tried using regular solder with flux but it's not taking. The solder just drip onto the ground instead of getting sucked into the joint. Since it's the corner, I don't have any way to brace the 2 pieces together for a tight seam, and the gap is about 1/8". Should I try brazing instead? Hope my explanation is clear. Thank you George.

[@897473]

Is "copper water feature" a fountain? The copper is probably not getting hot enough to accept the solder. You'd probably have the same problem with brazing. Personally, I would use a good quality clear caulking. Other options would be J&B Weld or a 2 part epoxy. Any of these available at local hardware or builder's supply.

[@alano1]

Hi George, appreciate your quick reply. Yes, it's a fountain, but i have empty out all the water. I think the copper is getting hot enough since it melts the solder when it's in contact with the copper, but it's not sticking. Could be that I didn't sand the copper clean enough. Anyway, I think I'm done with trying to solder. I'll try your suggestion of the 2 part epoxy or J&B Weld. I've used that before and am more comfortable with it than brazing. Have a great day and thanks again George!

[@Jpcars636]

What gas was used

[@dhruvparmar4061]

Superb technical knowledge that we can't learn in class

[@TheArgentlion]

this is prob a really dumb question and if it is I am sorry, is there copper brazing rod or is all brazing done with bronze? Eventually I am going to need to braze brass and bronze and perhaps some copper and I am in the beginning stages of gathering equipment as I figure out what I need and dont need.

[@897473]

+M. Coty Kannon Actually, that's a very good question. If you go into your local welding supply and ask for some brazing rod, they'll sell you either bare bronze rod or flux coated bronze rod. Copper is 99% pure copper. Bronze is an alloy, meaning that there is more than one metal. Bronze is copper and tin. You can also just braze with copper wire. A little bit different than brazing with bronze brazing rod, but ten minutes of practice will get you up to speed. Brass on the other hand is an alloy of copper and zinc. If you go into your hardware and buy a brass rod, it will not braze like using copper or bronze brazing rod. Once you get beyond brazing with copper wire and bronze brazing rod, you are into speciality alloys and there are lots of these for specific applications. Hope this helps. .

[@897473]

+M. Coty Kannon Forgot to mention - here's a video I did using copper wire for brazing: kzbin.info/www/bejne/o2eaaWCZodWVoNk

[@shogunMR]

Which one of these is best for sheet metal say for floor pans on a car or patch panel or rocker panel on an older 70s car?

[@897473]

Because of the broad flame, with an oxy/ace torch, sheet metal is going to warp. Which is why body repair is usually done with a mig or tig. I suggest posting online to an auto body forum for suggestions.

[@shogunMR]

@@897473 thanks buddy

[@897473]

I thought I had a video titled How Close to Hold the Torch". I an=m uploading a copy that may better answer your question. If doesn't answer your question, let me know.

[@SP-mp9yi]

Hello I have a question, What is the best system for sheet metal ? Weld/Braze gas mig tig etc ? I’m wanting to do some classic car repair and try to save the original panels by filling them rather than cutting them out. Any Thoughts ?

[@897473]

I don't have any experience in auto body repair. There are forums for auto body that will be far more informative and will suggest the best way to go about doing what you want to do.

[@SP-mp9yi]

George Goehl OK thanks

[@laylacherie6925]

i love the videos. i am still learning. as a student i have a imortent ? for u. your are u not wearing gloves when holding a the rode

[@897473]

Kayla, glad you like the videos. The rod I am holding is not hot. In brazing, the rod will finally melt down and then I will melt that rod (short rod) on to a new longer rod. If brazing with a heavy duty torch, then I may wear gloves.

[@donaldmann5010]

Good information, thanks. I've never seen it done to see the differences. I hear differing opinions from the metal supply houses. Can 260 or 360 brass be butt brazed? I'm doing a crafting project that would use .063 sheet. I guess I could slip a thicker plate under the seam if that would help... I'd prefer 260 because it is easier to cold form. Also, how easy can you grind a brazed joint down smooth, or can't you? **apologies if you've addressed this elsewhere

[@897473]

Just saw this post. I don't work with a lot of brass. I'd suggest looking at sites like this: www.speedymetals.com/information/Material79.html

[@1242chisox]

When i gas weld, the welds start out convex, then they go flat. What am i doing wrong?

[@navilmartinoli]

Great video! One question, would it be better to weld or braze together a bike frame?

[@kanemeasham-pywell92]

Weld due to high stress on the joints especially near the head tube

[@Jim58223]

Do you still move your torch in a circular pattern when brazing with bronze?

[@897473]

Moving the torch flame. In some cases you'll want the swirl pattern like you get with a weld. In other cases you'll be using the flame to not only do the brazing, but also to move the melted puddle of bronze in the direction you want. Here are a couple of videos which may help. kzbin.info/www/bejne/j6uqm32jjNh5e6s kzbin.info/www/bejne/nmHZeqmfpbyJq7s

[@Jim58223]

Thank you.

[@jasonparker5746]

Shit! I forgot to put my welding helmet on before watching this...I am going to go blind!

[@897473]

IF you are brazing you need dark brazing glasses. If you are gas welding you need welding goggles. Both are available online or at your local welding supply.

[@pmessinger]

You chose to shit. Be more careful. Now you know.

[@johnfraser8158]

so you brazed without flux? Is that for effect? When using flux it really leaves a lot of extra scum. Do you not use flux to avoid the scum?

[@897473]

+John Fraser John, most always I am brazing to all new material so I don't need a lot of flux. For a more detailed explanation on the way I use flux, go to this page and scroll down to "Using Flux for Oxygen Acetylene Brazing". gsegmedia.com/?page_id=2877

[@johnfraser8158]

+George Goehl thank you very much

[@peterford9369]

George, I am thinking about making a T wrench for my acetylene tanks. I know you know they have a #5 square shut off. My question is,do you know if you can buy rolled steel square tubes that small? I have a 40cf acetylene tank for my plumbing work and also a small oxyacetylene torch rig with a 10cf that both have the same shut offs and am tired of loosing those cheap little wrenches. thanks George.

[@897473]

Peter, I've often misplaced the wrench and have used a small pair of vice grips. I'm sure there is square tubing that small, but where to get it is the question. I would imagine that most square tubing that small would have a thin wall. There are such things as square wrenches, called gear wrenches. I'll think about this some more. www.homedepot.com/p/GearWrench-1-4-in-x-3-16-in-Square-and-9-16-in-x-1-2-in-Hex-HVAC-Quad-Box-85221/202763317?MERCH=REC-_-PIPHorizontal2_rr-_-202763307-_-202763317-_-N

[@peterford9369]

George Goehl Thanks George, Guess I'm also looking for a more convenient wrench like the T. Just happens noone sells that#5 size. Forney carries the 1/4 and 3/8s but not this small size. The biggest pain with the little box wrench is with my small oxyacetylene set. Getting a box wrench into the jumble between the tanks is a pain. T wrench would be perfect. I was thinking a socket style head brazed onto a small brazed T might work. Wasn't sure rolled steel would hold up anyway,, unless the wall thickness was decent. Thanks George, will keep up the search.

[@Xynudu]

Good video but you failed to mention the benefit of capillery action when bronze brazing being able to penetrate and give complete coverage/bonding of matching broad surfaces. Weld can only do the edges same as electric welding. Thus while bronze is not as strong as weld in the application shown, in a different scenario bonding flat surfaces bronze is far superior.

[@897473]

Thanks for commenting. I agree with your comments, but what you are suggesting is more for a course on welding /brazing which is beyond the scope of these short introductory videos.

[@Xynudu]

OK. Fair comment George. I just thought you may have mentioned the capillery action and effect of brazing. It's the primary reason I bronze braze. I know it's hard to keep videos short - same issue here. Cheers Rob

[@897473]

I've thought about doing a video on "brazing" and "braze welding". To say capillary action is one thing, but to demonstrate it is quite another. I once saw a video where two pieces of glass were held tightly together and dipped in water. The water seeped up between the two pieces of glass through capillary action. The challenge in a video is how to demonstrate this so that it provides a simple Explanation rather than seeding Confusion. I'll probably just shelve the idea and go on to something else. Again, I appreciate your comments. George

[@Xynudu]

Hi George, You would have to braze the two pieces together and then saw through in several places to show the capillary penetration - much like cross sawing a weld bead to show depth etc. While capillary action is good, a method I use, is to bronze coat (tin) both surfaces and them put together and heat up to re- melt and get a known 100% full bond. Relying on capillary is not a 100% certainty of getting full coverage. But I expect you are well versed in brazing and know all this. These two subjects could however make for interesting videos on your channel. Cheers Rob

[@897473]

Interesting concept. I'll have to give those two videos some more thought. Thanks!

[@chrisdelacroix1231]

I remember doing this in a welding class back in '97. Haven't welded since. Bummer.

[@897473]

Maybe you'll come back to it one of these days.

[@chrisdelacroix1231]

I'll look up a local school. I was in a six month Industrial Maintenance class at the local community college. Got a job in a plastics manufacturing plant and went up the ladder in four months to supervisor. Never used the welding sorry to say.