Molybdenum’s prime alloy is TZM. It offers twice the strength of pure molybdenum at temperatures up to 1400°C. The recrystallization temperature of TZM is approximately 250°C higher than molybdenum and it offers better weldability.
Nominal Composition in Percent:
Ti 0.5
Zr 0.08
C 0.02
Mo Balance
Density: 10.16 g/cc at 20 °C
Recrystallization Temperature: 1425 to 1595 °C
Stress-Relief Temperature: 1 hour at 1095 to 1260 °C
Liquidus Temperature: 2620 °C
Coefficient of Linear Expansion: 4.9 μm/m ⋅ K at 20 to 40 °C
Elastic Modulus: Tension, 315 GPa (46 × 106 psi) at 20 °C;
205 GPa (30 × 106 psi) at 1095 °C
Typical Tensile Properties of TZM:
| Temperature | Tensile Strength |
Yield Strength at 0.2% Offset |
Elongation in 50 mm |
||
| °C | MPa | ksi | MPa | ksi | % |
| Stress-Relieved Condition: | |||||
| 20 | 965 | 140 | 860 | 125 | 10 |
| 1095 | 490 | 71 | 435 | 63 | — |
| 1650 | 83 | 12 | 62 | 9 | — |
| Recrystallized Material: | |||||
| 20 | 550 | 80 | 380 | 55 | 20 |
| 1095 | 505 | 73 | |||
| 1650 | 369 | 53.5 | — | — | — |
Applications:
- Components for HIP, sintering and heat treatment furnaces
- Metals for rotating anodes for medical diagnostics
- Boats for annealing and sintering processes (temperatures up to 1400 °C)
- Forming tools such as hot runner nozzles for plastic injection moulding
- Moulds for light-alloy casting
- Billets for the isothermal forging