Grade 1 titanium is the commercially pure (CP) grade with the lowest strength and the highest ductility of the CP grades, and the lowest iron and oxygen limits. Its minimum tensile strength is 240 MPa (35 ksi).
Chemical composition
Limits for Grade 1 Titanium (UNS R50250) in weight percent: maximums unless shown as a range. Source: ASTM B348 (bar), ASTM B265 (sheet/plate), ASTM B338 (tube).
| Element | Limit (wt %) |
|---|---|
| Nitrogen (N) | 0.03 |
| Carbon (C) | 0.08 |
| Hydrogen (H) | 0.015 |
| Iron (Fe) | 0.20 |
| Oxygen (O) | 0.18 |
| Other elements | 0.1 each / 0.4 total |
| Titanium (Ti) | Balance |
Mechanical properties
Specified minimum properties for annealed Grade 1 Titanium at room temperature. Source: ASTM B348 (bar), ASTM B265 (sheet/plate), ASTM B338 (tube). The values for your material are on its mill test certificate.
| Property | Value |
|---|---|
| Ultimate Tensile Strength (min) | 240 MPa (35 ksi) |
| Yield Strength (0.2%, min) | 138 MPa (20 ksi) |
| Elongation (min) | 24 % |
- 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 1 Titanium at a glance
| Supplied by Laube as | Bar, Tube, Sheet, Plate |
|---|---|
| ASTM standards | ASTM B348 (bar), ASTM B265 (sheet/plate), ASTM B338 (tube) |
| Notes | Lowest strength and highest ductility of the CP grades. Lowest iron (0.20%) and oxygen (0.18%) limits of the CP grades. Readily weldable. |
| Typical uses | Chemical processing equipment, desalination |
| Compare | All grades chart |
| Industry pages | Marine & Offshore, Medical & Orthopedic |
Frequently Asked Questions
Is Grade 1 titanium stronger than Grade 2?
No. Grade 1 has a minimum tensile strength of 240 MPa (35 ksi); Grade 2 has 345 MPa (50 ksi). Grade 1 has the higher minimum elongation: 24% against 20%.
Which ASTM standards cover Grade 1 titanium?
ASTM B348 for bar, ASTM B265 for sheet and plate, and ASTM B338 for tube.
