🔥 Gas Welding with Filler Wire
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- Опубликовано: 12 сен 2024
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Hi Bob;
I have been welding O2A since 1973.
The "Sparkles" indicate to me that there was a bit to much Oxygen. You mentioned that you didn't quite have enough heat so you added oxygen.
Technically, since you didn't add more fuel there shouldn't have been any more heat.
Ah, but there was more heat with the extra O2. The extra heat was from using the Iron as the fuel, not good. The sparks indicate this and can easily go back in the tip and cause a pop.
The correct thing to do was add more Acetylene and then adjust the O2 accordingly.
You don't want the sparks, maybe a few, but not the 4th of July.
If the gas velocity is to high, ie blows the puddle around to much, step up a tip size.
A trick, sometimes, is you can use the welding tip as a tiny Cutter by purposely adding extra O2. You then definitely get the Sparkles.
redrok
redrok.com
duane acetylene air.you ever tried to wire weld small mild steel projects with it?
You sound very professional sir I keep blowing through my puddle and could you throw more light on the best pressure ratios to use please.
@@gabiladarlington1456Generally, you’d want a 1:1 ratio with your working pressure of gases. So if you’re using 5 psi of acetylene, you’d want to match that with 5 psi of oxygen. The instructor mentioned using 3 acetylene and 5 oxygen, which buddy over here was explaining the cause of the sparks and backfire. You commented a month ago, so I guess you’ve figured it out by now.
Thank you!
Legend
I grew up next door to a junkyard and it was my playground when I was 8 the old man Smitty who owned it got tired of chasing me out and calling my parents decided to put ne to work as an agreed form of punishment, wink wink between he and my parents so it started by sweeping up the shop and being a yard gopher and by ten I was doing oil changes flat tires light bulbs etc. one morning during the summer he was yelling and cursing up a storm while trying to gas weld the frame on this tow truck I ran over and saw his hands were shaking up a storm trying to hold the torch and filler rod and he couldn't get a puddle going so I offered to help by holding his torch hand and he said "hell no you lil bastard" and made me get gloves and goggles from the shop that didn't fit what so ever but that was the day I welded something for the first time and from then on I welded everything that came into the shop or whatever he broke and over the years he taught me everything he knew. he was my best friend and th closest thing I had to a grandfather until he passed away when I was nineteen but it's because of him I became an ASE master technician gas and diesel and can weld just about an metal using gas, arc,mig and tig Thank you for this vid it reminded me of Smitty, growing up nd I can close my eyes and smell that old shop!
Mud - great story. You went from being a PIA to best friends. You're a lucky guy - sounds like Smitty had a good heart.
Mudsuitable, that was an awesome story, thanks. And thanks to and good job to Smitty. Sometimes ya just need someone to show you a little something to fall in love with it...... Kinda reminds me a little of Gran Torino a bit with Eastwood..... butcha know what, We all need folks like that to drive us a little and hopefully teach us stuff too. Good on you bud, That was indeed a blessing.
Awesome story, gotta appreciate the old timers showing us a thing or 2. I was 13 when I started playing with my dads welder in his shop. I fell in love with welding and even went to a welding school as i was off to the races... 17 years later and with tons of certifications under my belt I'm welding for the railroad and always look back thinking about my dad giving me a chance to learn something when I was a kid. Til this day he's still my bestfriend and still teaching me things. Your story of Smitty reminds me of my dad thanks for sharing
If you can buy his old place and keep it going, one day there or not, your have a young buck to school and help along. One day he will say the same about you.
Mudsuitable ... awesome story. And we need more Smitty’s out there. I hope to be a Smitty to my son...once I get my forge going, I’m pretty sure he’s going to want to learn right beside me.
I took an ROP welding class junior year in high school. That was in 2008. Most high schools will no longer teach welding. My high school was 1 of 2 in San Diego county still teaching welding. We were taught to gas weld first, to learn to manipulate the puddle. I'm glad it's still being taught that way. It's a truly underrated skill.
Currently welding as a junior in highschool🤘🤘🤘
im welding in sophmore year
WOW, This brings back some very fond memories. I started working at the local Texaco after school when I was 13. The owner broke 2 fingers and a traveling family broke their muffler so he allowed me to weld it back together after that he had me do most of the welding. I grew up on a Ranch/Farm and had to learn real quick how to weld...or at least get it together strong enough to get it back to the shop for a proper repair. The ONLY welding equipment we had to go out to the fields was an Acetylene outfit in the back of the Jeep. The ONLY filler wire I ever used were coat hangers. Everyone back then only used coat hangers. We did a lot of exhaust systems and only used the Acetylene outfit in those days. You brought back a lot of great times and I could almost smell the weld just by watching you. Thanks and keep up the old ways videos for us old timers sake...
My grandpa had a torch, my dad grew up using it, then inherited it. Then he showed me how to use it and in turn I needed it to keep my first and subsequent cars together. Love the videos, thank you and your helpers for putting all the work in to put them together.
For someone who does field maintenance of commercial refrigeration, I always have a O/A torch with me. I taught myself how to O/A weld and it has served me well. I can make a quick bracket anytime I need one. Of course, on anything bigger I use the mig or stick machines we have because of efficient use of time, but being able to O/A weld is a handy skill.
VTdarkangel
You work for Virginia tech?
Man, this was a step back to my freshman year in HS; 1991. Gas welding was Step 1 in welding. Well, oxy/fuel cutting was first to learn your flames and get used to holding a torch. Then came running bare puddles on a coupon, then no filler joints, then bare puddles with filler, then joints. Man.....in the dead of summer and having welding 2nd period meant you were a dirty hot mess for the rest of the day at school!! LOL. My Jr year I had welding 1st period and chemistry 2nd period. I was a complete mess by lunch time!! LOL
Thanks Bob!!!!
1991 ??? I remember in High School in 1974 the shop teacher torch welding a complete trailer and sand rail with roll cage and a trestle frame, corsair engines were the hot setup, not LS1 engines but that was way before your time. I had a job welding small parts for a little company, 50 cents a part and all I could weld. I was just a dumb kid and could have made a ton of money but like most kids I did enough to pay for my car and gas, a few dates. Always smarted when I would run a torch across my fingers with no gloves on. Usually left a dead mess of mushy skin almost down to the joint. Those were good times :)
I'm taking welding now at vocational school. First we learned how to use the oxy acet torches and I sat and cut metal all class, once I got the hang of it, then we go to the tables and learned puddle recognition on a coupon, making a nice puddle, then move on to making a bead on a coupon with filler metal, once that was good, I moved on to butt joints, now I'm on lap joints and once I pass it, I go to T Joints, and once I pass that I finally get to go to stick welding (swaw).
Great video . My welding shop teacher 40 plus years ago started us out on gas welding as freshman. To teach us how to read the puddle and feed wire really helped when we started tig welding.
I remember watching my father oxy welding with coat hanger. That’s all he ever used. Never saw any of his welds fail. This video brings back a lot of fond memories. Thanks.
Charles Builds Crap Coat hangers today aren’t made like they use to be. lol
Coat hangers today aren’t made like they use to be. lol
I tried welding with a wooden one. Didn’t work out too well.
Mel Gross 😂
Same here, my dad was an old WWII Navy welder... 90% of his stuff was OA, progressed to stick with a Lincoln Buzz Box... I remember his Acetylene was generated with a large tank with water in the bottom and carbide rocks dropping in to create the gas... what memories
When I was an apprentice I was taught gas welding by a pipe fitter, an artist. Cooling curves uniformed and weld width perfect. I was honoured to be taught by a true crafts man. That skill as lived with me since being a boy. Thank you Les , a true crafts man.
I learned at the age of 12 with wire hangers , on car sheet metal. Cutting from scrap parts to make rust repair patches , The autobody paint supplies stores in My Birthplace, Sale all kind of oxy-acetylene accessories, gases and sheet metal, mostly 24 ga, because was easy to bend and form. Many other preferred Brazing, But sometimes in Body Works some Fluxes, produce futures problems with the repair. Nice Video! Good teaching. Am 64 now Thanks.
Bob Moffet is the GOAT. Those welds are worlds ahead of just about every video on this subject on youtube.
Out of all processes i tried in school this is my favorite and my eyes favorite, just love to see it
I mig and stick welded for 30 years, but developed heart trouble, cured by having an implanted cardiovertor defribrillator. These are very susceptible to electrical interference, so no more electric welding! So now I'm gas welding, I've mastered silver solder and sifbronze, (building a motorbike frame). Now I'm having a go at welding steel, and these tutorials are so good, I learn more in 10 minutes from one of them than all the books I've read.
Great instruction. Thank you. I learned this 20 years ago in welding class but have never done any gas welding outside of class. Thanks for the great refresher. I love your teaching style. Have a great week.
Thanks for these videos Bob, just picked up my first welding set, oxy/propane as Acetylene is difficult to source in New Zealand. As an IT guy I’m finding engineering really therapeutic, it’s real …
And people complain that TIG welding is slow.
This is the second process that I learned after SMAW. I wanted the knowledge before I learned MIG and TIG. If you have the time, it’s worth learning.
Slow fusion has its advantages. It's just that most MIG welders are lazy.
Bob, is there any difference in weld strength between adding filler or just melting the existing plate?
Adding filler Will Make the weld stronger, fusion welding will leave some under cut and the plates will thin out near the weld,
In the real world as long the joint is designed properly a good fusion will do just fine
Ie. The point of filler is to make sure the weld is not the weak point on a part
Thanks again Mr. Mofatt. I as well was instructed first in oxy/acc in the Air Force. It seems to be therapeutic to grab the torches and weld up some beautiful beads still today. I do also still use cleaned coat hangers when I am without rods. Glad I am not the only one to do this if I have to. Carry on sir, I learn so much from your videos. Thanks
I put many exhaust systems on gas welding! And yes I have used many coat hangers and bailing wire.
Look up Scotty's Muffler shop roll bars and race car chassis. Quite interesting
Just got an oxy acetylene system or kit whatever you call it. And I was wondering where to get or buy filler wire. I thought about using any steel wire but didn't know that was a thing. So it works good?
@@SamSamuylik Works FAIR. Remember the actual welding wire has stuff in it to promote welding: Deoxidizers, more silicon I think. Baling wire and coat hangers work but they're just plain steel. Steel welding rod is really cheap!
That's exactly what I was taught back in high school in the 1970s. Eventually we learned stick welding too, but I have used gas welding and brazing many times over the years. I just recently picked up my first TIG welder and am learning, but as you mentioned, it's a lot like gas welding but much quicker. Having trouble feeding wire quick enough. :)
Just lower the amperage with the foot pedal... Actually if setup similarly Tig and oxy/actylene welding are about th Le same speed... mig now that's much faster
I've been watching to try out oxy acetylene welding. I have a deep brain stimulator to aid treatments of Parkinsons disease and I can't be around arc welding. The videos I've watched so far have really been educational. Thank you for putting these out.
I don't understand why this was filmed without any filter. We can't see the puddle or anything, just the flame and lots of glare. I really enjoy gas welding and it would be great if others could see more clearly what's happening in the joint.
In some ways it's not taught anymore. Anyway . Off this subject . It's a cool video 😎👍
Googles use goggles lol . I'm back to music and stuff
he implies his camera person stepped away, so yeah, they missed that chance.
Lanny Fuller J It’s still taught just not really uses as much.
@@documentationslave397 OA welding is very cool, and still has excellent application in welding 4130 tubing for aircraft fuselage work. It's awesome stuff. I get a kick out of people who say "I'd *never* trust my life to an aircraft that was welded with anything other than TIG." LOL...if they only knew about the millions of hours flown by aircraft using OA-welded fuselage, empennage, landing gear and engine mounts. No TIG welding in the 1920-1940s, boys and girls. Sure, the Heli-Arc process was perfected about that time, but it was so expensive that all the smaller General Aviation aircraft were welded with a good old OA torch for many many years.
When I was in airplane mechanic school in the early/mid 1980s, our instructors were old ex-military types for the most part--several from the WWII era, when they were young men. They used OA welding in the field. A lot. It's pretty much all they had, and all the work on gear and engine mounts was done by gas welding. They didn't have anything else on an island in the Pacific...or an aircraft carrier bobbing around out there. There certainly weren't any TIG machines on those Navy ships--yet there were still damaged aircraft to repair.
OA welding is a GREAT process, and the true artisans can weld aluminum and stainless with it. I can't, but I can weld the hell out of 4130 tubing using an OA torch set. And it's pretty fun to boot...
Excellent follow up to last year's video. You don't imagine how helpful it is for anyone interested in welding to see how welding techniques transition from welding light guage metal with oxy-act and TIG to welding heavier gauge with stick and MIG. One can self-teach welding, but it does not replace the quality of instruction one gets from a trade school. Thanks for the series.
There is a lot to be said for old school. If you get your flame too close with oxy/acy you don't have to stop and regrind it.
Do the gas pipe installers still use oxy/acy to "live" weld gas pipes?
Is there any reason not to use tig filler wire with oxy/acy?
I love the quality and range of topics you cover in the videos. Keep up the great work!
Started with gas welding in high school. Teacher said it was best to learn gas before learning electric. You get to learn puddle control alot better because it's slow and you dont need as dark of a lense.
Brings back old memories !!!
OLD John Deere combines 55R, 95R, 105R's that we used on the farm were held together with brazed coat hanger wire and can flux ! Parts, sheet metal wore out , and it was faster, and cheaper to cut out a piece of metal out of an old junked combine than run to the parts/implement store that usually didn't have it in stock !!
Old school is awesome! Just like my engineering, got start with the old tech to appreciate the new tech. Thank you!
We still use BOA (bottled oxygen acetylene) welding on the gas line. Residential mainly. Stick welding for the larger pipe and/or if a hole gets popped into the pipe somewhere.
And yes, we DO welding on the pipe when the gas (natural gas) is in the pipe and flowing.
Great video.
You should get some video of that. Do you repair leaks this way? I saw the aftermath of an explosion near Kings mtn NC buryed gas pipe blew all the soil off it across a friends pastures. Scarry stuff.
As I watched this video again, I actually saw that you did a nice clean job without the filler rod. Gonna tinker with that some. I like the finish look actually better. Thanks Bob
I enjoyed welding, shop class in general in high school. Liked my instructors (mostly) but just watching these videos we were taught all wrong. We were taught to cut and weld with an oxidizing flame. Used the same filler wire for everything. Never told to clean mill scale. I'll bet the tig machine was set up all wrong. The tip was always balled, never told to sharpen it. I'm amazed my welds looked as good as they did, and tested (stretched) as good as they did.
Omg, I just realized the reason I couldn't braze for crap. We were trying to get it to stick to mill scale
I tig,mig, and stick but still use a torch (dillon henrob) for fun on aluminum and steel, works good
ER70 wire makes for a weld that is a lot harder than the surrounding metal. I find that baling wire makes for a weld that matches the base metal on mild tubing like exhaust pipes a lot closer.
I’m learning this in my welding 1 class. Learning by watching your techniques and angles. Thanks!
You are my "go to" source for instruction on all methods of welding/brazing. Thank you!
Great stuff! I'm a hobbyist welder and fully agree that these skills will transfer to TIG. I've welded a bunch of stuff around the house and fillet brazed and built two bicycle frames too. Being self taught was a long slow process, especially the brazing. You made me laugh when you were talking about popping! Had that happen so many times when I was beginning!
A very good, older friend of mine, hotrodder from the 60’s taught me how to rebuild engines and weld. We started with Oxy-Acetylene. I bought a set from a mechanic who passed away. His garage had flat head engines...he did his work in the 40,s. Through all those years, replacing non-brass components of course, my set continues on. Yes, a little slower than electric, but ...100% duty cycle. I welded a quarter inch thick scraper blade on my small tractor snow blower. Started with my Sears MIG...inches at a time...rest. Pulled out the gas torch and finished the entire 48 inches without stopping, even re-did my MIG welds to pretty them up. I know...there are just some things you can’t do well with a torch, so I do have a new, better than Sears MIG, Stick, TIG machine. But in a post apocalyptic world with zombies taking over I am holding on to my torch and tank set for the survival camp! 😀. Have a Blessed holiday season and thanks for the videos I have been enjoying and continuing to learn through all of them.
I grew up welding this way, and taught my sons this method. Best way to learn puddle control and patience...
Great video. I'm learning oxy acetylene welding right now in my welding class at my local college and I'm loving it. Getting the flame just right is what I'm trying to master as mine seems to be too cold at times. This video helps and I hope I'm able to master the technic.
I use oxy-acetylene everyday to braze in diamond cutters for oil field drill bits. We use higher number tips but still very similar to welding. Your videos are always informative, keep up the good work. We also use the mini torch bodies, they are easier to handle for brazing and welding.
How long do those little bottles seem to last you?
30 years ago this year.....this was the 1st welding I learned, freshman year of high school.
That is what I started welding with back in the early 60's when I was a 16 year old. My Dad had a auto repair shop so I had access to Oxy-Acetylene... I still remember my first project I took gas tank filler necks and welded them into my exhaust pipes for dump tubes on my hot rod Ford and I used coat hanger wire! But I am old and beat up now but I miss doing that ...
I learned to O/A weld in 1970. I was self taught for the most part. My first torch was a Craftsman, and included was the best book I have seen on O/A; "The Oxy-Acetylene Weldor's Handbook" by T.B. Jefferson. I wore out my original copy and bought a second from a used book dealer.
Cope1024 Right on,,me too, cept not a sears kit.
It would be nice to see some etching and bend tests on some gas welds, just to compare to modern techniques.
I started out learning gas welding at my highschool but I haven't done it since back then (late 80's). I recently acquired a couple of old gas welding and cutting kits from AGA and Elga and I plan to take up gas welding and cutting again as soon as I have checked that all the parts are in good order. Thanks for another great video.
I learned to weld OA from my auto shop teacher in high school. He said it was good to learn it first before other kinds of processes. This was a good video but the camera could have benefited from a #5 or #6 filter to show the puddle and torch like you have done on so many other videos.
Id like to see you guys add the welding filter a few times during shooting these videos just to see the puddle and what not. Cool stuff!
i worked in a muffler shop for a few years, in those days all exhaust pipes were mild steel, there were no corrosion resistant alloys back then so all exhaust systems had surface rust. most customers with a rusted-out muffler didn't want to buy new exhaust pipes so we would gas weld a new muffler to the old pipes when the pipes were too soft to clamp on. we had proper filler wire but if a pipe was very rusty and soft the best filler was coat hanger wire, normal filler wire had a tendency to burn through or not puddle.
Thank you, this is my go process now that I'm fitted with a defibrillator. Have sold most of my arc welding equipment with the hope that someone creates a Faraday jacket. In the meantime I'm not taking any chances, going to stay warm welding in the winter and a bit warmer in the summer. Enjoyed the video!
Thanks Bob, been teachin myself this year and i saw a few things i should be doing differently.
I would love to see the set up for a T-weld on an inside corner with a lens on the camera to see how the pool is controlled to get a weld that looks nice.
Also the use of flux. Thanks again.
Watched an old english guy gas weld an aluminum coke can back together when I was 20yrs old in '74. Led to a 40yr welding career
Pop cans were steel in '74.
I would love to see more torch videos. It is something I need more knowledge in. Actual comprehensive videos WHERE YOU CAN SEE are hard to come by. Thanks Mr. Moffatt, another good one for the banks.
Gas welding is so versatile, however slow it may be. I love it
One of the cheapest routes to get into it too
Thanks. I have welded with coat hanger before, didn't turn out well. My wife's coat was still on the hanger!
Where is Paul???
I learned to do OA welding on automobile exhaust systems. We used wire coat hangars for filler metal.
Sir,
You have taught me so much.
Thank you for making these videos
اهعف۶
I read in a very old book about welding, that once portable welding equipment was invented and people started welding out in the field, that "no man's fence was safe"! I have tried coat hangers and baling wire, noticed a lot of little sparks and fuss, I think actual welding rods have deoxidizers in them that steel wire does not. It still works! I have definitely noticed the decline of the wire coat-hanger, which when I was a kid was like the foundation of technology, we used them for everything! I hoard some now, but they used to be free and abundant.
Great vid. Bob. Good comments below too. I realized why I couldn't get a bead down (very new to gas)..Not clean enough and had my flame oxidizing-too hot. Just blowing filler away. Now I want to go out and try again. i also realized how spoiled I am using mig. Ha ha
Another great video Bob, you are the best. This is a process that no one seems to teach anymore and I think it's a mistake. If I only had a few bucks available and wanted something that could do just about everything, I'd get an oxy/act set up for my garage. You can cut and weld most anything. Yes it's slow (but that's actually a good thing) and it puts a lot of heat into the metal but it really allows you to see the weld puddle and how to manipulate it which is what you want to learn with any of the other processes. Gas welding is a great way (as you said) to help become a good TIG welder.
Badass man. This is something I'm gonna practice at the shop in my freetime.
Another excellent video Bob! OA welding is a skill that is often forgotten; but is another option [tool in the toolbox] that can be preferential in some situations. The amount of heat seems to be key, with the "sparkler" condition indicating too much heat locally. A cut & etch test would also be very interesting on your welds (which look very good btw). Thanks again!
we always gas weld in the pits! I love it and hope that more
people learn this
Having no choice since I had my defibrillator put in I just ordered everything I need for oxyacetylene welding with a Smith AW1 and light weight hoses . Just doing thin sheet steel for body work on an automotive restoration project it will come in handy to replace some of the lead work too. Three year old video but the technology will never change , that works for me. 🤙🏼
As to Oxy/Act welding. My buddy does it for pipe fittings for natural gas to homes. Wether a T or union or riser that’s his bag. He is getting his certs for Arc in the same job. Just whatever the gas company specs for the job is the process needed. So still a valuable skill that gas welding. Never have have too many skills that can make you money
You nailed it Bob, just like old times. Used to weld this way for miles.
Great method. Here in sweden its used alot for central heating pipes laying under ground.
Didn't see it mentioned, experimental aircraft frames are frequently 'gas' welded. Gas welding has a long history in light aircraft production. As recently? as 25-30 years ago I have seen welders doing natural gas hook-ups in the suburbs.
Oh I have some old wire coat hangers too, I sometimes use them as TIG rods when I run out and absolutely have to weld something, or when I'm fucking around and low on my cheap rods. Ain't wasting the nice stuff on art.
My pop was an artist with gas torch. So this all brings back memories. He would cut cars in half and build buggys, el camino style trucks. Silly stuff. I didn't realize how much fun he was having. I think I am going to buy a nice gas set and start welding shit..........stuff together. Cool video
Bob, old school rule of thumb for tip sizes was for every 1/16'' thickness is tip size, #2 tip for 1/8'' material, #3 for 3/16'' material. Also, fowl the tip as you did tacking up messes up the flames cone sharpness. I was taught old school using the side of the flame to melt the steel with . Older Scooter Root hands at Shell Deerpark Ref that gas welded everything 2'' and under. Slick wasn't the word. Machined smooth is more like it. Inside and out all the way to ANSI B31.3 in the early 70's. That was the first time i witnessed walking the tip on a 2'' pipe. That bend in the tip has a welding purpose, imagine that?
Thank you for doing 2 parts so we can see the difference and learn from
Just about to go to school and learn this today! Thanks for the run down.
When I first started to learn how to weld it was oxy-act. with filler wire [coat hangers] and they worked great on sheet metal up to 1/4 inch plate. Thank you for for still teaching it. Is becoming a lost practice I believe.
When I went to Tech college in the late 70's. They started us out using this technic. Said it was good for hand eye coordination. I went on to weld for over 40 years. Every process, too many certifications to remember. I love watching the old school stuff. Every beginning weldor needs to learn this process. You notice i said weldor. A welder is a machine. Joke of the day. LOL
Here I am still having trouble tacking with a stick rod 😂
The puddle is important but so is the heat near the puddle, the timing the torch control, I learned a few things while observing that, thanks
"All about the Old School'" I like it, like it a lot !!!
Excellent vid. Learned something new today: Welding with no filler wire. How cool.
Bob, another great video, thanks! On your next oxy video, can you also include a camera shot through a shaded lenns? It's difficult to see detail without it. Thanks!
I'm qualified in 5 processes, and AFW is one of them. I was certifying for a 4B open root weld, and was doing some 2 inch pipe when I finished my degree. Def fun stuff, but very few people can weld with Oxy-Acetylene without starting a fire, haha. And they always burn their hands, so the welds come out looking jagged, haha.
Yup, that's how I learned to weld at college in '96, needed some 2mm plate but only had 1mm, clamped 2 pieces together and chased the puddle all the way around the edge to get what I needed. Have seen people using re-bar tying wire for filler, plenty about on construction sites apparently.
The first weld I ever made was gas. This brings back memories.
You’re awesome bob. Good video. I do think you can take better video of the puddle, so you can see the cone from the torch and the melted metal. You miss the small movements that manipulate the puddle.
Really great video. I love the O/A welding vids you do. I love the tig welding the most but I also still love to do the O/A welding whenever I have time. It's slow but it's really enjoyable to do. If I lose power for some reason, I know I can still weld something. I have built a few recumbent bicycles from junk bikes I pick up in people's trash at the road. I mostly tig them now, but when I first started, I O/A welded them together. And none of them have ever broken. I like to use it also when I'm welding on emt conduit tubing when the tig just makes a mess with all the plating on the metal. Thanks for this video. Dan
I don't suppose next time you do a video on gas welding you could put a filter on the camera so we could actually see the puddle.
They probably don't have an appropriate one for their camera
You should show everyone how it should be done.. instead of actually taking the time to complain.
@@McClellan71 it’s a valid criticism
@@McClellan71 I don't have a filter either, so my video would look about like his, though plenty of times in the past they have shot videos with filters so why should this one have been any different.
I am 76 years old tinkering with oxy acetylene in my garage. Can't go with electric welding because I have a pacemaker. I enjoy watching your videos. Very helpful to me.
I would love to make so art stuff though. Where do I begin?
Bailing wire is working fine for me so far.
Yah😊 I been through a lot of coat hanger.... But it's been a while getting spoiled with fancy welders these days but this video makes me what to drag out the old tanks😀
i don't know if you review the comments from these older videos but i would sure like to see you weld aluminum with an OA torch. my dead uncle used to work in a tank factory in KC and he told me in the 50's they welded aluminum tanks with OA-i sure would like to know how they did it
I did it in the '60s with flux covered rods. It was quite easy to do. Low temperature. Low drama. One nutty thing was that aluminum conducts heat rather quickly. You need to get in and get out without getting famous. I did 1/4" material. I hadn't done any aluminum sheets. That might be better off brazed. I see them brazing aluminum body panels and they call it welding, but I don't think they are melting the parent metal, which is the difference between the two. I haven't kept up with the new techniques, but Muggy seems to have a really good looking system. I remember that being a braze. There are others also.
I think this is a lot more fun on light gauge sheet! On thicker metal as we see here, you start to long for that electric arc. I suppose there are bigger and bigger tips, but I haven't gone there. Looking at old books about welding, you can see very heavy work being done by torches, especially back when they had Acetylene generators, I guess you could use as much Acetylene as you wanted!
I’m no welder .. are oxy welds as strong as stick or mig welds?
Thanks
It depends on the application, but all things considered, they can achieve parity in flat-out weld strength.
Eg: there are some automotive specs that call for O/A over arc, & vice versa, and there are some aerospce codes that do the same.
Thanks for the tip size and pressures. Those helped me a bunch.
Please make video on how to form a metal pool and rod dipping in pool
Hi Mr Moffat I know this vid is over a year old , But I would like to pass on something I was taught by My awesome instructors . When setting up adjust your Acetylene regulator to 2 lbs open your torch knob at least a good 1/2 turn , light it and balance your flame by adjusting till you just lose the soot with the regulator, now with it still lit open the Oxygen the same at least 1/2 turn on the torch and adjust the Oxygen regulator till you get your neural flame , Dual stage regulators will old these setting so no matter how you turn on your torch your always be lighting at or very close to a neutral flame , Its a lot faster with less fiddling , We used to also use the same technique for lead burning /Welding on roofing , but you want the tinniest whiff of a carburizing flame for that (Works better as Lead oxidizes fast). You should try lead Welding its fun very fast paced and extremely frustrating at times , Just scrape the edges clean on the sheet lead and cut you a strip off what your welding as filler, clean it well ( then it is a true autogenous weld).
Seems like a lot of heat put into the material - does this have an effect ? (welding newbie question).
OF COURSE it does! An unfortunate side effect of almost all welding and related processes I imagine. People say "Heat-Affected Zone", but I don't know of any cases where anything is IMPROVED by this! This is the technical reason behind the constant urge to do the least welding possible, finding the least heat input to make the weld. Sometimes this involves higher power and faster travel, which is a little surprising. WeldingTipsandTricks has some nice videos just about this.
@@leonardpearlman4017 On aircraft Chromoly 4130 when welding fuselages O/A was always used, when a piper brought back the Super Cub in the 70s they used TIG process and they found that the TIG fuselages were cracking by the beads, the heat zone was far too concentrated, The O/A "equalizes" the metal around it like a temper, aircraft are under different stresses though
Yea it does, one of the reasons it isnt utilized as much. Than and efficiency but as the man above me has mentioned it is still used in some industries
I know I’ve said it before but damn I love watching you weld! You give great info and explain it in an easy to understand no BS way and while I enjoyed Mr Tig’s video’s that name really didn’t do him any favors although I’m sure someone else gave it to him. (Surely he’s not that arrogant). I’m glad it’s your show now keep giving us great videos.
If you TIG weld and just do occasional gas, your ER70S-2 TIG rod makes a fine gas filler rod. I've used it a lot and it makes good, sound welds. The extra deoxidizers help if your flame happens to drift very slightly to the oxidizing side. To be honest, I've never made a test coupon using ER70S-2 with OA, so maybe it's time to do so?
Hey BOB! There's an idea! Test coupons using ER70S-2 and maybe even ER80S-D2 filler rods with gas welding. I bet they pass the bend test with no problems.
Very edifying .Thanks for sharing your skills and knowledge.
Damnit bob that's a nice gas weld on your thumbnail
I'd like to see something about propane/oxygen. Acetylene is getting expensive and I always seem to have plenty of LPG around in 20# cylinders. I wouldn't do enough torch welding to make it worthwhile to maintain a bottle of acetylene. One of the scrap yards I visit uses propane/Oxygen to cut metal so it must be a cheaper alternative and it's clearly able to melt metal.
rfcarlson1 I've welded with oxy propane and it's a pain in the ass. Propane is ok for cutting because it's just for preheating the metal, the oxygen is actually cutting it.
Some reasons why propane is bad for welding steel:
Propane flames carry a large amount of water that reacts with steel.
Propane requires a higher ratio of oxygen to fuel to make a neutral flame.
there is no feather in the oxy propane flame to clearly define where neutral is.
The flame is cooler in temperature than acetylene, and the majority of the heat is in the outside of the flame not the candle.
And some reasons why acetylene is particularly good for welding:
Higher temperature flame.
The majority of heat is concentrated in the inner flame cone.
Acetylene releases an abundance of co2 in the outer flame which acts as a shielding gas.
Neutral flame is easy to find by adjusting the feather.
I use oxy propane for heating glass so naturally since I had the equipment I gave welding steel a try. When i tried Using a neutral flame it resulted in extreme porosity, the excess water in the flame as well as the lack of excess co2 was the culprit I believe. I was able to minimize the porosity by using a highly oxygenated flame to the point where I was essentially cutting the metal and feeding tons of filler wire to refill the hole.
I was able to make a rack to store my glass under my work bench and it's sturdy enough. The welds were not pretty to say the least. Before I started severely reducing the propane to oxygen ratio the welds were so porous with no penetration I could easily break them by hand. after adjusting my technique I was able to stand on the rack without any welds breaking.
So while it is possible to put things together with oxy propane, imo it would be essentially impossible to make a good looking weld with full penetration and no porosity. I bought an acetylene tank since then and the difference is night and day.
Long reply, I felt compelled to write out all this because I thought the same thing and tried it for myself despite everyone online saying it's not possible. In my research i couldnt find any first hand accounts of people trying it.
Lastly i have read that oxy propane is ok for welding aluminum when using a proper flux. I haven't tried that yet. Check out tin man technology they have lots of info and products relating to oxy fuel welding.
Like Brett Smith said, it doesn't work for welding. Wrong flame chemistry. I explained this in another thread, and I will paste it below:
"Oxy-acetylene combustion is a two-stage process. The first stage occurs in the inner cone, where acetylene's triple bond breaks, releasing quite a bit of energy (which is why it's hotter than any other common fuel gas). Then, each carbon atom combines with a single oxygen atom at the point of the broken triple bond, at which point the hydrogen breaks free from the carbon. This releases even more heat. The result at that point is an outer flame envelope made up of carbon monoxide and hydrogen, both of which are highly reducing gases (they readily combine with any oxygen they can find). They shield the molten metal from the atmosphere. At the outer edges of the outer flame envelope the CO and H2 combine with atmospheric oxygen to become CO2 and H2O.
Propane, by comparison, is a fully saturated linear chain hydrocarbon (known chemically as an alkane, vs acetylene which is an alkyne, and propylene which has a double bond making it an alkene). Alkanes are very stable. Unlike triple bonds, which release energy when they break, the chemical bonds in propane absorb energy in order to break. This explains both the lower flame temperature, the lower flame speed, and the fact that the bulk of the heat is in the secondary flame. Propane's chemical formula is C3H8, 3 carbon atoms surrounded by 8 hydrogen atoms. Before any of the carbon atoms can oxidize, they must have the hydrogens removed, and then broken apart from one another. Because the hydrogen atoms are the first to break away, they are the first to oxidize. They combine with oxygen to make H2O, and the carbons combine with oxygen to make CO, assuming a "neutral" flame, which is a difficult thing to achieve with an alkane fuel gas. Often the flame is run oxygen rich, turning some or all of the carbons into CO2.
In either case, neither CO2 nor H2O are "inert" or stable at the temperature of the flame. They both dissociate and recombine randomly, leaving a certain portion of free oxygen or hydroxyl radicals available, thus they are actually oxidizers at flame temp. The H2O component of the flame can be absorbed into the metal and dissociate, where it not only oxidizes carbon or iron, but leaves hydrogen in solution, with the potential for hydrogen embrittlement depending on the alloy."
It was claimed that MAPP gas could be used to weld back when real MAPP was still being made, but I don't think it would have been a very high quality weld. MAPP stands for MethylAcetylene Propadiene Propane. Just the propane content alone would have made it a poor welding fuel, but both methylacetylene and propadiene also generate quite a bit of H2O in their primary flame. Like propylene and propane today, MAPP was mainly geared toward cutting and heating.
Hope that helps explain why acetylene is the only viable fuel gas for gas welding. If you are only welding thin material, and don't need more than 6CFH of gas, then a B-size acetylene cylinder is readily available and fairly inexpensive to both buy and fill. If you have a standard CGA510 fitting on your regulator you can buy the adapter to go from the B cylinder to your CGA510 regulator. Usually the welding gas suppliers carry them. Material thicker than .090" will need a tip larger than 6CFH, so you will need a bigger acetylene cylinder. You cannot continuously draw more than 1/7th the cylinders rated contents per hour, so if you want or need to weld thicker material, determine what size tip you need to use and how much CFH of acetylene it requires, and get a tank with a capacity of 7 or more times that figure, if available. Or, like the rest of us, stick to arc welding the thicker stuff :)
Brett Smith thanks for that. Always wondered how OA welding doesn’t get porosity
I love this guys vibe…