Seeing books about "Early Industrial Development in Sweden and Russia" causes me to recall that in 1719 Russians actually raided many of Vallon Järnbruk in Uppland and did as much damage as they could. This caused some years of setback and rebuilding, which actually resulted in improved, more modern plants replacing those burned. Forsmark was one.

I cannot quickly find referances, but Russian iron from various parts of what is now Russia, heavily(?)from Novgorod(?) Principality (once an independent state), etc. was widely sold in Baltic lands. This was lower quality iron, as I recall, and competed directly with lower quality Swedish iron.

Niklas