NEW YORK--(BUSINESS WIRE)--Steel Partners Holdings L.P. (NYSE: SPLP), a diversified global holding company, today announced that, pursuant to a previously announced merger agreement, it has commenced an exchange offer to acquire the remaining shares of Handy & Harman Ltd. (NASDAQ: HNH), a diversified global industrial company, it does not currently own. Steel Partners currently owns approximately 70% of Handy & Harman's outstanding shares. Subject to the terms and conditions of the offe