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TIMETAL® 551 (Ti-4Al-4Mo-4Sn-0.5Si) Titanium Alloy; <25mm

 

Subcategory: Titanium Alloy; Nonferrous Metal; Alpha/Beta Titanium Alloy

Material Notes:
Titanium content above is calculated as the remainder and may not reflect the actual range.

High-Strength Forging Alloy

Industry Specifications: UK Aerospace Specifications BS TA.38, 39, 40, 41, 42.

Features: TIMETAL 551 has high strength and is creep resistant up to 400°C. It has a similar composition to TIMETAL 550, apart from an increase in tin content, which gives increased strength at room and elevated temperatures. This is one of the strongest of the commercially available titanium alloys, with room temperature strengths ranging form 1250 to 1400 MPa. Typical applications include airframe structural forgings and machined parts such as undercarriage components, mounting brackets and pump casing where strength is required at low weight; and gas-turbine engine components. The alloy is also suitable for general engineering applications such as steam-turbine blades, axial and radial compressor parts, connecting rods, and other high-speed rotating and reciprocating components. It is nonmagnetic.

Typical heat treatment for this alloy: Solution heat treatment: 900°C for 1 hr, air cool. Ageing heat treatment: 500°C for 24 hrs, air cool.

Data provided by TIMET.

Available Properties
  • Density
  • Tensile Strength, Ultimate
  • Tensile Strength, Yield
  • Elongation at Break
  • Reduction of Area
  • Modulus of Elasticity
  • Poissons Ratio
  • Charpy Impact
  • Fatigue Strength
  • Fracture Toughness
  • Shear Modulus
  • Electrical Resistivity
  • CTE, linear 20°C
  • Specific Heat Capacity
  • Thermal Conductivity
  • Maximum Service Temperature, Air
  • Beta Transus
  
Property Data

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