Allegheny Technologies, Inc. NYSE: ATI is a specialty metals company headquartered in Pittsburgh, Pennsylvania in the United States. Allegheny Technologies is one of the largest and most diversified specialty metals producers in the world with revenue of $3.0 billion in 2009. ATI’s key markets are aerospace and defense, oil & gas, chemical process industry, electrical energy, and medical. Products are titanium and titanium alloys, nickel-based alloys and superalloys, grain-oriented electrical steel, stainless and specialty steels, zirconium, hafnium, and niobium, tungsten materials, forgings and castings.

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