# Question 1044b

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, $\text{melting point}$, 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.