MattZ28

My welder isn't quite sure what grade/size rod to use to weld the Ti bypass pipes into my exhaust. If anyone could provide any insight, I'd appreciate it!

Thanks
Matt

Just Enough

Pure titanium rod or Ti 6-4, either will work because this is a low strength fill application. Typically you would want to match the alloy you are welding together with the same or preferrably an overalloyed fill wire.

MattZ28

What diameter rod do you recommend? he said .093 is too thick to do a nice job...

MattZ28

ttt...c'mon guys my car is too quiet!

Just Enough

1/16th or .063, If your welder can't tell you what size filler wire he wants to use, do you think he should be welding your Ti mufflers? Welding titanium is easy compared to cutting contoured holes and creating close fitting complex shapes in titanium tubing.

MattZ28

He's done it before, just not on a regular basis. He wasn't sure what size rod to use as he's never done a Ti automotive exhaust...mainly aviation repairs.

BlackZ06

Is he protecting BOTH sides of the weld with Argon ???? Ti is contaminated by air when hot and becomes VERY brittle (the weld won't hold) unless both the front and back (the interior and exterior) of the weld are protected.

http://www.timet.com/fab-p27.htm

(Timet is the supplier of the original Ti to Arvin Meritor for fabrication of the Corvette exhaust)

I would think, if he has welded titanium before, he'd know what wire size to use. Titanium is common on military aircraft, and somewhat common on commercial planes ... it is rarely seen in "General Aviation" applications ....

donnie90stang

The ones i did were not submerged, or purged with argon. They are still on and doing fine.