Grade 3 titanium is a commercially pure (CP) grade with higher strength than Grades 1 and 2: 450 MPa (65 ksi) minimum tensile strength and 380 MPa (55 ksi) minimum yield.
Chemical composition
Limits for Grade 3 Titanium (UNS R50550) in weight percent: maximums unless shown as a range. Source: ASTM B348 (bar), ASTM B265 (sheet/plate).
| Element | Limit (wt %) |
|---|---|
| Nitrogen (N) | 0.05 |
| Carbon (C) | 0.08 |
| Hydrogen (H) | 0.015 |
| Iron (Fe) | 0.30 |
| Oxygen (O) | 0.35 |
| Other elements | 0.1 each / 0.4 total |
| Titanium (Ti) | Balance |
Mechanical properties
Specified minimum properties for annealed Grade 3 Titanium at room temperature. Source: ASTM B348 (bar), ASTM B265 (sheet/plate). The values for your material are on its mill test certificate.
| Property | Value |
|---|---|
| Ultimate Tensile Strength (min) | 450 MPa (65 ksi) |
| Yield Strength (0.2%, min) | 380 MPa (55 ksi) |
| Elongation (min) | 18 % |
- Minimum properties per ASTM B348 apply to bar up to 3 in (76 mm); larger sections are by agreement.
- Minimum properties per ASTM B265 apply to plate up to 1 in (25 mm) thick; thicker plate is by agreement.
- Density is a typical value, not a specification requirement.
Grade 3 Titanium at a glance
| Supplied by Laube as | Bar, Sheet, Plate |
|---|---|
| ASTM standards | ASTM B348 (bar), ASTM B265 (sheet/plate) |
| Notes | Higher strength than Grade 1 and Grade 2. Corrosion resistant. Lower formability than Grades 1 and 2. |
| Typical uses | Airframe components, chemical processing, pressure vessels, marine |
| Compare | All grades chart |
| Industry pages | Aerospace, Marine & Offshore |
Frequently Asked Questions
How strong is Grade 3 titanium?
ASTM B348 and B265 specify a minimum tensile strength of 450 MPa (65 ksi), a minimum yield strength of 380 MPa (55 ksi) and a minimum elongation of 18%.
