Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) vs Titanium Grade 2 (CP): 51% composition overlap. Moderate differences, generally not direct substitutes.
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) vs Titanium Grade 2 (CP)
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.
Titanium Grade 2 (CP)
3.7035
The workhorse commercially pure titanium grade. Best balance of strength, ductility, and corrosion resistance among CP grades. Excellent resistance to seawater, chlorides, and oxidizing acids. Used for heat exchangers, chemical processing, marine hardware, desalination, and medical implants.
| Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Titanium Grade 2 (CP) | |
|---|---|---|
| Material Number | 3.7145 | 3.7035 |
| Category | Titanium | Titanium |
| Standard | AMS 4919 / AMS 4975 | ASTM B265 |
Chemical composition (wt%)
| Element | Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Titanium Grade 2 (CP) | Overlap |
|---|---|---|---|
| C | ≤ 0.05% | 0–0.08% | OK |
| Si | 0.06–0.1% | — | — |
| Mo | 1.8–2.2% | — | — |
| Al | 5.5–6.5% | — | — |
Mechanical properties
| Property | Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) | Titanium Grade 2 (CP) | Unit |
|---|---|---|---|
| tensile_strength | 940–1110 | ≥ 345 | MPa |
| yield_strength | 860–1050 | ≥ 275 | MPa |
| elongation | 13–15 | ≥ 20 | % |
Compatibility Assessment
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Titanium Grade 2 (CP) have moderate differences (51% 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 Titanium Grade 2 (CP)?
Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Titanium Grade 2 (CP) have a 51% composition overlap. They are generally not directly interchangeable.
Can I replace Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) with Titanium Grade 2 (CP)?
Generally not recommended. The compositions differ significantly (51% 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 Titanium Grade 2 (CP)?
The main differences are in the following elements: overall alloying content. Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) is a Titanium grade, while Titanium Grade 2 (CP) is a Titanium grade.
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