Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) vs Ti-6Al-4V ELI (Grade 5 ELI): 70% composition overlap. Some similarities but notable differences in alloying elements.
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) vs Ti-6Al-4V ELI (Grade 5 ELI)
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 ELI (Grade 5 ELI)
3.7165
Extra Low Interstitial version of Ti-6Al-4V — the standard titanium for surgical implants. Reduced O, N, C, Fe for improved ductility, fracture toughness, and biocompatibility. Used for hip and knee implants, bone screws, dental implants, spinal fusion devices, and cardiovascular stents. Also called Grade 23.
| Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Ti-6Al-4V ELI (Grade 5 ELI) | |
|---|---|---|
| Material Number | 3.7145 | 3.7165 |
| Category | Titanium | Titanium |
| Standard | AMS 4919 / AMS 4975 | ASTM F136 |
Chemical composition (wt%)
| Element | Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Ti-6Al-4V ELI (Grade 5 ELI) | 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 ELI (Grade 5 ELI) | Unit |
|---|---|---|---|
| tensile_strength | 940–1110 | ≥ 860 | MPa |
| yield_strength | 860–1050 | ≥ 795 | MPa |
| elongation | 13–15 | ≥ 10 | % |
Compatibility Assessment
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti-6Al-4V ELI (Grade 5 ELI) 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-6Al-4V ELI (Grade 5 ELI)?
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti-6Al-4V ELI (Grade 5 ELI) 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-6Al-4V ELI (Grade 5 ELI)?
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-6Al-4V ELI (Grade 5 ELI)?
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 ELI (Grade 5 ELI) is a Titanium grade.
Related Comparisons
View full data for each material:
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.