Ohio Star Forge (OSF), a subsidiary of Japan’s Daido Steel, recently completed an expansion project that was announced last year. The Warren, Ohio-based company added 15,000 square feet to its existing building for a new machining division. OSF, which started with two forging machines and 23 employees, now employs 120 and runs five forging machines. The company primarily supplies forgings to the automotive market but has sought diversification into other markets, such as oil and gas, as well. In addition, OSF celebrates its 30th anniversary this month.