Titanium Ti-6Al-2Sn-4Zr-2Mo-0.1Si; Duplex Annealed


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

Key Words: Ti-6242Si; Ti-6242S; UNS R54620

Component   Wt. %
Al6 
Mo2 
Si0.08 
Sn2 
Ti86 
Zr4 

Material Notes:
Information provided by Allvac and the references.

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, Brinell318318 Estimated from Rockwell C.
Hardness, Knoop346346 Estimated from Rockwell C.
Hardness, Rockwell C3434 
Hardness, Vickers333333 Estimated from Rockwell C.
Tensile Strength, Ultimate1110 MPa161000 psi 
Tensile Strength, Yield1050 MPa152000 psi 
Elongation at Break13 %13 % 
Reduction of Area30 %30 % 
Compressive Modulus118 GPa17100 ksi 
Notched Tensile Strength1025 MPa149000 psi Kt >17; Average of longitudinal and transverse.
Ultimate Bearing Strength1800 MPa261000 psi e/D = 2.0; varies with thickness; this value is at about 2.4 mm.
Bearing Yield Strength1450 MPa210000 psi e/D = 2.0
Poisson's Ratio0.3250.325 
Charpy Impact36 J26.6 ft-lb V-Notch, oxygen content about 0.1%. Value drops with increasing O content.
Fatigue Strength225 MPa32600 psi 10,000,000 Cycles; Kt = 3
Fatigue Strength320 MPa46400 psi 50,000 Cycles; Kt = 3
Fatigue Strength610 MPa88500 psi 10,000,000 Cycles; A=0.67
Fatigue Strength750 MPa109000 psi 500,000 Cycles; A=0.67
Shear Modulus44.5 GPa6450 ksi Calculated

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

Thermal Properties
CTE, linear 20C7.7 m/m-C4.28 in/in-F 0-100C
CTE, linear 250C7.7 m/m-C4.28 in/in-F at 205C
CTE, linear 500C8.1 m/m-C4.5 in/in-F Average over the range 315-540C
Specific Heat Capacity0.46 J/g-C0.11 BTU/lb-F 
Thermal Conductivity7 W/m-K48.6 BTU-in/hr-ft-F 
Melting PointMax 1705 CMax 3100 F Liquidus
Liquidus1705 C3100 F 
Beta Transus995 C1820 F 

References for this datasheet.


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