TZM (Titanium Zirconium Molybdenum)
TZM is a molybdenum-based alloy containing 0.5% titanium, 0.08% zirconium, 0.03% carbon, and molybdenum makes up the balance. By combining small amounts of Ti and Zi, TZM moly alloy gains a high recrystallization temperature, making TZM twice as strong as pure molybdenum at 1300°C. The optimal doping percentages are 0.4–0.6% of titanium, 0.07-0.12% of zirconium, and 0.01-0.04% of carbon. CHEMETAL USA has decades of experience in producing TZM material using either powder sintering or vacuum arc-casting.
Precise, Controlled Mixing and Sintering
CHEMETAL applies high-precision standards to ensure the purity and particle size of the powders used to create TZM. Heating temperature and oxygen/hydrogen content are meticulously controlled during vacuum sintering. Outstanding quality control limits cracking, structural looseness, and high outgassing porosity. In addition, carbide strengthening and resistance to thermal shock fatigue are often enhanced. Attention to exacting standards results in the fine, homogenous microstructure and high performance properties for which CHEMETAL products have become known.
Accurate Thermal Forming
CHEMETAL has mastered the fabrication and machining processes made exceedingly difficult by TZM materials’ high ductile-to-brittle transition temperature (remarkably, TZM is brittle at even at room temperature). The TZM forming process must adhere to a strict series of treatments. For example, the TZM plate and sheet must be washed with alkaline detergent after every rolling; stress released annealing is required at multiple rolling steps; and the forging and extruding of TZM rods must be done at strictly controlled forming rates and pressing temperatures.
TZM Rod | |
| Diameter | 0.029″ (0.75mm) – 5″ (127 mm) |
| Length | 0.15″ (3.81mm) – 48″ (1020mm) |
TZM Plate | |
| Thickness | 0.240”(6 mm) to 3.15”(80 mm) |
| Width | Maximum 22″ (558mm) |
| Length | Maximum 80″ (2000mm) |
TZM Sheet | |
| Thickness | 0.004″ (0.1 mm) to 0.240″ (6 mm) |
| Width | Maximum 26″ (660mm) |
| Length | Maximum 80″ (2000mm) |
| Surface | Ground, Chemical Cleaned, As rolled |
| Composition | Ti 0.5 %, Zr 0.08%, C 0.03%, Mo Balance |
| Standard | ASTM B386 ASTM B387 |
As an ISO certified TZM molybdenum products manufacturer, We are capable of offering various types of TZM molybdenum rods, plates and sheets that all meet a consistently high standard that conforms to ASTM B386 and ASTM B387. We have the capacity to provide a fast lead time and handle large-volume contracts. Download PRODUCT CATALOG to learn more about our Molybdenum products.
TZM Alloy Applications
Titanium-Zirconium-Molybdenum (TZM) alloy is an ideal material for many industrial applications requiring high strength, high-temperature processes, including those common in the aerospace, electronics, and thermal treatment industries. TZM is especially advantageous for work in the 700-1400°C range.
For example, TZM’s high creep resistance is particularly suited to heat treating structural components such as shielding and supporting parts; making dies for isothermal forging; non-ferrous and ferrous metals casting, and TZM piercing plugs. Its weldability and high recrystallization temperature make TZM an excellent choice for aerospace applications, including rocket nozzles and hot gas valves.
TZM Alloy Properties
- Creep Resistance
- High Tensile Strength
- Good Machinability
- High Recrystallization Temperature
- Corrosion Resistance
- Good Weldability
TZM has a wide range of valuable properties in high temperature environments, including high strength, creep resistance, hardness, and low vapor pressure. It also displays a low coefficient of expansion; excellent resistance to heat and corrosion; and good machinability. Compared with pure molybdenum, TZM has a more stable crystalline structure and higher recrystallization temperature. This is due to the small amount of zirconium and titanium doped into the molybdenum substrate. With their extremely fine size, the composite carbides Mo2C, TiC, and ZrC also help refine and restrain the crystalline grain of molybdenum, which in turn helps the alloy become more weldable and creep resistant than pure molybdenum.
TZM Molybdenum Mechanical and Physical Properties
TZM Molybdenum Physical Properties | TZM Molybdenum Mechanical Properties | ||
| Density | 0.37 lb/in3 10.22 gm/cm3 | Tensile Strength | 110 (760) ksi (Mpa)-RT |
| Melting Point | 4753 °F 2623 °C | Elongation | 15% in 1.0″. |
| Thermal Conductivity | 0.48 Cal/cm2/cm°C/sec | Hardness | 220 dph |
| Specific Heat | 0.073 Cal/gm/°C | ||
| Coefficient of Linear Thermal Expansion | 2.50 micro-in/°F x 10-6 5.20 micro-in/°C x 10-6 | Modules of Elasticity | 46000 ksi 320 gpa |
| Electrical Resistance | 6.85 micro-ohm-cm | ||
TZM Alloy Composition
| ELEMENT | CONTENT% |
| Ti | 0.4-0.6 |
| Zr | 0.07-0.12 |
| C | 0.01-0.04 |
| S | ≤ 0.006 |
| Fe | ≤ 0.01 |
| Ni | ≤ 0.005 |
| N | ≤ 0.003 |
| Mo | Balance |
Related Articles
- P/M and Arc-casting technologies to Manufacture Molybdenum Titanium Zirconium Alloy
- Recent Progress in Research and Application of Molybdenum Alloys
- Annealing Process of MoTiZr Alloy Bars
- The Similar Physical and Chemical Properties of Pure Molybdenum and Molybdenum Alloys