Molybdenum alloy (TZM) Piercing Mandrel for seamless steel tube producing TZM Chemical composition:
| Main and minor components | Min.content(%) |
| Mo | Balance |
| Ti | 1.0-2.0% |
| Zr | 0.1-0.5% |
| C | 0.1-0.5% |
| Impurities | Max.values (%) |
| Al | 0.002 |
| Fe | 0.006 |
| Ca | 0.002 |
| Ni | 0.003 |
| Si | 0.003 |
| Mg | 0.002 |
| P | 0.001 |
TZM piercing mandrel diameter:15-350 mm，length:20-500 mm.
We could produce TZM piercing mandrel according your requirements and drawing.
Physical properties of TZM piercing mandrel:
Density≥9.8g/cm3
Hardness: HRC 25-29
Thermal conductivity (500ºC) [W/m K] : 127
Coefficient of thermal expansion αth (500ºC) [10-6 K-1] : 5.5
Modulus of elasticity [GPa] : 320
The physical properties of TZM differ very little from those of pure molybdenum. But small quantities of extremely fine carbides make TZM more resilient than pure molybdenum and give it a higher recrystallization temperature and greater creep resistance.