Mexico’s steelmaker Imsa is buying the steel division of Australia’s Broken Hill Propietary for about $230 million. Imsa already makes auto batteries and construction equipment in the US. Imsa recently failed in its attempt to merge with rival steel company Ahmsa that already has a US operation. Imsa bought BHP’s west coast Coated Steel Corp. BHP is selling plants in Washington state and California as well as seven regional processing and distribution centers.