ATI BUSINESS SYSTEM Glossar y of Terms BAR BILLET NIOBIUM NICKEL-BASED SUPERALLOYS COMMODITY FLAT-ROLLED PRODUCTS PLATE EXOTIC ALLOYS FLAT-ROLLED PRODUCTS HAFNIUM HIGH PERFORMANCE METALS HIGH VALUE FLAT-ROLLED PRODUCTS INGOT SILICON ELECTRICAL STEEL SHEET WIRE ZIRCONIUM ROD RAW MATERIALS PRECISION ROLLED STRIP ® PRODUCTS STAINLESS STEEL STRIP SUPERALLOY SUPER STAINLESS STEEL TANTALUM TITANIUM TUNGSTEN MATERIALS 70 Annual Report 2003 ATI An exotic alloy valued for its strength, high  corrosion resistance, and low thermal neutron absorption. Applications include nuclear reactors, marine vessels, commercial power generation, and those requiring contact with strong acids and basic environments. A long product that is from 0.030 inch (0.76 mm) to 1/4 inch (6.35 mm) in diameter, in round, square, octagonal or hexagonal cross-sections. Include tungsten and tungsten carbide powders, sintered tungsten carbide products and cutting tools for the metalworking, mining, oil and gas, and other industries requiring tools with extra hardness. Iron-based alloys containing silicon (typically 3.5%) as the major alloying addition.These steels are  used generally in applications such as power  transformers where electrical conductivity and magnetic properties are important. A flat-rolled product that is 24 inches (610 mm) and over in width and less than 3/16 inch  (4.76 mm) thick. A long product that is from 0.118 inch (3 mm) to  3/4 inch (19 mm) in diameter. Titanium and its alloys have very high strength- to-weight ratios. At normal temperatures, they have high resistance to corrosion. Used primarily in aerospace and chemical processing applications. An exotic alloy having high corrosion resistance; used for medical implants, chemical process  equipment and aerospace engine components. Used in the production of the Company’s specialty materials are scrap (containing iron, nickel, chromium, titanium and molybdenum), nickel, titanium sponge, zirconium sand and sponge, ferrochromium, ferrosilicon, molybdenum and its alloys, ammonium paratungstate and its alloys, manganese and its alloys, cobalt, niobium, and other alloying materials  Stainless steel alloys with significant additions of chromium, nickel, molybdenum or copper. Super stainless steel is used in chemical processing, petroleum refining, marine, heat treating, pollution and waste control industries where there are requirements for extra corrosion protection, strength or heat resistance. Flat-rolled products including stainless steel, nickel-based alloys, titanium and titanium alloys, and carbon steel under 0.015 inch (0.38 mm) thick and up to 48 inches (1,219 mm) wide, as well as certain strip products with special tempers and thicknesses. An alloy, usually based on nickel, cobalt or  iron, developed for high temperature service where relatively severe mechanical stressing is encountered and where high surface stability is frequently required. A flat-rolled product that is 3/16 inch (4.76 mm) thick, or greater, and over 10 inches (254 mm) wide. A flat-rolled product 3/8 inch (9.5 mm) to under 24 inches (610 mm) wide and less than 3/16 inch (4.76 mm) thick. See also Precision Rolled Strip ® Products. An exotic alloy valued for its strength at extremely high temperatures and its ability to superconduct, or pass electricity with minimal resistance, at  very low temperatures. It is used in aerospace applications, in superconducting magnets in MRI (magnetic resonance imaging) equipment, when alloyed with titanium, and in particle accelerators. A broad classification of iron-based alloys  containing at least 10% chromium, known for excellent corrosion and heat resistance. Austenitic  (Chrome-Nickel) grades contain 18% to 30% chromium and 4% to 20% nickel for enhanced  surface quality and formability and increased  corrosion and wear resistance.These grades are used in appliances, kitchen utensils, processing equipment and a variety of industrial applications. Ferritic (Chrome) grades are non-nickel-bearing and contain 11% to 17% chromium content for greater inherent strength and corrosion resistance than carbon steel.These grades are often used in automotive exhaust systems. Nickel-based alloys developed for very high temperature service where relatively high stresses are encountered and where high surface stability is frequently required.Typical applications are aircraft turbine and land-based turbine components. A product form classification that includes ingot, billet, bar, rod and wire. LONG PRODUCTS A systemic and integrated business system  adopted throughout ATI modeled after the Toyota Production System and built on 3 fundamental principles: Make to Use, Elimination of Waste and People Connect the System. A long product that is 1/4 inch (6.35 mm) or more in diameter, having round, square, octagonal or hexagonal cross-sections. A long product with a diameter range of 8 to 14 inches (203 to 356 mm). Can either be sold in  billet form or processed further to make other long products. A classification that includes the Flat-Rolled Products segment’s stainless steel hot and cold rolled sheet and plate products along with silicon electrical steel and tool steel products. The Company’s classification for its zirconium, niobium, hafnium and tantalum products. A product form classification that includes plate, sheet, strip and Precision Rolled Strip ® products. An exotic alloy usually obtained as a by-product of zirconium production with outstanding corrosion resistance and good mechanical properties. It is added to specialty alloys for use in jet engine parts and as control rod material in nuclear reactors. A classification that includes the Company’s  nickel-based and cobalt-based alloys and superalloys, titanium and titanium alloys, specialty steel and exotic alloy products, primarily in the form of long products.These products typically exhibit any of the properties of high temperature resistance, high strength and high temperature oxidation resistance. A classification that includes the Flat-Rolled Products segment’s Precision Rolled Strip ® , standard strip, super stainless steel, nickel-based alloy and superalloy and titanium and titanium- based products.These products typically are at the higher end of the segment’s product price range and are characterized by direct technical and  service relationships with customers. A product form resulting when molten metal is cast into molds, which can be round, square, or rectangular. Can either be sold in ingot form or processed further to make other products. For further information and additional definitions, please see Glossary of Terms by visiting us at www.alleghenytechnologies.com.