Just for the sake of comparison US munition production consumed 15000 US tons of tungsten during the war so that should give you a taste of the demand side of the equation.
source
source
- 1
https://www.google.fi/url?sa=t&sour...CDIwCQ&usg=AFQjCNFTTDWpwIUhsrrANq9_O6aLifNUDw
According to that Burma peaked at slightly higher output than Portugal during WW2. The mines in England peaked at less than 1/20th of that. Should still be significant enough to represent in the game though.
I suspect tungsten production in Burma was not particularly huge concern for Japan as they had so many other sources and this was the most distant from Japan.
Just for the sake of comparison US munition production consumed 15000 US tons of tungsten during the war so that should give you a taste of the demand side of the equation.
source
Some details on GER production of rare materials.
http://www.wwiiarchives.net/servlet/action/document/page/149/121/0