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TIMET TIMETAL® 685 (Ti-6Al-5Zr-0.5Mo-0.25Si) Titanium Alloy

Category Metal , Nonferrous Metal , Titanium Alloy , Alpha/Near Alpha Titanium Alloy
Manufacturer TIMET
Trade Name TIMETAL®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF TIMET TIMETAL® 685 (Ti-6Al-5Zr-0.5Mo-0.25Si) Titanium Alloy.pdf
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Material Notes:
High-Temperature, High-Strength Creep Resistant AlloyIndustry Specifications: Germany Aerospace: 3.7154. France: T-A6ZD. UK Aerospace Specifications BS TA. 43, 44.Features: TIMETAL 685 possesses excellent tensile strength and creep resistance up to 520°C. It is weldable and has good forging characteristics. The alloy may be joined by the processes normally used in the fabrication of titanium, including argon-arc, electron beam and friction welding. Material should be fully heat treated prior to welding, and also given a suitable post-weld treatment. The weld zone of material treated in this way will have similar structure and properties to the parent metal. This alloy was specifically designed for the aero-engine industry. It is nonmagnetic.Typical heat treatment for this alloy: Solution heat treatment: 1050°C for 30 mins, oil quench. Aging heat treatment: 550°C for 24 hours, air cool.Data provided by TIMET.
Physical Properties Metric English Comments
Density 4.45 g/cc
0.161 lb/in³
Typical
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 1030 MPa
149000 psi
Typical
Tensile Strength, Yield 900 MPa

@Strain 0.200 %
131000 psi

@Strain 0.200 %
Typical
Elongation at Break 10 %
10 %
Typical in 5D
Reduction of Area 20 %
20 %
Modulus of Elasticity 125 GPa
18100 ksi
Typical
Notched Tensile Strength 1648 MPa
239000 psi
Kt=3
Poissons Ratio 0.33
0.33
Calculated by MatWeb
Fatigue Strength 440 MPa

@# of Cycles 1.00e+7
63800 psi

@# of Cycles 1.00e+7
alternating direct-stress (zero mean stress)
630 MPa

@# of Cycles 100000
91400 psi

@# of Cycles 100000
alternating direct-stress (zero mean stress)
Fracture Toughness 68.0 MPa-m½
61.9 ksi-in½
K(IC); Typical
Shear Modulus 47.0 GPa
6820 ksi
Charpy Impact 43.0 J

@Diameter 25.0 mm
31.7 ft-lb

@Diameter 0.984 in
rod
Thermal Properties Metric English Comments
CTE, linear 9.50 µm/m-°C

@Temperature 20.0 - 300 °C
5.28 µin/in-°F

@Temperature 68.0 - 572 °F
9.70 µm/m-°C

@Temperature 20.0 - 100 °C
5.39 µin/in-°F

@Temperature 68.0 - 212 °F
10.1 µm/m-°C

@Temperature 20.0 - 500 °C
5.61 µin/in-°F

@Temperature 68.0 - 932 °F
Thermal Conductivity 4.15 W/m-K
28.8 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 520 °C
968 °F
Good creep resistance
Beta Transus 1020 °C
1870 °F
Component Elements Properties Metric English Comments
Aluminum, Al 5.7 - 6.3 %
5.7 - 6.3 %
Carbon, C <= 0.080 %
<= 0.080 %
Iron, Fe <= 0.050 %
<= 0.050 %
Molybdenum, Mo 0.25 - 0.75 %
0.25 - 0.75 %
Nitrogen, N <= 0.030 %
<= 0.030 %
Oxygen, O <= 0.20 %
<= 0.20 %
Silicon, Si 0.015 - 0.35 %
0.015 - 0.35 %
Titanium, Ti 85.8 - 89.5 %
85.8 - 89.5 %
Calculated as remainder
Zirconium, Zr 4.5 - 6.0 %
4.5 - 6.0 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.000167 ohm-cm
0.000167 ohm-cm
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