News From the Auto Industry

December 28, 2007

General Motors predicts rise in powder metal sprockets

Filed under: Fuel Economy — Administrator @ 12:53 am

Located at 767 Fifth Avenue in Manhattan, the General Motors Building at Trump International Plaza occupies a full city block between 58th and 59th streets. In addition to General Motors, the prestigious building houses Estee Lauder, Barron Assets and the legal firm of Weil, Gotshal & Manges LLP. CBS Television broadcasts its “Early Show” and other programs live from the building.

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GM sources said the powder alloy steel sprockets have greater strength and longevity than hardened cast iron units, and cost less to machine. In recognizing the sprockets for its 1998 grand prize for ferrous powder metal applications, the MPIF described the Stackpole-made parts as having teeth and journal areas selectively densified to a typical surface density of 7.8 grams per cubic centimeter: a minimum ultimate tensile strength of 125,000 pounds per square inch; a yield strength of 120,000 psi; and a journal rolling contact fatigue strength of 580,000 psi.

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