Titanium Alloy, Beta Titanium Alloy, Nonferrous Metal, Welding Wire -- Ti-15Mo-3Nb-3Al-0.2Si
BETA 21S
BETA 21S Ti-15Mo-3Nb-3Al-0.2Si (Ti-15-3-3-0.2) Offers the good cold formability and weldability of a beta strip alloy, but with greatly improved oxidation resistance and creep strength. Aerospace applications include engine exhaust plug and nozzle assemblies. The alloy's resistance to aircraft hydraulic fluids, such as Skydrol, is excellent at all temperatures. It is well suited for metal matrix composites because it can be economically rolled to foil, is compatible with most fibers, and is sufficiently stable up to 816°C.
Typical heat treatment for this alloy: Solution treatment: 816-843°C for 3-30 min, air cool. Age treatment: 510-679°C for 8-16 hrs.
Specifications:
| Typical Chemical Composition (%) |
| Al |
C |
H |
Fe |
Mo |
Nb |
N |
O |
Si |
T |
| 2.5-3.5 |
< =0.050 |
< =0.015 |
< =0.40 |
14.0-16.0 |
2.4-3.2 |
< =0.050 |
0.11-0.17 |
0.15-0.25 |
76.0-80.8 |
| Overaged, Typical Mechanical Properties |
| Density |
Ultimate Tensile Strength |
Yield Tensile Strength |
Elongation at Break |
Modulus of Elasticity |
Electrical Resistivity |
| 4.94 g/cc |
930 MPa |
860 MPa @Strain 0.2% |
14% |
96.0-103 GPa |
0.000135 ohm-cm |
