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Rulon Bearings
TIMET TIMETAL® 685 (Ti-6Al-5Zr-0.5Mo-0.25Si) Titanium Alloy
Categories: Metal; Nonferrous Metal; Titanium Alloy; Alpha/Near Alpha Titanium Alloy

Material Notes: High-Temperature, High-Strength Creep Resistant Alloy

Industry Specifications: Germany Aerospace: 3.7154. France: T-A6ZD. UK Aerospace Specifications BS TA. 43, 44.

Features: TIMETAL 685 possesses excellent tensile strength and creep resistance up to 520°C. It is weldable and has good forging characteristics. The alloy may be joined by the processes normally used in the fabrication of titanium, including argon-arc, electron beam and friction welding. Material should be fully heat treated prior to welding, and also given a suitable post-weld treatment. The weld zone of material treated in this way will have similar structure and properties to the parent metal. This alloy was specifically designed for the aero-engine industry. It is nonmagnetic.

Typical heat treatment for this alloy: Solution heat treatment: 1050°C for 30 mins, oil quench. Aging heat treatment: 550°C for 24 hours, air cool.

Data provided by TIMET.

Vendors:
Available Properties
  • Density, Typical
  • Tensile Strength, Ultimate, Typical
  • Tensile Strength, Yield, Typical
  • Elongation at Break, Typical in 5D
  • Reduction of Area
  • Modulus of Elasticity, Typical
  • Notched Tensile Strength, Kt=3
  • Poissons Ratio, Calculated by MatWeb
  • Fatigue Strength, alternating direct-stress (zero mean stress)
  • Fatigue Strength, alternating direct-stress (zero mean stress)
  • Fracture Toughness, K(IC); Typical
  • Shear Modulus
  • Charpy Impact, rod
  • Electrical Resistivity
  • CTE, linear
  • CTE, linear
  • CTE, linear
  • Thermal Conductivity
  • Maximum Service Temperature, Air, Good creep resistance
  • Beta Transus
  • Aluminum, Al
  • Carbon, C
  • Iron, Fe
  • Molybdenum, Mo
  • Nitrogen, N
  • Oxygen, O
  • Silicon, Si
  • Titanium, Ti, Calculated as remainder
  • Zirconium, Zr
  
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