Reinhold Rücker Angerstein (October 25, 1718, at Vikmanshyttan – January 5, 1760, in Stockholm) was a Swedish metallurgist, civil servant and entrepreneur. Angerstein was a member of an old family of Swedish Iron Masters, of German descent. He passed his matriculation in Uppsala 1727 and then worked as an auditor at the Swedish Board of Mines (Bergskollegium) between 18 and 24 years of age. At the age of 31 he started a series of long journeys abroad, financed by the Swedish Association of Iron Masters (Jernkontoret). From these trips he wrote extensive and illustrated travel accounts back to Sweden. He primarily described technical and economic observations from mining and from Iron and Steel Works. Between 1749 and 1757 he was constantly travelling, with only few short spells in Sweden: in Germany, Austria, Italy, France, Portugal, Belgium, the Netherlands and Britain.
After returning to Sweden he got a position at Bergskollegium as Director of Steelworks (Direktör för rikets gröfre svartsmide). There exist illustrations also from his inspection tours of Swedish Iron Works. Towards the end of his life he purchased the Vira Iron Works in Uppland in 1757, northeast of Stockholm, renowned for forging of weapons for the army. He had far-reaching plans to extend this plant, but had no time to implement them before his death in 1760.
Between 1753 and 1755 he visited England and Wales, where he was considered an industrial spy. His visit to Sheffield was brief, less than a day, and it has been suggested that he was driven out of the town for showing too much interest in the crucible process newly invented by Benjamin Huntsman.[1]