Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
Molybdenum Type 364 is a powder-metallurgy TZM alloy — molybdenum with about 0.5% titanium and 0.1% zirconium. This datasheet presents the material within the American (ASTM / ASME / UNS) standard system.
Molybdenum is a refractory metal with a very high melting point, high stiffness, low coefficient of thermal expansion and good thermal and electrical conductivity. Type 364 is produced by powder metallurgy. The titanium and zirconium additions form fine, stable carbides that raise the recrystallisation temperature and creep strength well above those of unalloyed molybdenum, giving TZM roughly twice the high-temperature strength and a recrystallisation temperature about 200–300 °C higher. Like all molybdenum it oxidises rapidly in air above about 500 °C and must be protected or used in vacuum or inert/reducing atmospheres for high-temperature service. The material is covered by ASTM B386/B386M (plate, sheet, strip, foil and ribbon) and ASTM B387/B387M (bar, rod and wire).
Typical applications include high-temperature furnace components, heat shields and boats, electronic and semiconductor supports, glass-melting electrodes, and hot-zone hardware for vacuum furnaces.
| Property | Value | Unit |
|---|---|---|
| Density | 10.22 | g/cm³ |
| Melting point | 2623 | °C |
| Elastic modulus | 320 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 5.0 | µm/m·°C |
| Thermal conductivity (20 °C) | 142 | W/m·K |
| Specific heat (20 °C) | 250 | J/kg·K |
| Structure | Body-centred cubic (BCC) | — |
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Molybdenum | Mo | Balance | — | Base element |
| Titanium | Ti | 0.40 | 0.55 | Carbide former; raises strength, recrystallisation |
| Zirconium | Zr | 0.06 | 0.12 | Carbide former; strength, stability |
| Carbon | C | 0.010 | 0.040 | Forms Ti/Zr carbides |
| Oxygen | O | — | 0.0030 | Interstitial impurity |
| Nitrogen | N | — | 0.0020 | Interstitial impurity |
| Iron | Fe | — | 0.010 | Residual impurity |
Stress-relieved condition, typical values for ASTM B386 Type 364 (TZM).
| Condition | Property | Value |
|---|---|---|
| Stress-relieved | Tensile strength (UTS) | ≥620 MPa (90 ksi) |
| Stress-relieved | 0.2% yield strength | ≥480 MPa (70 ksi) |
| Stress-relieved | Elongation at break | ≥10 % |
| Recrystallised | Tensile strength (UTS) | lower; more ductile |
| — | Elastic modulus | 320 GPa |
Confirm against the mill test report. Properties depend on product form, thickness and metallurgical condition (stress-relieved versus recrystallised).
| Environment | Performance | Notes |
|---|---|---|
| Reducing / inert atmospheres | Excellent | Preferred high-temperature environment |
| Vacuum service | Excellent | Stable; low vapour pressure |
| Many liquid metals / molten glass | Very Good | Widely used for glass-melting |
| Oxidizing atmospheres (air, >500 °C) | Poor | Forms volatile MoO₃; must be protected |
| Mineral acids | Variable | Resists some; attacked by oxidizing acids |
Molybdenum performs excellently in vacuum and reducing or inert atmospheres but oxidises rapidly in air above about 500 °C, forming volatile MoO₃; protective coatings or controlled atmospheres are required for high-temperature air service.
A refractory metal; not hardenable by precipitation. Properties are governed by working and the stress-relieved or recrystallised condition.
Stress Relief Stress relieve below the recrystallisation temperature (for TZM typically about 1100–1300 °C) to retain worked strength while relieving residual stress. Full recrystallisation anneal raises ductility but lowers strength. Perform thermal treatment in vacuum or a protective atmosphere to prevent oxidation.
Welding is difficult; the weld zone recrystallises and the metal is sensitive to embrittlement by interstitials (oxygen, nitrogen, carbon). Electron-beam and gas-tungsten-arc welding under high-purity shielding are used where required.
| Welding Process | Applicability | Notes |
|---|---|---|
| EBW (vacuum) | Acceptable | Preferred; minimises contamination |
| GTAW / TIG | Limited | High-purity inert shielding essential |
| Brazing | Good | Common alternative to fusion welding |
Welds tend to be brittle owing to recrystallisation and interstitial pickup; brazing or mechanical joining is often preferred.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Machinability | Fair; sharp carbide tooling, rigid setups |
| Condition | Stress-relieved for best machining behaviour |
| Coolant | Ample coolant |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Limited; ductile-to-brittle transition above room temperature |
| Hot forming | Warm/hot working above the DBTT; protect from oxidation |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Furnaces / heat treatment | Heat shields, boats, hot-zone hardware | High-temperature strength + low CTE |
| Electronics / semiconductor | Supports, substrates, sputter targets | Conductivity + stability |
| Glass industry | Glass-melting electrodes, stirrers | Resistance to molten glass |
| Lighting / high-temperature | Filaments supports, components | Refractory performance |
| Product Form | ASTM Standard | Notes |
|---|---|---|
| Plate, sheet, strip and foil | ASTM B386 (Type 364) | Powder metallurgy TZM |
| Bar, rod and wire | ASTM B387 (Type 364) | Powder metallurgy TZM |
| Ribbon | ASTM B386 (Type 364) | — |
| Process route | Powder metallurgy (PM) | — |
TZM alloy (Mo-0.5Ti-0.1Zr), powder metallurgy. ASTM B386 / B387 Type 364.
| Type | Composition | Process | Best Used For |
|---|---|---|---|
| Molybdenum Type 360 | Unalloyed Mo | Vacuum arc-cast | General high-temperature molybdenum |
| Molybdenum Type 361 | Unalloyed Mo | Powder metallurgy | Fine-grain unalloyed molybdenum |
| Molybdenum Type 364 | Mo-0.5Ti-0.1Zr (TZM) | Powder metallurgy | Higher-strength, higher-recrystallisation TZM; tooling, hot-work |
| Molybdenum Type 366 | Mo-30W | Vacuum arc-cast | Molten-zinc and high-temperature corrosion service |
| Molybdenum Type 365 | Unalloyed Mo, low carbon | Vacuum arc-cast | Low-carbon unalloyed molybdenum |
+86 021 3355 6635
+86 133 7189 7780
zcalloy1001@gmail.com
Building E265, No. 2, Lane 158, Gangye Road, Xiaokunshan Town, Songjiang District, Shanghai
