riveting alu to titanium 1

[christopher67]

I need to replace a rivet that is holding an alu part to a titanium tube of a 35 year old bicycle. The rivet is quite rusty.

It will see only mild weather, and will mostly be inside, with possibly an occasional exposure to rain.

What material rivet will be best for this application?

 

[WKTaylor]

Monel/SStl blind rivet [pop-rivet] or industrial blind rivet or bolt... installed 'wet' with zinc-chromate spray primer... or RTV-sealant.

 

[EdStainless]

853 is more versatile.
You can use about any joining method.
In order to damage 953 you have to seriously overheat it.
I wouldn't trust that person to build in 853 either.
My daughter rides a very light 921 frame that is all TIG welded.
I should have had one built for me when I had hers built ....

 

[LittleWheels]

Eutectic silver-soldered 953 frames from several builders fell apart from the same intergranular corrosion cause. You need very good torch control to fillet braze in eutectic silver, otherwise you just get expensive puddles on the floor.

 

[TugboatEng]

Do you have any information on the alloy used? I'm assuming it's a brazing alloy and not solder. When I look up eutectic solder I get lead containing alloys which probably wouldn't be allowed anyways.

 

[LittleWheels]

Generally <50% silver, otherwise it is almost impossible to build up a fillet i.e. lugged only.

Framesaver

Rods & Wire

We carry Columbus tubing as well as lugs, dropouts, fork crowns, and braze-ons. We also have proprietary goods and items from Gasflux, Harris, Weld Mold, 3M.

framebuildersupply.com

BRAZING FILLER ROD — BICYCLE FABRICATION SUPPLY

Bicyle Fabrication Supply - Brazing rod by Gasflux , C-04 and GF-78 in 1/16 and 3/32

www.bikefabsupply.com

 

[LittleWheels]

Generally <50% silver, otherwise it is almost impossible to build up a fillet i.e. lugged only.

Framesaver

Rods & Wire

We carry Columbus tubing as well as lugs, dropouts, fork crowns, and braze-ons. We also have proprietary goods and items from Gasflux, Harris, Weld Mold, 3M.

framebuildersupply.com

BRAZING FILLER ROD — BICYCLE FABRICATION SUPPLY

Bicyle Fabrication Supply - Brazing rod by Gasflux , C-04 and GF-78 in 1/16 and 3/32

www.bikefabsupply.com

There are several builders who fillet brazed stainless steel tubing (not just Reynolds 953, when it was available).
https://www.moultonbicycles.co.uk/features.html scroll down to the seat post clamp for an example of eutectic silver fillet brazing of stainless tubing
https://pedal-trikes.blogspot.com/2011/05/trykit-in-953.html the English still race upright tricycles and lugged construction is not an option

 

[XR250]

I need to replace a rivet that is holding an alu part to a titanium tube of a 35 year old bicycle. The rivet is quite rusty.

It will see only mild weather, and will mostly be inside, with possibly an occasional exposure to rain.

What material rivet will be best for this application?

I'm a little late to the game here. Why not coat a Rivnut in grease? https://www.rivetnutusa.com/rivnut-rivet-nut/
That is how most of my bottle cages are held on to my bikes.

 

[mfgenggear]

darn simple fix. pop rivet and be done.
drill out, burr , paint install rivet.
recommend as David said move to engineering hobbies