Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) vs Ti Grade 23: 70% composition overlap. Some similarities but notable differences in alloying elements.
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) vs Ti Grade 23
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 Grade 23
Ti-6Al-4V ELI (Extra Low Interstitials) — the medical-grade version of the most common titanium alloy. Lower O, N, C, Fe limits than Grade 5 for improved fracture toughness, ductility, and biocompatibility. ASTM F136 specifies it for surgical implants. Slightly lower strength than Grade 5 but better fatigue crack growth resistance. Used for orthopedic implants (hip/knee), spinal fixation, dental implants, and cryogenic aerospace applications.
| Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Ti Grade 23 | |
|---|---|---|
| Material Number | 3.7145 | — |
| Category | Titanium | Titanium |
| Standard | AMS 4919 / AMS 4975 | ASTM F136 |
Chemical composition (wt%)
| Element | Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Ti Grade 23 | 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 Grade 23 | Unit |
|---|---|---|---|
| tensile_strength | 940–1110 | 860–930 | MPa |
| yield_strength | 860–1050 | 795–860 | MPa |
| elongation | 13–15 | 10–15 | % |
Compatibility Assessment
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti Grade 23 share some characteristics (70% overlap) but have notable differences. They may be substitutable in some applications but not all. Verify suitability carefully.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) the same as Ti Grade 23?
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti Grade 23 have a 70% composition overlap. For most purposes, they can be considered similar.
Can I replace Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) with Ti Grade 23?
In many cases, yes. The compositions overlap significantly (70%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti Grade 23?
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 Grade 23 is a Titanium grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.