Question

Question #1044b

Answer 1

I think you speak of the [Langmuir torch..........](https://en.wikipedia.org/wiki/Atomic_hydrogen_welding)

Explanation:

This is not something I have done, whereas I have used an oxy-acetylene torch. The signal advantage of the Langmuir torch is that you can reach temperatures of approx. `3500` `""^@C`, whereas if you use an oxyacetylene torch you can reach temperatures of max. `3000` `""^@C`.

And such a temperature allows us to weld the most refractory metal, tungsten, `"melting point"`, `3422""^@` `C`. This is probably the preserve of a specialist rather than a handyman. Again, I don't know under what circumstances you would want to weld tungsten - I have no doubt that there are some.