Titanium Metals Corporation

TIMETALŪ550 HIGH-STRENGTH FORGING ALLOY
Ti-4Al-4Mo-2Sn

TIMETAL 550 is a medium strength, forgeable alpha beta alloy. In the solution treated and aged condition, the alloy has superior tensile and fatigue properties compared to TIMETAL 6-4 combined with good elevated temperature tensile strength and creep properties up to 750°F (400°C). TIMETAL 550 has applications in the aerospace industry, both as aeroengine and airframe components. Typical applications include compressor discs and flap tracks. The alloy has also found applications in high performance automotive engines. The alloy may be welded using controlled electron beam or laser welding techniques. Slow welding speeds and low cooling rates are necessary to achieve adequate weld properties. In sheet form, the alloy has good superplastic properties and excellent balance of strength and toughness.

Table 1:Chemical CompositionFigure 1: Effect Of Temperature On Tensile Properties
Table 2: Physical PropertiesFigure 2: Creep And Stress Rupture Properties Of TIMETAL 550 Rod
Table 3: Guaranteed Minimum Mechanical PropertiesFigures 3a, b and c: Fatigue Properties Of TIMETAL 550
Table 4: Typical Notch Tensile And Fracture Toughness Properties
Table 5: Heat Treatment
Table 6: Room Temperature Tensile Properties Of Timetal 550 Sheet

Download the TIMETAL 550 Data Sheet in Adobe Acrobat Reader format.

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