Raimey,

On assumption that by "Osmund furnace" is simply ment crude furnaces used in 1400s-early 1500s to in Sweden make "osmund", that is, chunks of "pig" iron, then NO. Järnbruk (I been using swedish word cause it is easier to type) is simply an enterprize where iron ore is converted into "stångjärn" (long, heavy iron bars that were form of raw, mallable iron for selling to factories making it into products). Most high-quality stångjärn was sold abroad. Vallonska järnbruk used specific, two-hearth processes unique to Valloner. Other major type of hearth was "German", which used only one hearth, produced poorer quality iron and used more energy doing so.

Again, järnbruk in Uppland province were separate from locations where their output, that is, raw, mallable iron, was made into final products. Final product from Lancashire furnace at Karlholm järnbruk was walzed (rolled out) iron bars about 2 cm thick, maybe 10 cm wide and 2-3 meter long.

I know nothing of activities and names in Germany. I like Sauer and Merkel guns, and some German ammunitions. That's it.

Somewhere I have digital photo of Lancashire hearth at Karlholm. Will look for it. Major advantages of Lancashire hearth were lower cost to produce iron and faster production rates.

Niklas