I believe you have to weld Ti in the absence of O2, which I believe I have a place that can do it :yesnod:

BUT....does anyone know if you can weld Ti to Stainless steel??

thanks

 

Welding of titanium by various processes is widely practised and service performance of welds is proven with an extensive and continuously extending record of achievements. Newer methods adaptable to titanium are further advancing the science, technology and economics of welding (for example at The Welding Institute).

Most titanium alloys can be fusion welded and all alloys can be joined by solid state processes. Unfortunately some engineers still believe titanium is difficult to weld, possibly due to its particular requirements for argon or helium gas shielding, or because in the past it has normally been handled only by specialist fabricators. Titanium is actually easier to weld than many metallurgically more complex metals and alloys.

Weldability of the commonly used ASTM Grades

ASTM Grades Weldability Comments
1,2,3,4,7,11,12,13,141
5,16,17,26,27 Excellent Commercially pure titanium and low alloy grades with minor additions of Pd, Ru, Mo etc.
9,18,28 Excellent Ti-3Al-2.5V alloy grades
5,23,24,29 Fair - Good Ti-6Al-4V alloy grades

Welding and joining methods appropriate to titanium include:
Arc Welding Processes, Tungsten Inert Gas (TIG), Metal Inert Gas (MIG), Plasma Arc (PAW).
Power Beam Processes, Laser and Electron Beam (EB)welding.
Resistance Welding, Spot, Seam and the Resista-CladTM cladding process.
Friction Welding, Rotary, Radial, Linear, Orbital, Stir, Stud and other specific jointing techniques.
Diffusion Bonding
Forge Welding
Explosive Bonding
Brazing
Soldering
Adhesive Bonding

 

It is technically possible, but not practical.

What you need to do is first weld a 3rd type of metal that can be commonly welded to both steel and ti, then weld the two together, so as not to directly mix the steel and ti material in the welded joint.

You could try asking welding shops in your area about it, they would be able to answer this best.

And even if I'm wrong and you can weld them together...if my guess is right and your asking this for an exhaust project, keep in mind ti and steel (or SS) have substantially different thermal expension rates, and any such welded joint would likely not hold up to high temp cycles.

:cheers:

 

Tony---

The simple answser you seek, is, unfortunately, NO.

 

Hey Tony,

Check out the Nordam Group in Oak city, they are FAA approved repair facility specializing in repairing jet engine nacelles, (stainless/titanium) structures.

 

You cannot weld Ti to steel or ssteel period!

 

just dont do what a local guy here did. he welded long tips onto the end of the existing steel tips on his z06. now he has 4 tips stick about a foot out the back of his z06. looks gay as hell.

 

What the hell was he smoking?

 

I hear all the nos, but the above sounds like you can??? TIG and MIG if I am reading it correctly!??!?

:confused:

yes, I want to weld some B&B speedway tips to an 02 up Z oh Ti exhaust :cool:

can it be done????

thanks

R
A
T

 

trust me - the entire state of kansas is still trying to figure that one out. even the ricers look puzzled when they see it.

 

That quote above dealt with welding titanium (and it's alloys) only. It had nothing to do with welding Ti to SST.

Ti is very commonly TIG welded, MIG is also possible. But again, fusing it to steel or stainless steel is a whole 'nother ballgame.

:cheers:

 

Ditto :withstupid:

 

:banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry :banghead: :cry

thanks for the info :(

R
A
T

 

Welding Ti take proper setup (purge, etc...) I would have to agree that welding tips to a Ti exhaust would be a very bad idea to try. Molten titanium reacts readily with oxygen, nitrogen and hydrogen, exposure to these compounds during welding can adversely affect weld properties and must be minimized. Titanium cannot be welded to most other metals due to the formation of embrittling compounds that can lead to cracking.


Sorry...


[Modified by J-Rod, 9:33 AM 12/9/2003]

 

Have a stainless pipe welded to the speedway tips that can be bent to shape and then slip-fit over the titanium outllet.


[Modified by Blocktrdr, 11:30 AM 12/9/2003]

 

GREAT idea.....there are 2 outlets on the Ti.....that would ensure proper alignment of the tips with no twisting...

how would i secure them to the Ti pipes????

thanks for the great idea !!!

R
A
T

 

tony
There is a loctite formula that is supposed to be permanent (think it is green) that should give a clean appearence. Slip fit would need to be very tight. If that doesn't work, there is always j.b. weld. Its designed to take a lot of heat.
I admire your tenacity with the project!
g

 

If I remember correct, the pipes have to turn pretty quick to clear the storage well. If you could get an inch of pipe coming out straight it would be plenty. You do not need alot and the slip-fit could be secured with a band clamp.(the kind for mufflers, not the kind for rubber hoses) Remember, this is all after the muffler so minute leaks are not a big deal here. I would connect the outboard pipe to the tip. Then you have two choices. You could patch the other pipe in to the first one, or you could run it to the tip and cut a second hole for it. Either way, I would cut the original pipe from the speedway tip off an inch or so from the tip. Then slip the intermediate pipe over it. This way you get to really get everything aligned. Then you can weld the intermediate pipe right where it meets the flat part of the tip and you will not see the connection.

All this may sound complicated, but I bet it would be pretty cheap to do at a muffler shop.


[Modified by Blocktrdr, 7:09 PM 12/9/2003]


[Modified by Blocktrdr, 8:25 PM 12/9/2003]

 

Oh, one last thing. I would connect the second intermediate pipe after getting the tip all aligned.

 

Slip fit => clamps? SR-71 = Ti; rivets (or is expansion rate a problem with these two metals in this application)? Wire, wound and wrapped very tightly around the Ti then welded to the SS?