TIMETAL 65A CP Titanium (ASTM Grade 3)


Subcategory: Metal; Nonferrous Metal; Titanium Alloy; Unalloyed/Modified Titanium

Key Words: UNS R50550

Component   Wt. %
CMax 0.08 
FeMax 0.3 
HMax 0.015 
N Max 0.05 
OMax 0.35 
TiMin 98.8 

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

Commercially Pure Titanium.

Industry Specifications: USA Aerospace: AMS 4900. Germany Aerospace: 3.7055. France: T-50. UK Aerospace Specification DTD 5023, 5273.

Features: The mechanical properties of CP titanium are influenced by small additions of oxygen and iron. By careful control of these additions, the various grades of commercially pure titanium are produced to give properties suited to different applications. TIMETAL 65A is equivalent to ASTM Grade 3. It is a general purpose grade of commercially pure titanium that has excellent corrosion resistance in highly oxidizing to mildly reducing environments, including chlorides, and an excellent strength to weight ratio. It offers the highest ASME allowable design stresses of any commercially pure grade of titanium. 65A also has good impact properties at low temperatures. It can be satisfactorily welded, machined, cold worked, hot worked, and cast. It is nonmagnetic.

Typical heat treatment for this alloy: Anneal at 700C for 1 hour and air cool. Stress Relieve at 500C for 30 mins and air cool.

Data provided by TIMET.

Physical PropertiesMetricEnglishComments
Density4.51 g/cc0.163 lb/in Typical

Mechanical Properties
Tensile Strength, Ultimate585 MPa84800 psi Typical
Tensile Strength, Yield450 MPa65300 psi Typical 0.2% Proof Stress
Elongation at Break25 %25 % Typical
Reduction of Area48 %48 % Typical
Modulus of Elasticity105 - 120 GPa15200 - 17400 ksi Typical
Fatigue Strength116 MPa16800 psi Notched, Kt=4; limit at 10^7 cycles; rotating bend (sample with UTS = 589 MPa)
Fatigue Strength116 MPa16800 psi Notched, Kt=3.3; limit at 10^7 cycles; rotating bend (sample with UTS = 550 MPa)
Fatigue Strength123 MPa17800 psi Notched, Kt=3; limit at 10^7 cycles; rotating bend (sample with UTS = 589 MPa)
Fatigue Strength147 MPa21300 psi Notched, Kt=2; limit at 10^7 cycles; rotating bend (sample with UTS = 589 MPa)
Fatigue Strength170 MPa24700 psi Notched, Kt=2; limit at 10^7 cycles; rotating bend (sample with UTS = 550 MPa)
Fatigue Strength247 MPa35800 psi Notched, Kt=1.5; limit at 10^7 cycles; rotating bend (sample with UTS = 550 MPa)
Fatigue Strength263 MPa38100 psi Smooth, Kt=1; limit at 10^7 cycles; rotating bend (sample with UTS = 550 MPa)
Fatigue Strength278 MPa40300 psi Smooth, Kt=1; limit at 10^7 cycles; rotating bend (sample with UTS = 589 MPa)

Electrical Properties
Electrical Resistivity5.4e-005 ohm-cm5.4e-005 ohm-cm 

Thermal Properties
CTE, linear 20C8.6 m/m-C4.78 in/in-F 20-100C
CTE, linear 250C9.5 m/m-C5.28 in/in-F 20-300C
CTE, linear 500C9.7 m/m-C5.39 in/in-F 20-500C
Thermal Conductivity21.79 W/m-K151 BTU-in/hr-ft-F 
Maximum Service Temperature, Air425 C797 F Continuous
Maximum Service Temperature, Air540 C1000 F Intermittant
Beta Transus920 C1690 F 


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