ironmaster

iron +‎ master

ironmaster (plural ironmasters)

1. A manufacturer of iron
2. (dated) The proprietor of an ironworks
   • 1939 September, Charles E. Lee, “The Sirhowy Valley and its Railways—I”, in Railway Magazine, page 206:

     Thirdly, it incorporated Samuel Homfray, Richard Fothergill, Matthew Monkhouse, William Thompson, and William Forman, ironmasters, (described in the Act as intended lessees of the Tredegar Iron Works) as the Sirhowy Tramroad Company, with powers to make, at their own expense, the portion of the proposed tramroad from Sirhowy Furnaces to Nine Mile Point;