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. % |  | | | Al | 6 | | | Mo | 2 | | | Sn | 2 | | | Ti | 86 | | | Zr | 4 | |
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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 Properties | Metric | English | Comments |
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| Density | 4.54 g/cc | 0.164 lb/in³ | |
Mechanical Properties |
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| Hardness, Brinell | 304 | 304 | Estimated from Rockwell C. |
| Hardness, Knoop | 330 | 330 | Estimated from Rockwell C. |
| Hardness, Rockwell C | 32 | 32 | |
| Hardness, Vickers | 318 | 318 | Estimated from Rockwell C. |
| Tensile Strength, Ultimate | 940 MPa | 136000 psi | |
| Tensile Strength, Yield | 860 MPa | 125000 psi | |
| Elongation at Break | 15 % | 15 % | |
| Modulus of Elasticity | 113.8 GPa | 16500 ksi | |
| Compressive Yield Strength | 1070 MPa | 155000 psi | |
| Notched Tensile Strength | 1170 MPa | 170000 psi | Kt (stress concentration factor) = 3.0 |
| Ultimate Bearing Strength | 2000 MPa | 290000 psi | e/D = 2 |
| Bearing Yield Strength | 1620 MPa | 235000 psi | e/D = 2 |
| Poisson's Ratio | 0.32 | 0.32 | |
| Charpy Impact | 20 J | 14.8 ft-lb | V-notch |
| Fatigue Strength | 280 MPa | 40600 psi | at 1E+7 cycles. Kt (stress concentration factor) = 3.0 |
| Fatigue Strength | 480 MPa | 69600 psi | 1E+7 cycles, Unnotched |
| Shear Modulus | 43.1 GPa | 6250 ksi | Calculated |
| Shear Strength | 660 MPa | 95700 psi | Ultimate shear strength |
Electrical Properties |
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| Electrical Resistivity | 0.00019 ohm-cm | 0.00019 ohm-cm | |
Thermal Properties |
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| CTE, linear 20°C | 7.7 µm/m-°C | 4.28 µin/in-°F | 20-100ºC |
| CTE, linear 250°C | 8.1 µm/m-°C | 4.5 µin/in-°F | Average over the range 20-315ºC |
| CTE, linear 500°C | 8.1 µm/m-°C | 4.5 µin/in-°F | Average over the range 20-540ºC |
| Specific Heat Capacity | 0.46 J/g-°C | 0.11 BTU/lb-°F | |
| Thermal Conductivity | 7.1 W/m-K | 49.3 BTU-in/hr-ft²-°F | |
| Melting Point | Max 1700 °C | Max 3090 °F | Liquidus; Estimated from similar materials |
| Liquidus | 1700 °C | 3090 °F | Estimated from similar materials |
| Beta Transus | 990 °C | 1810 °F | |
References for this datasheet.
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