Titanium Welding

[r33_racer]

ive done it before with bungs at each end and one end with a nipple for gas line hooked up from another bottle and constantly purging. Just not on Ti. But a mate does repairs on aircraft bits and he said they have an inert enclosure thats full of gas and they weld in that...arms through gloves...like a sand blasting cab.

[wht510]

Aircraft have minimum requirements that would make your eyes boggle,

For exhausts/intercooler pipe I wouldn't even bother purging.

[ylwgtr2]

I weld it all the time at work...i just use normal tig and set up same as stainless

[r33_racer]

Interesting. Cheers for that

[Nee-san]

It largely depends on what you can get.

In Melbourne I couldn't find anything. From memory a company called Austral Wright metals used to have something, but I don't think they do any more. Most of the time you have to import it.

Good luck in finding a dealer. I've lost all my contacts

Perhaps try ebay:

stores.shop.ebay.com.au › eBay Stores › TITANIUM JOE

or similar...

Grade 5 (Ti6Al4V) is one good grade, but pretty expensive.

Grade 18 (Ti3Al2.5V) is a good one for exhausts as it has palladium alloyed into the titanium alloy which increases corrosion resistance. But we really are splitting hairs. The best corrosion resistance is stainless though. But can't compete with the lightness of Ti.

Basically as I said before, any titanium alloy is good as long as you can get it as they all share very good corrosion resistance with a light weight.

Unfortunately trying to find someone who can mandrel bend Titanium is non existent. That's why everyone has to do lobster cut/welds. I did ask alloy bull bar manufacturers, but they said they wouldn't look at it due to the strength of Ti compared to Al, even if it was annealed!

Another alloy which is excellent for exhaust headers (ie extractors) particularly for turbo applications is the super alloy "InConel". Now this is better than titanium as it has a higher heat resistance, and therefore is harder to weld. It's used exclusively for super cars and formula 1 and other high end race applications where the engineers have an unlimited budget. But you'd have to buy a couple of tonnes (or something like that), and auction off one of your kidneys at the same time for the funds. I'd only use that for headers though. Not full exhaust systems.

Group A GT-R's had Inconel headers, it is also used widely in turbochargers.

[r33.93]

all i do is weld ti, ss and all those types of metals when u weld it with tig use argon sheilding gas and make sure to back perge the weld zone. or u will contaminate the inside of the pipe witch will lead to cracking if u have any other questions pm me and ill try giv ya some help