AMS4924 Ti5Al2.5Sn ELI Titanium Alloy Bars, Forgings, and Rings

  • Grade: Ti5Al2.5Sn ELI
  • Annealed condition
  • High Ductility and Fracture Toughness
  • Good Strength and Cold Workability
  • Corrosion Resistance
  • Biocompatibility

Features

AMS4924 Ti5Al2.5Sn ELI Titanium Alloy Bars, Forgings, and Rings, Annealed

Chemical Composition (wt.%) of AMS4924 Ti5Al2.5Sn ELI Titanium Alloy Bars, Forgings, and Rings

Element Min Max
Aluminum 4.70 5.60
Tin 2.00 3.00
Iron 0.25
Oxygen 0.12
Oxygen + Iron 0.32
Carbon 0.05
Nitrogen 0.035 (350 ppm)
Hydrogen 0.0125 (125 ppm)
Yttrium (3.1.1) 0.005 (50 ppm)
Other Elements, each (3.1.1) 0.05
Other Elements, total (3.1.1) 0.40
Titanium remainder

Mechanical Properties (Annealed Condition) of AMS4924 Ti5Al2.5Sn ELI Titanium Alloy Bars, Forgings, and Rings

Property Value
Tensile Strength 828 MPa (120 ksi) minimum
Yield Strength (0.2% Offset) 759 MPa (110 ksi) minimum
Elongation in 2 inches (50mm) 10% minimum
Reduction of Area 20% minimum

Technical Specifications

Specification Value
Standard AMS4924 Ti5Al2.5Sn Titanium Alloy Bars, Forgings, and Rings, Annealed
Grade 5Al-2.5Sn ELI, Ti5Al2.5Sn ELI
Melting Practice Alloy shall be multiple melted. The first melt shall be made by vacuum consumable electrode, nonconsumable electrode, electron beam cold hearth, or plasma arc cold hearth melting practice. The subsequent melt or melts shall be made using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final melt cycle.
Type Bar, Wire, Forgings, Rings
Dimension Bar Dia: 0.25 to 12 inches (6.35 to 304.8 mm), Length up to 20 feet (6096 mm)
Wire Dia: 0.020 to 0.500 inches (0.51 to 12.7 mm)
Block: Width: 2 – 24 inches (50 -610mm) x Height: 2 – 24 inches (50-610mm) x Length: 2 – 20 feet (610-6100mm)
Rings: OD: 250-1500mm, ID: 150-1400mm, Height: 20-500mm
Density 4.48g/cm³
Condition Bars: Hot finished with or without subsequent cold reduction, annealed, and descaled. Bar shall be processed to the final thickness/diameter by metallurgical working operations prior to any straightening, dimensional sizing, or surface finishing operations. Bar shall not be cut from plate.
Wire: Cold drawn, annealed, and descaled.
Forgings and Flash Welded Rings: Annealed and descaled. Flash welded rings shall not be supplied unless specified or permitted on purchaser’s part drawing. When supplied, they shall be manufactured in accordance with AMS7498
Inspection Certificate EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection)
Tests Chemical Composition, Mechanical Properties
Key Features

High Ductility and Fracture Toughness: Compared to standard Ti-525, the ELI variant exhibits significantly higher ductility and fracture toughness, making it more resistant to crack propagation and brittle fracture. This is crucial in applications involving cyclic loading, impact loading, or stress concentrations.
Good Strength and Cold Workability: Ti-525 ELI retains Ti-525’s good strength and excellent cold workability, allowing for the formation of complex shapes and intricate designs.
Corrosion Resistance: It is well-resistant to corrosion in various environments, including seawater, chloride solutions, and some acids.
Biocompatibility: Ti-525 ELI is biocompatible, making it suitable for medical implants and devices.

Packing

Packed in plywood boxes.

Applications

Critical aircraft structural components: These are used for parts requiring high fatigue resistance and damage tolerance, such as landing gear components, airframe structures, and fasteners.
Cryogenic applications: Employed in cryogenic tanks and systems due to its excellent low-temperature properties.
Implants: It is particularly suitable for implants requiring high fatigue resistance and ductility, such as hip and knee joint replacements, spinal implants, and bone plates.
Surgical instruments: Utilized for instruments requiring strength, corrosion resistance, and precision.
Subsea equipment: Employed for components in subsea oil and gas exploration and production equipment where resistance to crack propagation and fatigue is critical.
Process equipment: Used for components in chemical processing equipment exposed to corrosive environments where high ductility is desired.

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