Grade 9 titanium (Ti-3Al-2.5V) sits between the commercially pure grades and Grade 5: annealed, it has a minimum tensile strength of 620 MPa (90 ksi) and a minimum yield of 483 MPa (70 ksi). It is widely used for aerospace hydraulic tubing and bicycle frame tubing.
Chemical composition
Limits for Grade 9 Titanium (UNS R56320) in weight percent: maximums unless shown as a range. Source: ASTM B348 (bar), ASTM B338 (tube).
| Element | Limit (wt %) |
|---|---|
| Aluminum (Al) | 2.5–3.5 |
| Vanadium (V) | 2.0–3.0 |
| Iron (Fe) | 0.25 |
| Oxygen (O) | 0.15 |
| Carbon (C) | 0.08 |
| Nitrogen (N) | 0.03 |
| Hydrogen (H) | 0.015 |
| Other elements | 0.1 each / 0.4 total |
| Titanium (Ti) | Balance |
Mechanical properties
Specified minimum properties for annealed Grade 9 Titanium at room temperature. Source: ASTM B348 (bar), ASTM B338 (tube). The values for your material are on its mill test certificate.
| Property | Value |
|---|---|
| Ultimate Tensile Strength (min) | 620 MPa (90 ksi) |
| Yield Strength (0.2%, min) | 483 MPa (70 ksi) |
| Elongation (min) | 15 % |
- Minimum properties per ASTM B348 apply to bar up to 3 in (76 mm); larger sections are by agreement.
- Density is a typical value, not a specification requirement.
Grade 9 Titanium at a glance
| Supplied by Laube as | Bar, Tube |
|---|---|
| ASTM standards | ASTM B348 (bar), ASTM B338 (tube) |
| Notes | Strength between the CP grades and Grade 5. Suited to cold working and tube drawing. Widely used for aerospace hydraulic tubing and bicycle frame tubing. |
| Typical uses | Aerospace hydraulic tubing, bicycle frames, pressure tubing |
| Compare | Grade 9 vs Grade 5, All grades chart |
| Industry pages | Aerospace, Bicycle |
Frequently Asked Questions
What is Grade 9 titanium used for?
Aerospace hydraulic tubing, bicycle frame tubing and pressure tubing: it is stronger than commercially pure titanium and easier to cold-work than Grade 5.
What is the difference between Grade 9 and Grade 5 titanium?
Grade 9 (Ti-3Al-2.5V) has less aluminum and vanadium than Grade 5 (Ti-6Al-4V): 2.5–3.5% aluminum and 2.0–3.0% vanadium, against 5.50–6.75% and 3.50–4.50%. Annealed, its minimum tensile strength is 620 MPa (90 ksi) against 895 MPa (130 ksi) for Grade 5.
Does Laube stock Grade 9 titanium tube?
Grade 9 tube is ordered in for you against a purchase order rather than held in stock.
