Ti-6246 vs Ti-6242: Why ZYTC Alloy Chooses Ti-6246 for Critical High-Temperature Service
At ZYTC Alloy, we adhere to strict standardized, process-driven, and specialized production and inspection protocols. Every Ti-6246 component we manufacture is subject to comprehensive chemical analysis, mechanical property testing, microstructure examination, and surface quality inspection to ensure full compliance with international specifications.
What is Ti-6246 Titanium Alloy?
Ti-6246 (also designated Ti-6Al-2Sn-4Zr-6Mo, UNS R56260) is a high-performance alpha-beta titanium alloy known for its exceptional strength-to-weight ratio, deep hardenability, and outstanding performance at elevated temperatures. The alloy was metallurgically engineered to deliver massive deep-hardenability and extreme creep resistance for critical structural components.
Ti-6246 offers ultimate tensile strength around 1100 MPa – nearly double that of Ti-6Al-4V – while remaining relatively light with a density of approximately 4.54–4.65 g/cm³. The alloy maintains superior strength at high temperatures up to 538°C (1000°F) and demonstrates excellent corrosion resistance in aggressive environments.
Chemical Composition of Ti-6246
| Element | Composition (wt%) | Standard Reference |
|---|---|---|
| Titanium (Ti) | Balance | AMS 4981 |
| Aluminum (Al) | 5.5 – 6.5 | AMS 4981 |
| Tin (Sn) | 1.75 – 2.25 | AMS 4981 |
| Zirconium (Zr) | 3.5 – 4.5 | AMS 4981 |
| Molybdenum (Mo) | 5.5 – 6.5 | AMS 4981 |
| Iron (Fe) | ≤ 0.15 | AMS 4981 |
| Oxygen (O) | ≤ 0.15 | AMS 4981 |
| Carbon (C) | ≤ 0.04 | AMS 4981 |
| Nitrogen (N) | ≤ 0.04 | AMS 4981 |
| Hydrogen (H) | ≤ 0.0125 | AMS 4981 |
Chemical composition of Ti-6246 per AMS 4981 specification.
Mechanical Properties of Ti-6246
| Property | Value Range | Unit |
|---|---|---|
| 0.2% Proof Stress | 1090 – 1240 | MPa |
| Tensile Strength | 1090 – 1240 | MPa |
| Elongation | 13 – 16 | % |
| Reduction of Area | 37 – 40 | % |
| Hardness, Brinell | ~342 | HB |
| Hardness, Rockwell C | ~37 | HRC |
| Hardness, Vickers | ~358 | HV |
Mechanical properties of Ti-6246 are dependent on condition and heat treatment.
Physical Properties of Ti-6246
| Property | Value | Unit |
|---|---|---|
| Density | 4.54 – 4.65 | g/cm³ |
| Young's Modulus | ~114 – 125 | GPa |
| Maximum Service Temperature | ~538 (1000°F) | °C |
| Beta Transus | ~940 | °C |
Physical characteristics of Ti-6246.
Applications of Ti-6246
Ti-6246 is extensively used in demanding environments across multiple industries:
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Aerospace: Compressor discs, fan blades, impellers, spacers, seals, and airframe components
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Oil & Gas: Downhole tubulars, subsea wellhead components, riser systems, pressure housings, and completion equipment for sour service applications
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High-Performance Motorsport: Lightweight drivetrain components and structural parts
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Industrial Equipment: High-strength forged components requiring temperature resistance up to 460°C
The alloy's outstanding corrosion resistance in hydrogen sulfide (H₂S) and carbon dioxide (CO₂) environments makes it particularly suitable for geothermal and sour well applications.
Ti-6246 vs Ti-6242: Key Differences
| Feature | Ti-6246 | Ti-6242 |
|---|---|---|
| Alloy Designation | Ti-6Al-2Sn-4Zr-6Mo | Ti-6Al-2Sn-4Zr-2Mo-0.08Si |
| UNS Number | R56260 | R54620 |
| Molybdenum Content | 5.5 – 6.5% | 1.8 – 2.2% |
| Alloy Type | Alpha-Beta (near-beta) | Near-Alpha |
| Maximum Service Temp | ~538°C (1000°F) | ~540°C |
| Creep Resistance | Up to ~530°C | Up to ~540°C |
| Heat Treatment Response | Greater response | Moderate response |
| Strength Level | Higher mechanical properties | Lower mechanical properties |
| Primary Standard | AMS 4981 | AMS 4919 |
| Typical Applications | Compressor discs, oil & gas tools | Jet engine compressor components |
Ti-6246 exhibits even higher mechanical properties than Ti-6242 and offers superior creep resistance up to approximately 530°C. The higher molybdenum content in Ti-6246 makes it more of a beta titanium alloy compared to Ti-6242, which is classified as a near-alpha alloy. This gives Ti-6246 a greater response to heat treatment and enhanced deep hardenability in thick cross-sections.
While Ti-6242 demonstrates good creep and fatigue properties up to 540°C and is widely used in jet engine compressors, Ti-6246 is preferred for applications requiring higher strength and superior corrosion resistance in sour service environments.
ZYTC Alloy's Ti-6246 Manufacturing Capabilities
ZYTC Alloy is a professional manufacturer of Ti-6246 products, offering a comprehensive range of forms including:
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Ti-6246 Plates & Sheets
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Ti-6246 Strips & Bars
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Ti-6246 Wires & Tubes
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Ti-6246 Forgings & Rings
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Custom Ti-6246 Components
We welcome drawings for custom machining and strictly implement international standards including ASTM, AISI, ISO, JIS, and AMS. Our Ti-6246 products are manufactured in full compliance with:
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ASTM B265 – Titanium and Titanium Alloy Strip, Sheet, and Plate
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ASTM B381 – Titanium Alloy Forgings
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MIL-T-9047 – Military Specification for Titanium Alloys
Why Choose ZYTC Alloy for Ti-6246?
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Fast Delivery: Competitive lead times for Ti-6246 orders
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Competitive Pricing: Cost-effective Ti-6246 solutions without compromising quality
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Superior Quality: Every Ti-6246 product undergoes 100% inspection including Ultrasonic Testing (AMS 2631), mechanical testing, and MTC 3.1 certification
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Full Traceability: Complete material certification with producer's certificate of origin
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Expert Support: In-house metallurgical expertise for Ti-6246 alloy selection and processing
Contact ZYTC Alloy
For inquiries regarding Ti-6246 titanium products, custom forgings, or technical specifications, please contact ZYTC Alloy today. We are your trusted partner for high-performance Ti-6246 titanium alloy solutions.
