| Chemical composition (weight %) (Maximum values unless range is shown) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| O | N | C | H | Fe | Al | V | Ni | Mo | Others | Residuals | |
| 0.25 | 0.03 | 0.08 | 0.015 | 0.30 | 0.6–0.9 | 0.2–0.4 | 0.4 | ||||
This alloy is sometimes referred to as “half 6-4”.
It offers 20–50% higher strength than C.P. grades,
but is more formable and weldable than Ti-6Al-4V.
Grade 9 combines strength, weldability and formability.
The alloy has excellent formability plus higher tensile strength
than the strongest unalloyed grade.
| Mechanical properties at room temperature | ||
|---|---|---|
| Minimum values | Typical values | |
| Yield Strength | 345 MPa | 465 MPa |
| Ultimate Strength | 485 MPa | 610 MPa |
| Elongation in 50 mm, A5 | 18% | 22% |
| Reduction in Area | 25% | % |
| Hardness | 170–240 HV | |
| Modulus of elasticity | 103 GPa | |
| Charpy V-Notch Impact | 16–27 J | |