Golden Sunbird Metals is your trusted supplier of molybdenum and molybdenum alloys from China. We offer high-quality molybdenum alloy products at wholesale prices designed to meet industries’ stringent requirements worldwide. Our molybdenum alloy products are used in various industries, including electronics, aerospace, nuclear energy, automotive, medical devices, industrial processes, and chemicals due to their high strength at elevated temperatures, good thermal and electrical conductivity, and corrosion resistance. If you want to purchase molybdenum alloy products in bulk or customized molybdenum alloy products, please email us at [email protected].

FAQs

Molybdenum alloys are materials that combine molybdenum with other elements to enhance certain properties, such as strength, temperature resistance, and corrosion resistance. These alloys are engineered to perform in extreme environments where pure molybdenum would falter due to its limitations. For instance, adding titanium and zirconium increases the alloy’s strength and resistance to high temperatures, making it suitable for aerospace, nuclear energy, and electronics industries.

  • Molybdenum alloys include additional elements for improved performance.
  • They are designed for use in extreme conditions.
  • Key industries include aerospace, nuclear energy, and electronics.

Choosing molybdenum alloys over pure molybdenum hinges on the necessity for enhanced material properties that pure molybdenum cannot offer. Alloys are specifically tailored to withstand higher temperatures, exhibit greater strength, and resist corrosion more effectively than pure molybdenum. For applications like turbine blades in jet engines or components in nuclear reactors, these enhanced properties are not just beneficial; they are critical for safety and performance.

  • Alloys provide superior temperature resistance, strength, and corrosion resistance.
  • Tailored for critical applications requiring enhanced material properties.
  • Essential for industries where safety and performance are paramount.

The most common types of molybdenum alloys include Molybdenum-TZM (Titanium-Zirconium-Molybdenum), Molybdenum-Lanthanum (Mo-La), and Molybdenum-Tungsten (Mo-W) alloys. TZM is renowned for its high strength and resistance to thermal creep deformation, making it ideal for high-temperature applications. Mo-La alloys are distinguished by their enhanced ductility and resistance to oxidation at elevated temperatures, while Mo-W alloys offer superior resistance to corrosion, especially in reducing environments.

  • Molybdenum-TZM is known for high strength and thermal creep resistance.
  • Molybdenum-Lanthanum offers enhanced ductility and oxidation resistance.
  • Molybdenum-Tungsten excels in corrosion resistance.

The manufacturing of molybdenum alloys typically involves powder metallurgy techniques. This process starts with the mixing of molybdenum powder with other elemental powders, according to the desired alloy composition. The mixture is then compressed into a compact shape and sintered at high temperatures to induce fusion between the particles without melting them completely. The result is a solid material that combines the properties of its constituent elements. Subsequent processing steps, such as forging and rolling, can further refine the alloy’s microstructure and improve its mechanical properties.

  • Utilizes powder metallurgy techniques for alloy production.
  • Involves mixing, compressing, and sintering elemental powders.
  • Further processing refines the alloy’s properties.

Molybdenum alloys stand out among high-temperature alloys due to their exceptional strength at elevated temperatures, excellent thermal conductivity, and low thermal expansion coefficient. Compared to nickel-based superalloys, molybdenum alloys can operate at higher temperatures and exhibit superior resistance to thermal creep deformation. This makes them particularly suited for applications in environments where thermal efficiency and dimensional stability under heat are crucial. However, it’s worth noting that in extremely corrosive environments, certain nickel-based alloys might perform better due to their enhanced corrosion resistance.

  • Higher operational temperatures compared to nickel-based superalloys.
  • Superior thermal creep resistance.
  • Excellent thermal conductivity and low thermal expansion.

Welding molybdenum alloys requires specialized techniques due to their high melting points and unique physical properties. Techniques such as electron beam welding, gas tungsten arc welding, and plasma arc welding are commonly employed. These methods allow for precise control over the welding environment, minimizing exposure to oxygen and other contaminants that could adversely affect the weld quality. Pre-weld and post-weld heat treatments are often necessary to prevent cracking and to ensure the structural integrity of the weld. Thus, while welding molybdenum alloys is feasible, it demands technical expertise and careful preparation.

  • Specialized welding techniques are necessary.
  • Electron beam, gas tungsten arc, and plasma arc welding are commonly used.
  • Pre-weld and post-weld heat treatments help ensure weld quality.

Molybdenum (Mo) is a versatile refractory metal valued for its high melting point (2,623°C / 4,753°F), excellent high-temperature strength, thermal conductivity, low thermal expansion, and resistance to most acids and molten metals (except oxidizing environments). The primary commercial designations per ASTM B387 (for bar, rod, and wire; corresponding forms covered under B386 for sheet/plate) are:

  • Mo 360 — Unalloyed vacuum arc-cast (VAC) molybdenum.
  • Mo 361 — Unalloyed powder metallurgy (P/M) molybdenum.
  • Mo Alloy 363 — Vacuum arc-cast molybdenum–0.5% titanium–0.1% zirconium (TZM) alloy.
  • Mo Alloy 364 — Powder metallurgy molybdenum–0.5% titanium–0.1% zirconium (TZM) alloy.
  • Mo 365 — Unalloyed vacuum arc-cast molybdenum, low carbon.
  • Mo Alloy 366 — Vacuum arc-cast molybdenum–30% tungsten (Mo-30W) alloy.

These grades are typically supplied in stress-relieved or recrystallized condition for optimal performance.

Typical compositions (weight %, per ASTM B387):

Grade Mo (Balance) Ti (%) Zr (%) C (%) W (%) O (max %) N (max %) Fe (max %)
Mo 360 ≥99.9 – – 0.030 max – 0.002 0.002 0.01
Mo 361 ≥99.9 – – 0.010 max – 0.007 0.002 0.01
Mo Alloy 363/364 (TZM) ~99.4 0.40–0.55 0.06–0.12 0.010–0.040 – 0.003 0.002 0.01
Mo 365 ≥99.9 – – 0.010 max – 0.002 0.002 0.01
Mo Alloy 366 ~70 – – 0.030 max 29–31 0.0025 0.002 0.01

TZM grades (363/364) rely on fine carbide precipitates (TiC, ZrC) for strengthening. All grades maintain very low interstitial impurities for ductility and high-temperature stability.

  • Melting point: 2,623°C (4,753°F) for pure and TZM grades; Mo-30W slightly higher due to tungsten addition.
  • Density: ~10.2–10.28 g/cm³ (pure Mo and TZM); ~11.5 g/cm³ (Mo-30W).
  • High-temperature performance: Retains strength and creep resistance to >1,400°C; TZM offers ~2× the strength of pure Mo above 1,000°C and higher recrystallization temperature (~1,400°C vs. ~1,000°C for pure).
  • Mechanical (typical annealed or stress-relieved, room temperature):
    • Pure grades (360/361/365): UTS ~620–720 MPa (90–105 ksi), YS ~580–680 MPa, elongation ~10–20%.
    • TZM (363/364): UTS ~760 MPa (110 ksi), YS ~480–690 MPa, elongation ~10–15%.
    • Mo-30W (366): Higher elevated-temperature strength than pure Mo.
  • Other benefits: Excellent thermal conductivity (~138 W/m·K), low coefficient of thermal expansion, good electrical conductivity, and corrosion resistance in non-oxidizing acids, molten metals, and vacuum/inert atmospheres. TZM excels in creep resistance under load.

These grades are chosen for extreme heat, strength-to-weight, and corrosion needs where steels or other refractories fall short:

  • Pure grades (360/361/365): Vacuum furnace components, glass melting electrodes, semiconductor base plates, X-ray targets, lighting filaments, sputtering targets, and general high-temperature hardware.
  • TZM (363/364): High-temperature structural parts (forging dies, hot runner nozzles, isothermal forging billets), rocket nozzles/thrust chambers, X-ray rotating anodes, HIP furnace hardware, and load-bearing components above 1,000°C.
  • Mo-30W (366): Molten zinc corrosion resistance (zinc smelting stirrers, electrodes, plating baths), glass industry stirring tools, high-temperature furnace elements, and sputtering targets for flat-panel displays.

All perform exceptionally in vacuum, hydrogen, or inert atmospheres.

  • Pure grades (360/361/365): Highest ductility and cost-effectiveness; VAC (360/365) for superior purity/uniformity, P/M (361) for finer grain; low-carbon 365 for enhanced formability.
  • TZM (363/364): Dramatically better high-temperature strength, creep resistance, and recrystallization temperature than pure Mo — ideal for mechanical loading at extreme heat; VAC vs. P/M offers process-specific microstructure options.
  • Mo-30W (366): Superior resistance to molten zinc corrosion and enhanced high-temp strength; tungsten addition raises density slightly but improves performance in aggressive metal-contact environments.

TZM and Mo-30W deliver 30–100% better elevated-temperature performance than unalloyed Mo while retaining core refractory benefits.