Ti Grade 9 is a near alpha, alpha-beta alloy, sometimes referred to as “half-6-4.” It offers 20 to 50% higher tensile strength than the commercially pure titanium at room and elevated temperatures. It is much more amenable to cold working than Ti 6AI/4V alloy and can be cold worked 75 to 85% to result in
moderately high strength and good ductility
The alloy can be formed from the annealed temper. Severe forming may be aided by an intermediate stress relief. Stress relieving may be appropriate after severe cold forming to remove residual stresses. Weldability and corrosion resistance is very similar to commercially pure titanium. Welding should be performed with inert gas shielded arc or spot welding.Welding with active gases, coatings, or fluxes must be avoided to prevent embrittlement.
Available product forms
Typical manufacturing specifications
- ASTM B265
- AMS 4989
- Also individual customer specifications.
Typical Applications
Mechanical Properties
| Titanium Grade 9 MECHANICAL PROPERTIES |
| Temper |
Annealed |
| Tensile strength Rm |
|
| Yield strength Rp 0.2 |
|
| Elongation A50 |
|
Physical Properties
| Titanium Grade 9 PHYSICAL PROPERTIES (At 20°C) |
| Specific Heat (0-100°C) |
427 |
J/(kg*K) |
| Thermal Conductivity |
7.6 |
W/(m*K) |
| Coef. of Thermal Expansion |
7.9 |
mm/m/°C |
| Modulus of Elasticity |
107
|
GPa
|
| Electrical Resistivity |
12.6
|
µohm/cm |
| Density |
4.48
|
g/cm3 |
Available Dimensions
| AVAILABLE DIMENSIONS (Millimeters) |
| Thickness (mm) |
100mm Wide
|
200mm Wide
|
300mm Wide |
| 0.0015 to 0.012 |
±5% |
- |
-
|
| 0.012 to 0.025 |
±5%
|
±0.0010 |
±0.0013 |
| 0.025 to 0.10 |
±0.0013 |
±0.0015 |
±0.0019
|
| 0.10 to 0.25 |
±0.0025
|
±0.0025 |
±0.0030 |
| 0.25 to 0.50 |
±0.0038
|
±0.0051 |
±0.0064 |
| 0.50 to 1.0 |
±0.0051
|
±0.0089 |
±0.0127 |
Tolerances in percent or mm. Tolerances may vary depending on alloy being rolled..
The table above outline typical thickness tolerances available from HPM, which are tighter than
industry standards.
Chemical Composion
| CHEMICAL COMPOSION (% by weight) |
| Element |
Min |
Max |
| Ti |
Balance |
| Al |
2.5 |
3.5 |
| V |
2.0
|
3.0
|
| C |
-
|
0.08 |
| O |
-
|
0.15 |
| N |
-
|
0.03 |
| H |
-
|
0.015 |
| H |
-
|
0.015 |
| Fe |
-
|
0.25 |
| Others each |
0.1 |
| Others total |
0.4 |