TIG filler questions

Hard to believe a store doesn't stock ER70S-2. You can order small quantities from

S-6 does work, but be careful about silica slag deposits on the surface if you are doing a multipass weld.

I wish S-3 hadn't disappeared from the market. It was useful stuff.

If you are ordering from tigdepot.com, go ahead and buy 1 lb. of ER80S-B2. It is great stuff for 4130 chrome-moly, and for TIG welding bandsaw blades.

I have it in 0.045" and 1/16".

BTW the "B" in the S-B2 suffix means it has a little chromium and molybdenum added, hence why it is so good on 4130.

Thanks for the reply including additional information. I didn't know I wanted those answers too, but I did now that I know.

More questions:

Most useful (compared to S-2) for what? It is listed in the Air Liquide handbook "Welding Processes and Fillers Metals Data Book" (published 1995). I have not talked with Air Liquide so do not know if it is still carried.

This reads as a good idea. I presume the 0.045 is the size for bandsaw blades. Eh?

Finally, I guess you missed my question about silicon bronze. Is it available in .045" spools or cut lengths? While I am at this, I have never heard of MIG brazing. Is there such a process?

Ciao, David

It was used as a step between S-2 and S-6. More deoxidizers than S-2, but less slag than S-6

Yes you can get small 2 lb. spoolgun spools of silicon bronze wire for TIG brazing.

I have done a lot of MIG brazing, especially on stainless steel. Less heat distortion than welding and no burn through. I did it with my readywelder to assemble 180 feet of stainles steel railings. Use Argon or Argon/Helium gas.