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Thread: What Material for Roll Cage/Chassis brazing?

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Old 03-27-2021, 11:03 PM   #1
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Default What Material for Roll Cage/Chassis brazing?

Whats a good material for brazing a roll cage/chassis?

Im using a propane torch and Saftey Silv 56.

3/16 break line would seem to too flimsy and bendy for an entire chassis.

Thanks
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Old 03-28-2021, 06:33 PM   #2
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Default Re: What Material for Roll Cage/Chassis brazing?

i use all kinds of stuff barbaque grills metal racks shoping carts or what ever i have laying around breakline is fun cause it dose show trail damage its actualy vary nice to work with and holds up well

the trick is to use a combo of solid rod were you realy need the strangth and light waight tubing were you dont and are ok with minor bending

Last edited by ferp420; 03-28-2021 at 06:35 PM.
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Old 03-28-2021, 07:18 PM   #3
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Default Re: What Material for Roll Cage/Chassis brazing?

The pros will use stainless steel tubing and safety silver solder. I used 3/16" brake line tig welded together for my rear cage. It has taken some hard hits with no damage other then paint.



Cage is off getting a fresh coat of paint to go with the new cab. My rig is 9 lbs and has tumbled really hard a bunch of times in the year and a half the cage has been on it. If you brace it right you can use whatever you're comfortable using. CODYBOY has allot of good tubing info on his threads. The guy knows his stuff. Good luck! Look forward to seeing something come together for you! Have a great day!
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Old 03-28-2021, 09:03 PM   #4
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Default Re: What Material for Roll Cage/Chassis brazing?

I've used both solid rod and 3/16" brake line, using silver solder and flux. I would recommend using Mapp since it's a little hotter flame. I have also Tigged using silicon bronze rod with some good success.
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Old 03-29-2021, 08:49 AM   #5
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Default Re: What Material for Roll Cage/Chassis brazing?

Stainless brake line is popular because it is tougher than mild steel, nickel and chromium makes it that way. Galvy brake line needs to be stripped off if I recall correctly to braze. 3/16” rod is strong, but obviously heavier. I have used 3/16” steel rod, 1/4” aluminum rod, 1/4” dom tube .040 ish thick. But my favorite is 1/4” hr steel, .060” wall. I’ve only used tig and mig processes. Bends nicely, welds nicely, and you can put m3.5 or #4 hardware through it snugly.
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Old 03-29-2021, 11:26 AM   #6
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Default Re: What Material for Roll Cage/Chassis brazing?

Thanks for the tips,

I've looked at Mapp bottles, but they've went out of producing in the US a long time ago, only thing left now is Map-pro gas, which burns in a temp just barely above propane.

Do you think 3/16 oil-hardened drill rod will work? It's a little more expensive than standard steel rod, but is a little stronger
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Old 03-29-2021, 01:06 PM   #7
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Default Re: What Material for Roll Cage/Chassis brazing?

That would be a big no! You won't be able to bend the drill rod without it breaking. Go to Lowes or Home Depot and get some 3/16" rod at $4 and change a 4 foot stick. Depending on what you are building, you can build an entire tube chassis triangulated properly for high speed abuse, with 3 sticks.

35 mph here, ran out of talent. 3/16" rod, still straight and true.

20161112_151117_15682 by MAC FAB, on Flickr

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Old 03-29-2021, 01:43 PM   #8
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Default Re: What Material for Roll Cage/Chassis brazing?

Can someone share a website source of the silver solder? I've heard about this type of solder before but still don't quite fully understand its application, or where to buy it. I have experience soldering 60/40, but that is for electrical connections and melt at lower temperature.

Last edited by usert_l; 03-29-2021 at 01:46 PM.
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Old 03-29-2021, 05:27 PM   #9
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Default Re: What Material for Roll Cage/Chassis brazing?

Quote:
Originally Posted by usert_l View Post
Can someone share a website source of the silver solder? I've heard about this type of solder before but still don't quite fully understand its application, or where to buy it. I have experience soldering 60/40, but that is for electrical connections and melt at lower temperature.
Call your local welding supplies store, they should have the Safety Silv.

I suppose you easily google an online supply shop?
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Old 03-30-2021, 04:25 PM   #10
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Default Re: What Material for Roll Cage/Chassis brazing?

There's always Amazon too.
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Old 03-30-2021, 05:12 PM   #11
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Default Re: What Material for Roll Cage/Chassis brazing?

My local hardware store had 56% silver solder and flux in stock which surprised me.

I will add that stainless steel isnt the best choice if you plan to paint the cage as stainless requires specific paints to adhere properly. But if you use silver solder with stainless the brazed joints are pretty close in color.
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Old 03-31-2021, 10:38 AM   #12
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Default Re: What Material for Roll Cage/Chassis brazing?

Alright, thanks for the help guys. I think ill go with 3/16 steel rod and Saftey silv 56.

Would it be unwise to use drill rod as the rods for the base chassis? Where I wouldn't need to bend it.
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