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QuesTek’s high-strength, corrosion resistant steel “Ferrium® S53” receives formal Aerospace Material Specification- SAE issues AMS 5922

January 29, 2008

Evanston, IL, January 29, 2008 – Earlier this month SAE International approved an Aerospace Material Specification for QuesTek’s new alloy Ferrium S53. QuesTek designed Ferrium S53 to be a drop-in replacement for 300M steel, which is commonly used today in military and commercial aviation for landing gear. S53 meets the ultimate tensile strength of 300M and has the added benefit of corrosion resistance, eliminating the need for toxic cadmium coatings and extending the life of landing gear components.

AMS 5922 covers the procurement of bars and forgings of S53 as a double vacuum melted (VIM/VAR) aerospace grade. SAE Committee F on corrosion and heat resistant alloys approved the specification for S53 premium aircraft-quality alloy steel. The specification itself covers material chemistry, processing, heat-treatment, and minimum property requirements.

The alloy was developed through the application of Materials by Design®, QuesTek’s computational materials systems-design methodology. Charles Kuehmann, QuesTek’s President and CEO, stated “Obtaining AMS 5922 is a significant milestone in the development of Ferrium S53. It demonstrates a high level of technical maturity for the alloy. We are also working towards the publication of minimum properties in the MMPDS handbook later this year to complement the Aerospace Material Specification.”

QuesTek has licensed Carpenter Technology Corporation and Latrobe Specialty Steel to produce and distribute Ferrium S53. Commercial and test quantities of S53 compliant with AMS 5922 are available from Carpenter today. Latrobe, a recent licensee, anticipates commercial availability later in 2008.

QuesTek Innovations LLC (www.questek.com) is a global leader in Integrated Computational Materials Engineering (ICME) technologies, serving government and industrial private sectors. Using its proprietary Materials by Design® methodology, QuesTek has rapidly developed breakthrough alloys (based on Fe, Cu, Al, Ti, Co, Mo, W systems), coatings, powders, and other materials that provide improved performance, reduced capital (as well as operating and maintenance costs) and provide competitive advantage. QuesTek has developed four steels that are being used in demanding aerospace and other applications, has a large portfolio of other materials nearing commercialization with more than 20 US patents awarded/pending and relevant international IP coverage. For more information, please contact Jeff Grabowski.

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