Titanium Grade 2: Commercially Pure CP Ti for Corrosion Service vs Ti-6Al-4V (Grade 5): The Workhorse Titanium Alloy
Side-by-side engineering comparison of Titanium Grade 2: Commercially Pure CP Ti for Corrosion Service (ASTM B265/B348) and Ti-6Al-4V (Grade 5): The Workhorse Titanium Alloy (ASTM B265/B348 / AMS 4911). Compare mechanical properties, chemical composition, density, yield strength, international equivalents, and typical applications to select the right material for your project.
Quick Verdict
Titanium Grade 2 (CP Ti) offers 275 MPa yield with superior formability, weldability, and corrosion immunity in seawater and chemical environments — standard for heat exchangers, chemical processing equipment, and marine components. Ti-6Al-4V (Grade 5) delivers 880 MPa yield — 3.2× Grade 2's strength — with good corrosion resistance, making it the standard for aerospace structural components, medical implants, and high-performance automotive. Grade 5 costs 30-40% more than Grade 2.
Formability, weldability, and corrosion resistance for chemical processing
3.2× higher strength for aerospace and medical implant applications
Quick Comparison
| Property | Titanium Grade 2: Commerc | Ti-6Al-4V (Grade 5): The |
|---|---|---|
| Standard | ASTM B265/B348 | ASTM B265/B348 / AMS 4911 |
| Category | Titanium Alloy | Titanium Alloy |
| Density | 4.51 g/cm³ | 4.43 g/cm³ |
| Yield Strength | 275 MPa (40 ksi) annealed | 880 MPa (128 ksi) annealed |
| Tensile Strength | 345 MPa (50 ksi) annealed | 950 MPa (138 ksi) annealed |
| Key Applications | Titanium Grade 2 is commercially pure (unalloyed) titanium with 99.2% minimum Ti content. It provides the best combinati... | <a href="https://ykwiki.com/materials/ti-6al-4v/">Ti-6Al-4V</a> (Grade 5) accounts for over 50% of global titanium usage... |
International Equivalents
| Titanium Grade 2: Co Equivalents | Ti-6Al-4V (Grade 5): Equivalents |
|---|---|
| EN 3.7035 | EN 3.7165 |
| BT1-0 | BT6 |
| JIS TP340 | JIS TAP6400 |
| TA2 | TC4 |
| ISO Ti Grade 2 | ISO Ti-6Al-4V |
How to Choose
| Choose Titanium Grade 2: Commerc when... | Titanium Grade 2 (CP Ti) offers 275 MPa yield with superior formability, weldability, and corrosion immunity in seawater and chemical environments — standard for heat exchangers, chemical processing equipment, and marine components. |
| Choose Ti-6Al-4V (Grade 5): The when... | Ti-6Al-4V (Grade 5) delivers 880 MPa yield — 3.2× Grade 2's strength — with good corrosion resistance, making it the standard for aerospace structural components, medical implants, and high-performance automotive. |
Decision Checklist: Which Is Right for You?
| Criterion | Titanium Grade 2: Co | Ti-6Al-4V (Grade 5): |
|---|---|---|
| Formability, Weldability, And Corrosion Resistance For Chemical Processing | ✓ | |
| 3.2× Higher Strength For Aerospace And Medical Implant Applications | ✓ | |
| Higher yield strength | ✓ |
Frequently Asked Questions
What is the main difference between Titanium Grade 2: Commercially and Ti-6Al-4V (Grade 5): The Workh?
Titanium Grade 2: Commercially Pure CP Ti for Corrosion Service (ASTM B265/B348) provides 275 MPa (40 ksi) annealed yield strength at 4.51 g/cm³ density, while Ti-6Al-4V (Grade 5): The Workhorse Titanium Alloy (ASTM B265/B348 / AMS 4911) delivers 880 MPa (128 ksi) annealed at 4.43 g/cm³. The choice depends on whether your application prioritizes formability, weldability, and corrosion resistance for chemical processing or 3.2× higher strength for aerospace and medical implant applications.
Can Titanium Grade 2: Commercially be substituted for Ti-6Al-4V (Grade 5): The Workh?
In many applications, these materials can be cross-referenced, but direct substitution should always be verified against specific project specifications, especially for formability, weldability, and corrosion resistance for chemical processing, 3.2× higher strength for aerospace and medical implant applications, and operating environment. Consult your engineer of record.