The strength of brazing

I show that a brazed extension bar is strong enough to take off headbolts.

[@StormbringerMM]

The wife calling you was hilarious 😅

[@TheDadPenfield]

Many people heat too much when they braze and not enough when they weld. As long as it is hot enough to melt my brazing rod that is all I needed. Thank you for commenting and watching.

[@smalltownplaya712]

i wonder why people mig weld oil pump pickups to oil pumps instead of brazing....i would think brazing would be best since it is more malleable & vibration resistant? I consider mig welding very cold & brittle on cast steel....what is your opinion, i think brazing would be the best way to fuse a pot metal pickup to a cast steel pump?

[@micmichaeladflak6373]

That's not entirely true.... the parent metal needs to be heated enough that the braising rod and parent metal bond.. heating the two sources just to the point where the braising rod melts does not create a strong bond between the two metals you instead have only soldered the joint. Steel needs to reach about 1200 degrees where as braising rod already begins to melt at 850 degrees. I flux and heat my joint and then when it begins to turn red I start laying in the rod and it just melts right onto my work and bam your done.

[@MrPaddy1000111]

But the real question is, Are you ready to eat?!

[@ARCSTREAMS]

lol im always ready for that and to drink,,dont forget the drink

[@davidbaker8648]

Superb! Thank you. A really thoroughly done piece. I needed to know how strong brazed steel might be, and you have clearly shown me ..MUCH stronger than I thought or need- I don't need to try to weld now, I'll braze the pieces I have together. Cheers!

[@tomchristopher4576]

Great demonstration. Thank you!

[@CodingToFreedom]

that was very informative!

[@GraphicManInnovations]

thank you for sharing that, very informative

[@jeremysmith9041]

Thank you so much for the information ! Very informative

[@Themadfranklin]

Great demonstration! Taught me good about the strength obtainable through brazing.

[@ryankim3612]

Super informative Mr TheDadPenfield. Thank you very much!

[@steveash9287]

Thank you. I too was surprsed that you didn't need to bring the parent metal up to cherry red. Well done.

[@mateoboschify]

Very cool. Thinking of getting a torch set to try this out. Thanks for the video.

[@buddha65281]

Thank you! have an aftermarket light bar for my HD that needs the mounts extended and I was thinking of brazing on the 2" pieces but was worried it wouldn't hold.. Gives me confidence to try.

[@klowny1969]

Nice work I enjoyed ur video

[@ian-c.01]

That was unexpected, especially considering you barely heated up the parts enough. I was lead to believe the parts to be brazed had to be uniformly red hot to get a successful joint, what you did there was just melt the brazing rod onto the surfaces but it worked fine.

[@rocki_bb]

I know this is super old, but it's likely the paste that made the difference

[@MrStephen777]

Incredible and i was told brass to steel brazing was not very strong.

[@leonda4817]

Wow, impressive demosntration! How do you make sure the braze goes in between? Is it possible to give both ends a very thin braze, then join them and heat them together? Or would that be unnecessary? I assume that the thinner the braze between the parts, the better the shear-resistance.

[@TheDadPenfield]

Leon Da. The melted brazing material goes in between the metals by capillary action. It is pulled into the joint. The thinner the braze, the stronger the union. If you brazed each part first, the properties of the melted brass would change and you would not get a good bond. You can put slivers of brazing material between the two metals and then heat, but you run the risk of heating and melting the brazing material before heating the parent metal and not getting a good bond.

[@leonda4817]

@@TheDadPenfield Thank you very much for the torough explanation!

[@astbrnrd]

Where did you get the rods? And what kind are they?? Asides from the cosmetics, nothing else matters....it worked better than advertised ;-) Respond when you can make some time plz. Cool video.

[@legalpundit22]

Nice information ...but could you explain... if a broken Bottom of a vintage roadster bicycle was found with a brazed weld. How strong would be the weld, compared to its original make ? Thank you in advance, for a satisfactory early reply !

[@TheDadPenfield]

Bike frames are brazed because the metal is thin and brazing uses less heat so you dont have to worry about warping the tubing. TIG welding is also used and both have similar strength. If done properly the strength of a repaired brazed bike should be equal to the original because the original was probably brazed.

[@legalpundit22]

@@TheDadPenfield... Thank you for the timely clarification, I am peddling back home on the said bicycle, albeit with a renewed confidence ! :)

[@justingeraldi2304]

Nice video,,but with an extension that long probably only half the torque is reaching the socket,,,but still impressively strong

[@TheDadPenfield]

Justin Geraldi I did have a braze on both ends. I am still using that extension.

[@TheDadPenfield]

I ordered the mild steel bar many years ago for a project that I never finished and I can't remember where I ordered it. But I now order from onlinemetals.com because you can order almost anything including these bars and there is no minimum order requirement. That is important if you only work with metal for fun and not as a profession.

[@davidfarmer2049]

haha "ready??" "Noooo......"

[@davidfarmer2049]

Ok you ve convinced me.....

[@timothynicholson8231]

Thank you for the info!

[@ARCSTREAMS]

does copper wire brazing make a stronger joint than silver wire brazing?

[@TheDadPenfield]

ARCSTREAMS Silver brazing rods have mostly copper in them. Brass or bronze rods have mostly copper and some zinc and phosphorus instead of silver. I assume your question is “does a bronze brazing rod make a stronger joint than silver brazing rod”? The answer to that question is yes. Silver lowers the temperature that the rod melts as well as increasing the cost. Sometimes lower melting point is needed like when you layer brazes in art projects or if you brazing low melting metals like copper pipe. I do not think there are pure copper or pure silver brazing rods.

[@ARCSTREAMS]

yes sorry i should have considered the composition of each rod,,but from looking at the melting points of the metals i will assume that higher melting points means a stronger joint(unless my theory is wrong),i found that brass has a lower melt point than bronze ,bronze has lower melt point than pure silver and pure silver has a lower melt point than pure copper ,so if we compared a high percentage silver brazing rod to a pure copper brazing rod i would say the copper is stronger

[@fredasiong]

What brazing rod did you use and gas type?

[@TheDadPenfield]

fredasiong I used oxygen at 5 and acetylene at 4 with a 00 Harris tip. Neutral flame. The rod was a bare brass rod (no flux on the rod, though I added flux to the rod and metal). I think the brand was Forney.

[@SuperCrackHead1234]

You ready to eat

[@johnpalma7265]

You shonough hast made a believer outa me, Ya'll comes back now yah hears?

[@islandpowersports4289]

Great job and vid! Gotta say that taking those head bolts out with your torc wrench is a terrible thing to do to the wrench. Now go eat.

[@TheDadPenfield]

Thank you for the comment. I agree I should have replaced the torque wrench with a cheater bar. While editing, I left my wife's comment in on purpose hoping someone would enjoy it.

[@bobjones37450]

Great video. Brazing is a dying thing anymore. It should not be though. Also please stop using your torque wrench to take bolt out with like that. That's a really good way to ruin your wrench or at least mess up its accuracy.

[@TheDadPenfield]

Thank you for your comment. I learned brazing because I started off welding with only a torch but I was limited in what I could join together. With brazing I can join almost anything together. I did make a mistake by using that torque wrench to remove those bolts. Being in front of the camera must have made me reckless.

[@bobjones37450]

TheDadPenfield I have been welding for years now and I can braze but I'm not very good at it. I've been working on my skills here lately when I have time in the shop. We have all been guilty of the torque wrench thing. I know first hand it's not good for them. Lol