The Globe and Mail reports in its Tuesday edition a Brookfield Asset Management affiliate has agreed to acquire GrafTech International in a deal that values the maker of carbon and graphite products at an estimated $692.8-million (all figures U.S.). A Dow Jones dispatch to The Globe says Brookfield will acquire GrafTech's stock in a tender offer of $5.05 a share, a 2-per-cent premium over Friday's closing price. The planned deal follows a preliminary accord unveiled late last month. During April, GrafTech said it had reached a preliminary pact with Brookfield under which Brookfield would make a $150-million preferred equity investment in GrafTech, along with a preliminary deal to acquire the company. Holders of 11 per cent of GrafTech shares, including director Nathan Milikowsky, have agreed to tender their shares to the offer. GrafTech has faced challenging global markets in both its main lines of business.