BB/ST/DT Junction How Do You Tig It?

Education
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TIG Welds (velocipedesalon.com)
There’s some good info here about Weldmold 880 (AKA ER312). Also check out the heat affected zone on Archibald’s welds (IIRC that’s Don Ferris from Anvil … someone correct me if I’m wrong).

My quick and dirty summary is that ER312 wets out a bit better and seems to be a bit less “sticky” than ER70-S2 — this was especially true when I was a newbie. There’s less of a difference now.

100% agree about wanting a clear right/wrong esp when starting out.

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I’m going to have to dig up my V Salon login to read that one :rofl:

I also did not think about how many stainless joints NMW bikes use. There would be no good reason to swap fillers between joints.

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Er312 is designed specifically for joining dissimilar metals but also works fine for similar metals. Our frames use a lot of stainless so Er312 is a must, even if I wasn’t using any stainless I’d stick with Er312 because I like the characteristics better.

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