4130 Moly Links

[outlawfab Junior Member Find all posts View Profile Close outlawfab]

Hey guys I'm a little new to this TIG thing esp when it comes to picking fillers and tungsten. I did a search and couldn't find anything that was like what I'm doing so here it is... I have 2" OD 1/4" wall 4130 chromoly tubing for links on my mega truck and the weld in bungs are 4130 as well. I'm pretty sure to use the 2% correct? but what about filler? I've heard some people using a stainless rod on the moly. I know different applications call for different filler but I've also heard of people having luck with the er80s2. also the whole link bar is gonna be heat treated so will that change my use of filler? any help is appreciated.

[Showdog75 Senior Member Find all posts View Profile Close Showdog75]

If it's gonna be heat treated weld it with 4130 if not use er80sd2

[dave powelson Senior Member Find all posts View Profile Close dave powelson]

"heat treated"

......and by "heat treat" you mean ?????

normalize/stress relieve?

full bore harden and temper?

[JerseyWelder Senior Member Find all posts View Profile Close JerseyWelder]

Right, it's not heat treating chrome-mo it's normalizing it. Er80s2 will be fine.especially with both parts in chrome-mo

......and by "heat treat" you mean ?????

normalize/stress relieve?

full bore harden and temper?

[Showdog75 Senior Member Find all posts View Profile Close Showdog75]

If it's gonna be heat treated weld it with 4130 if not use er80sd2

I was referring to normalizing/stress relieving.

[H80N Senior Member Find all posts View Profile Close H80N]

ER-70 S2... NOT ER-80....

Please read this thread for clarity...

http://www.millerwelds.com/resources...043#post314043