Titanium Grade 2 (CP) vs Ti-6Al-4V (Grade 5): Same base metal, completely different strength class
Titanium Grade 2 (CP) vs Ti-6Al-4V (Grade 5)
Side-by-side chemical composition and mechanical property comparison.
Overview
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)
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) | Ti-6Al-4V (Grade 5) | |
|---|---|---|
| Material Number | 3.7035 | 3.7164 |
| Category | Titanium | Titanium |
| Standard | ASTM B265 | ASTM B265 |
Chemical composition (wt%)
| Element | Titanium Grade 2 (CP) | Ti-6Al-4V (Grade 5) | Overlap |
|---|---|---|---|
| C | 0–0.08% | 0–0.08% | OK |
| V | — | 3.5–4.5% | — |
| Al | — | 5.5–6.75% | — |
| Ti | — | — | — |
Mechanical properties
| Property | Titanium Grade 2 (CP) | Ti-6Al-4V (Grade 5) | Unit |
|---|---|---|---|
| tensile_strength | ≥ 345 | ≥ 895 | MPa |
| yield_strength | ≥ 275 | ≥ 828 | MPa |
| elongation | ≥ 20 | ≥ 10 | % |
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 Titanium Grade 2 (CP) the same as Ti-6Al-4V (Grade 5)?
Titanium Grade 2 (CP) and Ti-6Al-4V (Grade 5) have a 30% composition overlap. Same base metal, completely different strength class
Can I replace Titanium Grade 2 (CP) with Ti-6Al-4V (Grade 5)?
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 Titanium Grade 2 (CP) and Ti-6Al-4V (Grade 5)?
The main differences are in the following elements: overall alloying content. Titanium Grade 2 (CP) is a Titanium grade, while Ti-6Al-4V (Grade 5) is a Titanium grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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