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ALLOY TI 3AI/2.5V • UNS R56320 • WNR 3.7194

Ti 3AI/2.5V alloy is a near alpha, alpha-beta alloy, sometimes referred to as “half-6-4.” It offers 20 to 50% higher tensile strength than the commercially pure titanium at room and elevated temperatures. It is much more amenable to cold working than Ti 6AI/4V alloy and can be cold worked 75 to 85% to result in moderately high strength and good ductility. Furthermore, it is weldable as the commercially pure grades and has excellent resistance to torsion and corrosion.Ti 6Al/4V is significantly stronger than commercially pure titanium while having the same stiffness and thermal properties excluding thermal conductivity, which is about 60% lower in Grade 5 Ti than in CP Ti. Amongst its many advantages, it is heat treatable.

Therefore, it is used principally as tubing in aircraft hydraulic systems and as foil in aircraft honeycomb panels. Its applications include aerospace parts, sport equipments, medical and dental implants.

Available Tube Product form
Typical Applications
  • Architecture
  • Medical
  • Marine
  • Processing & chlorate manufacturing
  • Dimensional stable anodes
  • Desalination plants
Industries predominantly using this Grade
Typical Manufacturing Specifications
  • AMS 4943
  • AMS 4944
  • AMS 4945
  • AMS 4946
  • ASTM B338
  • Also individual customer specifications.

Technical Data

Mechanical Properties

Temper Annealed CWSR
Tensile Rm 90 ksi (min) 125 ksi (min)
Tensile Rm 620 MPa (min) 860 MPa (min)
R.p. 0.2% Yield 70 ksi (min) 105 ksi (min)
R.p. 0.2% Yield 485 MPa (min) 725 MPa (min)
Elongation (2” or 4D gl) 15 % (min) 10 % (min)

Physical Properties (Room Temperature)

Specific Heat (0-100°C) 427°K-1
Thermal Conductivity 7.6 W.m -1.°K-1
Thermal Expansion 7.9 mm/m/°C
Modulus Elasticity 107 GPa
Electrical Resistivity 12.6 μohm/cm
Density 4.48 g/cm3

Chemical Composition (% by weight)

Element Min Max
Al 2.5 3.5
C - 0.05
Fe - 0.3
H - 0.013
N - 0.02
O - 0.12
Ti Balance
V 2 3
Y - 0.05