Ti-8Al-1Mo-1V is a near-alpha titanium alloy specifically formulated for exceptional creep resistance at service temperatures up to 450°C (840°F). With the highest tensile modulus-to-density ratio among commercial titanium alloys, this alloy delivers an excellent combination of high strength, creep resistance, and toughness for critical rotating components in gas turbine engines .
1. Product Specifications & Physical DataZYTC Alloy supplies UNS R54810 in mill forms for aerospace applications requiring verified high-temperature properties and complete material traceability. Available Forms: Sheet, strip, plate, bar, billet, extrusions, rings, and forgings . Specifications: AMS 4915 (sheet/strip/plate, single annealed), AMS 4916 (sheet/strip/plate, duplex annealed), AMS 4972 (bar/wire/rings), AMS 4933 (extrusions/rings), AMS 4955 (weld wire) .
| Chemical Composition (Weight %) | Ti-8Al-1Mo-1V Specification |
|---|
| Aluminum (Al) | 7.35 - 8.35 | | Molybdenum (Mo) | 0.75 - 1.25 | | Vanadium (V) | 0.75 - 1.25 | | Iron (Fe) | 0.30 max. | | Oxygen (O) | 0.12 - 0.15 max. | | Carbon (C) | 0.08 max. | | Nitrogen (N) | 0.05 max. | | Hydrogen (H) | 0.0125 - 0.015 max. | | Titanium (Ti) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 4.37 g/cm³ | 0.158 lb/in³ | | Melting Range | 1538°C max | 2800°F max | | Beta Transus | 1038 - 1040°C | 1900 - 1904°F | | Modulus of Elasticity | 117 - 124 GPa | 17.0 - 18.0 × 10⁶ psi | | Poisson's Ratio | 0.32 | 0.32 | | Thermal Conductivity | 6.0 - 6.5 W/m·K | 41.6 - 45 BTU·in/hr·ft²·°F |
| Mechanical Properties (Annealed) | Metric | Imperial |
|---|
| Tensile Strength (min.) | 895 MPa | 130 ksi | | Tensile Strength (typical) | 1021 MPa | 148 ksi | | Yield Strength (min., 0.2% offset) | 828 MPa | 120 ksi | | Yield Strength (typical) | 924 MPa | 134 ksi | | Elongation (min.) | 10% | 10% | | Elongation (typical) | 19% | 19% | | Reduction of Area (min.) | 20% | 20% | | Fracture Toughness (K₁c) | 82 MPa√m | 74.6 ksi√in | | Hardness (Rockwell C) | 35 - 36 | 35 - 36 |
2. Fabrication & Material ComparisonTi-8Al-1Mo-1V requires specific processing parameters due to its near-alpha structure and intended application in rotating hardware. Annealing Treatments : Single Anneal: 788°C (1450°F) × 8 hours, furnace cool Duplex Anneal: 788°C (1450°F) × 1 hour, air cool + second step as required Stress Relief: 593-649°C (1100-1200°F) × 1 hour, air cool
Hot Working/Forging: Rough forge 1010-1038°C (1850-1900°F), finish at 1010°C (1850°F); maintain temperature control to avoid exceeding beta transus . Cold Working: Similar to austenitic stainless steel; post-work annealing recommended to restore properties . Forming: Can be shaped using hydropress, stretch, and drop-hammer techniques in both hot and cold conditions . Machining: Higher modulus increases cutting forces; requires rigid setups, sharp tools, and adequate coolant. Welding: Fair weldability; requires strict adherence to qualified procedures; filler metal per AMS 4955 . Material Comparison: vs. Ti-6Al-4V: Superior creep resistance above 400°C; higher modulus-to-density ratio; lower ductility; more difficult to fabricate . vs. Ti-5Al-2.5Sn: Higher strength and modulus; similar near-alpha characteristics; better elevated-temperature performance. vs. Ti-6Al-2Sn-4Zr-2Mo: Lower alloy content; similar application space in intermediate-temperature compressor components.
3. Applications Jet Engine Components: Forged fan blades, compressor blades, compressor discs, spacers Airframe: High-strength structural parts requiring stiffness and elevated-temperature capability Industrial: Seals, rings, and high-stress components operating at intermediate temperatures
Contact ZYTC Alloy for certified Titanium 8Al-1Mo-1V materials with complete traceability, AMS specifications, technical datasheets, and competitive pricing on standard sizes or custom-forged components. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
