Titanium Ti-6Al-2Sn-4Zr-2Mo (Ti-6-2-4-2), Duplex Annealed


Subcategory: Alpha/Near Alpha Titanium Alloy; Metal; Nonferrous Metal; Titanium Alloy

Close Analogs: 1 other heat treatment of this alloy is in Matweb.

Key Words: Ti6Al2Sn4Zr2Mo, Ti-6242; Ti-6-2-4-2; UNS R54620

Component   Wt. %
Al6 
Mo2 
Sn2 
Ti86 
Zr4 

Material Notes:
Alpha Alloy. Silicon is often added to improve creep resistance (See Ti-6242S).

Applications: High-temp jet engines. Blades, discs, spacers, seals. High performance automotive valves.

Physical PropertiesMetricEnglishComments
Density4.54 g/cc0.164 lb/in 

Mechanical Properties
Hardness, Brinell304304 Estimated from Rockwell C.
Hardness, Knoop330330 Estimated from Rockwell C.
Hardness, Rockwell C3232 
Hardness, Vickers318318 Estimated from Rockwell C.
Tensile Strength, Ultimate940 MPa136000 psi 
Tensile Strength, Yield860 MPa125000 psi 
Elongation at Break15 %15 % 
Modulus of Elasticity113.8 GPa16500 ksi 
Compressive Yield Strength1070 MPa155000 psi 
Notched Tensile Strength1170 MPa170000 psi Kt (stress concentration factor) = 3.0
Ultimate Bearing Strength2000 MPa290000 psi e/D = 2
Bearing Yield Strength1620 MPa235000 psi e/D = 2
Poisson's Ratio0.320.32 
Charpy Impact20 J14.8 ft-lb V-notch
Fatigue Strength280 MPa40600 psi at 1E+7 cycles. Kt (stress concentration factor) = 3.0
Fatigue Strength480 MPa69600 psi 1E+7 cycles, Unnotched
Shear Modulus43.1 GPa6250 ksi Calculated
Shear Strength660 MPa95700 psi Ultimate shear strength

Electrical Properties
Electrical Resistivity0.00019 ohm-cm0.00019 ohm-cm 

Thermal Properties
CTE, linear 20C7.7 m/m-C4.28 in/in-F 20-100C
CTE, linear 250C8.1 m/m-C4.5 in/in-F Average over the range 20-315C
CTE, linear 500C8.1 m/m-C4.5 in/in-F Average over the range 20-540C
Specific Heat Capacity0.46 J/g-C0.11 BTU/lb-F 
Thermal Conductivity7.1 W/m-K49.3 BTU-in/hr-ft-F 
Melting PointMax 1700 CMax 3090 F Liquidus; Estimated from similar materials
Liquidus1700 C3090 F Estimated from similar materials
Beta Transus990 C1810 F 

References for this datasheet.


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