Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) vs Ti-6Al-4V (Grade 5): 60% composition overlap. Moderate differences, generally not direct substitutes.
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) vs Ti-6Al-4V (Grade 5)
Side-by-side chemical composition and mechanical property comparison.
Overview
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S)
3.7145
Near-alpha high-temperature titanium alloy with silicon addition for creep resistance. UNS R54620. Rm 940–1110 MPa, Rp0.2 860–1050 MPa, A 13–15%. Density 4.54 g/cm³, E-Modul 114–118 GPa. Excellent creep strength and thermal stability to 540°C. AMS 4919/4975/4976. Applications: gas turbine compressor blades and discs, impellers, afterburner structures, hot airframe skin. Boeing 787, GE/P&W engines.
Ti-6Al-4V (Grade 5)
3.7164
The most widely used titanium alloy — accounts for ~50% of all titanium production. Alpha-beta alloy with exceptional strength-to-weight ratio. Used for jet engine components, airframe structures, medical implants (hip/knee), fasteners, and racing components. Biocompatible.
| Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Ti-6Al-4V (Grade 5) | |
|---|---|---|
| Material Number | 3.7145 | 3.7164 |
| Category | Titanium | Titanium |
| Standard | AMS 4919 / AMS 4975 | ASTM B265 |
Chemical composition (wt%)
| Element | Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Ti-6Al-4V (Grade 5) | Overlap |
|---|---|---|---|
| C | ≤ 0.05% | 0–0.08% | OK |
| Si | 0.06–0.1% | — | — |
| Mo | 1.8–2.2% | — | — |
| V | — | 3.5–4.5% | — |
Mechanical properties
| Property | Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Ti-6Al-4V (Grade 5) | Unit |
|---|---|---|---|
| tensile_strength | 940–1110 | ≥ 895 | MPa |
| yield_strength | 860–1050 | ≥ 828 | MPa |
| elongation | 13–15 | ≥ 10 | % |
Compatibility Assessment
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti-6Al-4V (Grade 5) have moderate differences (60% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) the same as Ti-6Al-4V (Grade 5)?
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti-6Al-4V (Grade 5) have a 60% composition overlap. They are generally not directly interchangeable.
Can I replace Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) with Ti-6Al-4V (Grade 5)?
Generally not recommended. The compositions differ significantly (60% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti-6Al-4V (Grade 5)?
The main differences are in the following elements: overall alloying content. Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) is a Titanium grade, while Ti-6Al-4V (Grade 5) is a Titanium grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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