TIMETAL 6-4 is a general-purpose alpha-beta alloy in widespread use. It contains a favorable balance of properties with moderately high tensile strength, good fatigue strength, with intermediate fracture toughness. Reasonable properties are retained up to about 350°C (660°F). Most properties are affected by the microstructure, which is determined by the thermomechanical history. This alloy is hardenable in sections up to 1.0" thick and is weldable by various methods pr ovided the joint area is clean before welding. In most of the welding methods, an inert gas or vacuum envir onment is required during welding. TIMETAL 6-4 alloy is highly resistant to general corrosion in sea water. This alloy is offered in several variants. The ELI (ASTM Grade 23) variant is available for fracture critical applications. The 0.1Ru ELI variant (ASTM Grade 29) of this alloy is avail able for enhanced corrosion resistance. TIMETAL 6-4 alloy and its variants has been used in air-frames, jet engine & rocket components, pressure vessels, fasteners, prosthetic implants, geothermal-well casings, automotive components and sports equipment. This alloy is available in most common product forms including billet, bar, wire, plate, and sheet.