TIMETAL® 65A CP Titanium (ASTM Grade 3)
Subcategory: Metal; Nonferrous Metal; Titanium Alloy; Unalloyed/Modified Titanium
Key Words: UNS R50550
Component  Wt. %    C  Max 0.08   Fe  Max 0.3   H  Max 0.015   N  Max 0.05   O  Max 0.35   Ti  Min 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: T50. 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 700°C for 1 hour and air cool. Stress Relieve at 500°C for 30 mins and air cool. Data provided by TIMET.
Physical Properties  Metric  English  Comments 

Density  4.51 g/cc  0.163 lb/in³  Typical 
Mechanical Properties 

Tensile Strength, Ultimate  585 MPa  84800 psi  Typical 
Tensile Strength, Yield  450 MPa  65300 psi  Typical 0.2% Proof Stress 
Elongation at Break  25 %  25 %  Typical 
Reduction of Area  48 %  48 %  Typical 
Modulus of Elasticity  105  120 GPa  15200  17400 ksi  Typical 
Fatigue Strength  116 MPa  16800 psi  Notched, Kt=3.3; limit at 10^7 cycles; rotating bend (sample with UTS = 550 MPa) 
Fatigue Strength  116 MPa  16800 psi  Notched, Kt=4; limit at 10^7 cycles; rotating bend (sample with UTS = 589 MPa) 
Fatigue Strength  123 MPa  17800 psi  Notched, Kt=3; limit at 10^7 cycles; rotating bend (sample with UTS = 589 MPa) 
Fatigue Strength  147 MPa  21300 psi  Notched, Kt=2; limit at 10^7 cycles; rotating bend (sample with UTS = 589 MPa) 
Fatigue Strength  170 MPa  24700 psi  Notched, Kt=2; limit at 10^7 cycles; rotating bend (sample with UTS = 550 MPa) 
Fatigue Strength  247 MPa  35800 psi  Notched, Kt=1.5; limit at 10^7 cycles; rotating bend (sample with UTS = 550 MPa) 
Fatigue Strength  263 MPa  38100 psi  Smooth, Kt=1; limit at 10^7 cycles; rotating bend (sample with UTS = 550 MPa) 
Fatigue Strength  278 MPa  40300 psi  Smooth, Kt=1; limit at 10^7 cycles; rotating bend (sample with UTS = 589 MPa) 
Electrical Properties 

Electrical Resistivity  5.4e005 ohmcm  5.4e005 ohmcm  
Thermal Properties 

CTE, linear 20°C  8.6 µm/m°C  4.78 µin/in°F  20100°C 
CTE, linear 250°C  9.5 µm/m°C  5.28 µin/in°F  20300°C 
CTE, linear 500°C  9.7 µm/m°C  5.39 µin/in°F  20500°C 
Thermal Conductivity  21.79 W/mK  151 BTUin/hrft²°F  
Maximum Service Temperature, Air  425 °C  797 °F  Continuous 
Maximum Service Temperature, Air  540 °C  1000 °F  Intermittant 
Beta Transus  920 °C  1690 °F  
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