Ti-6Al-4V (Grade 5) vs Titanium Grade 2 (CP): Same base metal, completely different strength class
Ti-6Al-4V (Grade 5) vs Titanium Grade 2 (CP)
Side-by-side chemical composition and mechanical property comparison.
Overview
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.
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-4V (Grade 5) | Titanium Grade 2 (CP) | |
|---|---|---|
| Material Number | 3.7164 | 3.7035 |
| Category | Titanium | Titanium |
| Standard | ASTM B265 | ASTM B265 |
Chemical composition (wt%)
| Element | Ti-6Al-4V (Grade 5) | Titanium Grade 2 (CP) | Overlap |
|---|---|---|---|
| C | 0–0.08% | 0–0.08% | OK |
| V | 3.5–4.5% | — | — |
| Al | 5.5–6.75% | — | — |
| Ti | — | — | — |
Mechanical properties
| Property | Ti-6Al-4V (Grade 5) | Titanium Grade 2 (CP) | Unit |
|---|---|---|---|
| tensile_strength | ≥ 895 | ≥ 345 | MPa |
| yield_strength | ≥ 828 | ≥ 275 | MPa |
| elongation | ≥ 10 | ≥ 20 | % |
Compatibility Assessment
Ti-6Al-4V has 2.5x higher tensile strength (895 vs 345 MPa) due to Al/V alloying. CP Grade 2 has better corrosion resistance, formability, and weldability. Choose Grade 2 for chemical processing, Grade 5 for aerospace/structural.
Frequently Asked Questions
Is Ti-6Al-4V (Grade 5) the same as Titanium Grade 2 (CP)?
Ti-6Al-4V (Grade 5) and Titanium Grade 2 (CP) have a 30% composition overlap. Same base metal, completely different strength class
Can I replace Ti-6Al-4V (Grade 5) with Titanium Grade 2 (CP)?
Generally not recommended. The compositions differ significantly (30% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Ti-6Al-4V (Grade 5) and Titanium Grade 2 (CP)?
The main differences are in the following elements: overall alloying content. Ti-6Al-4V (Grade 5) is a Titanium grade, while Titanium Grade 2 (CP) 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.