Ti-6Al-2Sn-4Zr-2Mo-Si is a near-alpha titanium alloy specifically engineered for elevated-temperature service up to 550°C (1022°F). With a balanced composition of aluminum, tin, zirconium, molybdenum, and silicon, it offers excellent mechanical strength, superior creep resistance, and good thermal stability—significantly outperforming standard Ti-6Al-4V in high-temperature environments. This alloy is widely used in high-performance racing engine components, exhaust systems, and fasteners requiring long-term reliability at elevated temperatures .
1. Product Specifications & Physical DataZYTC Alloy supplies Ti-6242 in mill forms for aerospace, motorsport, and industrial applications requiring verified high-temperature properties. Available Forms: Round bar, sheet, and plate . Specifications: ASTM B265, AMS 4919, AMS 4975, UNS R54620 .
| Chemical Composition (Weight %) | Ti-6242 Specification |
|---|
| Aluminum (Al) | 5.5 - 6.5 | | Tin (Sn) | 1.8 - 2.2 | | Zirconium (Zr) | 3.6 - 4.4 | | Molybdenum (Mo) | 1.8 - 2.2 | | Silicon (Si) | 0.20 - 0.30 | | Iron (Fe) | 0.15 max. | | Oxygen (O) | 0.12 max. | | Carbon (C) | 0.05 max. | | Nitrogen (N) | 0.03 max. | | Hydrogen (H) | 0.0125 max. | | Titanium (Ti) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 4.54 g/cm³ | 0.164 lb/in³ | | Beta Transus | 995°C ± 15°C | 1825°F ± 25°F | | Modulus of Elasticity (RT) | 110 GPa | 16.0 × 10⁶ psi | | Thermal Conductivity (RT) | 7.1 W/m·K | 49 BTU·in/hr·ft²·°F |
| Mechanical Properties (Annealed) | Temperature | Metric | Imperial |
|---|
| Tensile Strength (min.) | RT | 930 MPa | 135 ksi | | Yield Strength (min., 0.2% offset) | RT | 825 MPa | 120 ksi | | Elongation (min.) | RT | 10% | 10% | | Tensile Strength | 540°C (1000°F) | 620 MPa | 90 ksi | | Yield Strength | 540°C | 450 MPa | 65 ksi | | Elongation | 540°C | 18% | 18% |
2. Fabrication & Material ComparisonHeat Treatment: Solution treat at 980-1020°C (1800-1870°F), air cool or water quench; age at 595-675°C (1100-1250°F) for 2-8 hours, air cool . Hot Working: Forge at 980-1020°C (1800-1870°F); avoid working below 870°C to maintain properties . Cold Working: Limited formability; typically formed at elevated temperatures . Machining: Requires sharp tools, positive rake angles, and adequate coolant; work-hardening tendency similar to Ti-6Al-4V . Welding: Fair weldability using GTAW with inert gas shielding; post-weld heat treatment required to restore properties; careful parameter control essential . Material Comparison: vs. Ti-6Al-4V (Grade 5): Superior creep resistance and thermal stability at elevated temperatures; higher cost; specified for applications above 400°C . vs. Ti-5Al-2.5Sn (Grade 6): Higher strength and creep resistance; similar near-alpha structure . vs. Ti-6Al-2Sn-4Zr-6Mo: Similar alloy family; 6242 offers better creep resistance; 6246 offers higher strength at lower temperatures . vs. 304 Stainless: Half the density with comparable elevated-temperature strength; significantly lighter weight for high-temperature components .
3. ApplicationsHigh-Performance Racing: Engine parts, connecting rods, valves, valve retainers Exhaust Components: Exhaust valves, turbocharger hardware, exhaust manifolds Aerospace: Gas turbine engine components, compressor discs, casings Fasteners: High-temperature bolts, nuts, studs Industrial: Components requiring high-temperature stability and corrosion resistance
Contact ZYTC Alloy for certified Ti-6242 materials with complete traceability, AMS specifications, technical datasheets, and competitive pricing on standard bar, sheet, and plate sizes. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
