Not sure if applicable, but Park Bros & Co produced a steel recipe including Tungsten/Wolframite via the Crucible Process packaged as >>Imperial<< Steel. Miller, Metcalfe & Purlin produced a steel recipe named >>Crescent<< steel. Both were analyzed in the 1890s. Not sure if they were still producing it or bar stock by 1905.

Cheers,

Raimey
rse