MAYFIELD HEIGHTS, Ohio (AP) â¿¿ The Alloy Products division of Brush Wellman Inc. announced Wednesday a worldwide increase in prices on some premium grades of beryllium alloy and copper alloy products. Starting Oct. 4, prices will increase 5 percent on the company's Moldmax group of alloys. Beryllium is a lightweight metal that is used in aerospace components, semiconductor chips, jet engine blades, transistors, nuclear reactors and nuclear weapons. It often is mixed with other metals to form an alloy. Brush Wellman is a subsidiary of Brush Engineered Materials Inc., based in Mayfield Heights. Brush Engineered Materials makes parts for the consumer electronics, aerospace, auto and other industrial markets. Shares of Brush Engineered Materials rose 17 cents, or 0.7 percent, to $25.79 in trading Wednesday.