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Specialty Compounds RTP Company

TIMET TIMETAL® 679 (Ti-11Sn-5Zr-2.25Al-1Mo-0.2Si) Titanium Alloy; Oil Quenched & Aged
Categories: Metal; Nonferrous Metal; Titanium Alloy; Alpha/Beta Titanium Alloy
Material Notes: High-Temperature, High-Strength Creep Resistant Alloy

Industry Specifications: USA Aerospace: AMS 4974.

TIMETAL 679 has excellent tensile strength and is creep resistant up to 450°C. It is a three-phase alloy at room temperature, having an alpha + beta + compound field and a maximum processing temperature of 925°C is recommended. It is nonmagnetic.

Typical heat treatment for this alloy: Solution heat treatment: 900°C for 30 min. Aging heat treatment: 500°C for 24 hrs, air cool.

Data provided by TIMET.
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Physical PropertiesMetricEnglishComments
Density 4.84 g/cc0.175 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate  899 MPa
@Temperature 450 °C		130000 psi
@Temperature 842 °F
 932 MPa
@Temperature 400 °C		135000 psi
@Temperature 752 °F
 986 MPa
@Temperature 300 °C		143000 psi
@Temperature 572 °F
 1021 MPa
@Temperature 200 °C		148100 psi
@Temperature 392 °F
 >= 1110 MPa
@Temperature 20.0 °C		>= 161000 psi
@Temperature 68.0 °F
 1118 MPa
@Temperature 100 °C		162200 psi
@Temperature 212 °F
Tensile Strength, Yield  688 MPa
@Strain 0.2 %,
Temperature 450 °C		99800 psi
@Strain 0.2 %,
Temperature 842 °F
 701 MPa
@Strain 0.2 %,
Temperature 400 °C		102000 psi
@Strain 0.2 %,
Temperature 752 °F
 738 MPa
@Strain 0.2 %,
Temperature 300 °C		107000 psi
@Strain 0.2 %,
Temperature 572 °F
 819 MPa
@Strain 0.2 %,
Temperature 200 °C		119000 psi
@Strain 0.2 %,
Temperature 392 °F
 940 MPa
@Strain 0.2 %,
Temperature 100 °C		136000 psi
@Strain 0.2 %,
Temperature 212 °F
 >= 970 MPa
@Strain 0.2 %,
Temperature 20.0 °C		>= 141000 psi
@Strain 0.2 %,
Temperature 68.0 °F
Elongation at Break  >= 8.0 %
@Temperature 20.0 °C		>= 8.0 %
@Temperature 68.0 °F		in 5D
 14 %
@Temperature 100 °C		14 %
@Temperature 212 °F		in 5D
 14 %
@Temperature 300 °C		14 %
@Temperature 572 °F		in 5D
 14 %
@Temperature 400 °C		14 %
@Temperature 752 °F		in 5D
 14 %
@Temperature 450 °C		14 %
@Temperature 842 °F		in 5D
 15 %
@Temperature 200 °C		15 %
@Temperature 392 °F		in 5D
Reduction of Area  >= 25 %
@Temperature 20.0 °C		>= 25 %
@Temperature 68.0 °F
 43 %
@Temperature 100 °C		43 %
@Temperature 212 °F
 45 %
@Temperature 450 °C		45 %
@Temperature 842 °F
 46 %
@Temperature 200 °C		46 %
@Temperature 392 °F
 46 %
@Temperature 300 °C		46 %
@Temperature 572 °F
 46 %
@Temperature 400 °C		46 %
@Temperature 752 °F
Modulus of Elasticity 107 GPa15500 ksiTypical
Notched Tensile Strength >= 1480 MPa>= 215000 psi
Shear Modulus 46.0 GPa6670 ksi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.000160 ohm-cm0.000160 ohm-cm
 
Thermal PropertiesMetricEnglishComments
CTE, linear 8.30 µm/m-°C
@Temperature 20.0 °C		4.61 µin/in-°F
@Temperature 68.0 °F
Thermal Conductivity 8.30 W/m-K57.6 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 450 °C842 °FCreep Resistance Maintained
Beta Transus 950 °C1740 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 2.0 - 2.5 %2.0 - 2.5 %
Hydrogen, H <= 0.0125 %<= 0.0125 %
Iron, Fe <= 0.20 %<= 0.20 %
Molybdenum, Mo 0.80 - 1.2 %0.80 - 1.2 %
Oxygen, O <= 0.20 %<= 0.20 %
Silicon, Si 0.10 - 0.50 %0.10 - 0.50 %
Tin, Sn 10.5 - 11.5 %10.5 - 11.5 %
Titanium, Ti 77.9 - 82.6 %77.9 - 82.6 %Calculated as remainder
Zirconium, Zr 4.0 - 6.0 %4.0 - 6.0 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NTIME679 / 19336




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