Castle Metals France Formerly known as Transtar Metals (France), we acquired this subsidiary in 2006 to expand our global footprint. We offer comprehensive inventory of sheet, plate, bar, tube & extrusions. Castle can also cut-to-size, per our customers’ requirements. A. M. Castle & Co Castle Metals A. M. Castle Canada A. M. Castle Singapore A. M. Castle Shanghai Castle Metals Mexico Castle Metals France Castle Metals UK Castle Metals Aerospace H-A Industries Oliver Steel