Grade Ti-4.5Al-3V-2Mo-2Fe Alloy

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties


Titanium alloys have been developed by adding varying quantities of alloying metals to the base metal titanium. Each alloying metal helps to enhance the properties of corrosion resistance, ductility, durability, tensile strength etc.

Grade Ti-4.5Al-3V-2Mo-2Fe alloy is an alpha-beta alloy that is beta-rich with a fine microstructure and excellent super-plastic formability.

The following sections will discuss in detail about grade Ti-4.5Al-3V-2Mo-2Fe alloy.

Chemical Composition

The chemical composition of grade Ti-4.5Al-3V-2Mo-2Fe alloy is outlined in the following table.

Element Content (%)
Titanium, Ti 87
Niobium, Nb 6.5 - 7.5
Aluminum, Al 4-5
Vanadium, V 2.5 - 3.5
Molybdenum, Mo 1.8 - 2.2
Iron, Fe 1.7 - 2.3
Carbon, C ≤ 0.80
Oxygen, O ≤ 0.15
Nitrogen, N ≤ 0.050
Hydrogen, H ≤ 0.010
Yttrium, Y ≤ 0.0050
Other, each ≤ 0.10
Other, total ≤ 0.40

Physical Properties

The physical properties of grade Ti-4.5Al-3V-2Mo-2Fe alloy are tabulated below.

Properties Metric Imperial
Density 4.54 g/cm3 0.164 lb/in3
Melting point 1593°C 2899°F

Mechanical Properties

The following table shows mechanical properties of grade Ti-4.5Al-3V-2Mo-2Fe alloy.

Properties Metric Imperial
Tensile strength ≥ 960 MPa ≥ 139000 psi
Yield strength ≥ 900 MPa ≥ 131000 psi
Elongation at break ≥ 10 % ≥ 10 %
Hardness, Vickers 315 315

Thermal Properties

The thermal properties of grade Ti-4.5Al-3V-2Mo-2Fe alloy are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 7.71 µm/m°C 4.28 µin/in°F
Thermal conductivity 7 W/mK 48.6 BTU in/hr.ft².°F


Grade Ti-4.5Al-3V-2Mo-2Fe alloy is used in the following application areas:

  • Tools
  • Metal balloons
  • Metal wood heads
  • Wrist watch casings
  • Aerospace components
  • Automotive components
  • Mountain-climbing equipment.

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