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PostPosted: November 9, 2023, 11:57 pm 
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Joined: June 28, 2016, 9:21 pm
Posts: 42
I saw in a video that a British kit car company uses brazing to join steel tubings for the chasiss.

Some uses brazing to build custom motorcycle chasiss

What are the advantages of brazing?

For DIYers, is brazing an easier process than welding? Is it easier to control than welding? Is it more suited for begineers who is intimidated to weld?

Does brazing produce better strength joints than weldings?


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PostPosted: November 10, 2023, 9:04 am 
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Joined: September 22, 2005, 8:12 am
Posts: 1880
Location: 4AGE in S.E. Michigan
It is called nickel-bronze welding. It has a T/S of 80,000 PSI, Vs your typical 50,000 PSI for a MIG weld. Just the nickel-bronze rod to build a frame will cost between $8oo to $900. Then you need the equipment to feed in the flux into the welding hose plus the oxy-acetylene equipment.
It's not locost $$$ :ack:
The main advantage is you do not have the heat effected zone with carbon embrittlement because of the lower temp, along with equal or better strength.
You can easily pick up sufficient MIG welding skills in just an hour or two of practice. Check out your local junior college for classes or on-line instruction!,


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PostPosted: November 10, 2023, 11:23 am 
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Joined: October 24, 2008, 2:13 pm
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Location: Carlsbad, California, USA
As Dave points out above, the process is not low cost.

We Americans tend to make fun of the Brits for not doing the Macho thing, which is welding. However, they have employed the bronze welding technique very successfully for years. The proof is in the pudding. They're produced many outstanding and successful race cars using it.

I haven't done any brazing (the American term for using a similar, but not identical method) since high school shop. However, it is easier in many ways compared to welding. Like soldering, brazing "follows the heat" and flows with it. Once you get that down, it's pretty easy to do.

Cheers,

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Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


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PostPosted: November 10, 2023, 11:55 am 
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Joined: April 23, 2006, 8:26 pm
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Location: SoCal
Buried somewhere in one of my old build diaries, is a pic of a brazed motorcycle frame. It appears to be TIG welded, but isn't - it's brazed! The guy who did it is truly an artist.

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Both available from https://www.lulu.com/


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PostPosted: November 10, 2023, 2:16 pm 
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Joined: February 20, 2014, 12:36 pm
Posts: 26
Location: Cntl Coast, CA
Joint fit-up is also more critical in brazing, better for bicycle frames


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PostPosted: November 10, 2023, 9:40 pm 
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Joined: April 23, 2019, 4:30 am
Posts: 399
Location: New Zealand
One of my customers is a local legend, his work is exemplary and he really likes the way the brazed joints transfer loads between tubes, of course 50 years of experience helps....it's fair to say his work has stood the test of time in very demanding conditions.

Attachment:
mcintosh frame.jpg


http://www.manxnorton.co.nz/


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PostPosted: November 11, 2023, 9:49 am 
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Joined: July 7, 2011, 12:17 am
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Location: Oregon City, OR
That's a skill I regret not learning when I wore a younger mans shoes.

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