Molybdenum &

Molybdenum Alloys

Pure molybdenum in wrought form — rod, bar, sheet, plate, and foil — is produced by powder metallurgy pressing and sintering followed by hot working. Like tungsten, molybdenum cannot be conventionally melted and cast. Mo-1 grade (≥99.95% Mo) is the standard specification for high-purity industrial applications including vacuum furnace hot zone components (heating elements, radiation shielding, hearth rails), glass melting electrodes, electron beam evaporation sources, and precision scientific instruments. Its low vapor pressure at elevated temperatures, excellent thermal conductivity, and superior high-temperature strength make it irreplaceable in vacuum and inert atmosphere processing equipment. Surplus pure molybdenum rod and sheet from closed furnace operations, equipment upgrades, and semiconductor tool OEM changes is actively traded.

TZM is the most important structural molybdenum alloy, combining the base properties of pure molybdenum with dramatically enhanced high-temperature strength through the addition of 0.5% titanium and 0.08% zirconium, which form stable carbide and oxide dispersoids that pin grain boundaries and inhibit recrystallization. At room temperature, TZM offers similar strength to pure molybdenum. Above 900°C — the recrystallization temperature of pure Mo — TZM maintains significantly higher strength. Above 1,300°C, TZM is twice as strong as pure molybdenum. This makes it the material of choice for rocket nozzle inserts, hot pressing dies, forging dies for superalloy production, high-temperature structural supports in vacuum furnaces, and plasma-facing components in nuclear fusion research. TZM is produced by either powder metallurgy (P/M) or arc casting, with P/M being the dominant process.

Lanthanum oxide-doped molybdenum (Mo-La, also marketed as MoLa or the ML-series) is an oxide dispersion-strengthened (ODS) refractory metal that extends the effective service temperature of molybdenum beyond TZM's practical limit. The fine, stable La₂O₃ dispersoids resist coarsening even at extreme temperatures, providing superior creep strength and preventing the softening that limits pure Mo and TZM at the highest operating temperatures. Mo-La is the preferred choice for semiconductor ion implantation source components and aperture plates, glass fiber spinning bushings that operate continuously at temperatures above 1,200°C in contact with molten glass, and ultra-high-temperature furnace hardware requiring dimensional stability well above the recrystallization point of TZM. Surplus Mo-La from semiconductor fab equipment upgrades and glass industry plant rebuilds finds a small but active and highly specialized buyer base.

Ferromolybdenum is the dominant commercial form of molybdenum, representing approximately 80% of all molybdenum consumed globally. Produced by reducing molybdenum trioxide with iron and aluminum via the aluminothermic process, standard ferromolybdenum contains 60–70% molybdenum with iron as the balance. It is the primary vehicle for introducing molybdenum into steel electric arc furnaces and ladle metallurgy stations. Molybdenum in steel — typically 0.1% to 3% — improves hardenability, strength at elevated temperatures, pitting corrosion resistance (critical in 316 stainless), and creep strength in pressure vessel and high-temperature structural steels. Surplus FeMo from steel mill inventory reductions, reformulated melt schedules, and trading company position liquidations is the highest-volume molybdenum secondary market product by weight that we handle.

Molybdenum sputtering targets are among the highest-volume thin film deposition materials in the semiconductor and flat panel display industries. Molybdenum is used as a gate electrode metal in thin-film transistor (TFT) arrays for LCD and OLED displays — where its combination of low resistivity, excellent adhesion to glass, and compatibility with the photolithography process makes it the preferred metal. In photovoltaic manufacturing, molybdenum is the standard back contact material for CIGS (copper indium gallium selenide) solar cells. Pure molybdenum targets (99.95%–99.9999%) are produced in large planar and rotary configurations weighing tens to hundreds of kilograms, representing significant per-unit value. Surplus targets — used, partially eroded, or new-in-packaging from process changes — are of immediate interest to target recyclers and secondary thin film material processors who recover the molybdenum content.

Molybdenum trioxide (MoO₃) is the primary intermediate in molybdenum's production chain — roasted molybdenite ore is converted to technical-grade MoO₃ (typically 57–60% Mo), which is then either reduced to pure molybdenum metal or reacted to produce ferromolybdenum or molybdenum chemicals. Technical-grade MoO₃ in briquetted or granulated form is used directly as a steel addition in some processes. High-purity chemical-grade MoO₃ is a feedstock for catalyst production — molybdenum catalysts are essential in petroleum refining for hydrodesulfurization (HDS), the process that removes sulfur from fuels to meet environmental standards. Surplus MoO₃ from closed processing operations, quality-rejected production lots, or commodity trading positions finds active buyers among ferromolybdenum producers, catalyst manufacturers, and specialty chemical companies.

Molybdenum powder — produced by hydrogen reduction of MoO₃ — is the primary feedstock for all powder metallurgy molybdenum products. Fisher Sub-Sieve Sizer (FSSS) particle size governs the application: fine powder (1–3 µm FSSS) is used for TZM and Mo-La alloy production as well as molybdenum carbide production; medium grades (3–8 µm) serve sintered pure molybdenum products; coarse grades serve thermal spray applications. High-purity molybdenum powder (99.95%+) is the starting material for sputtering target manufacturing. Spherical molybdenum powder produced by plasma atomization or gas atomization is an emerging feedstock for laser powder bed fusion (LPBF) additive manufacturing of molybdenum components, particularly for extreme-temperature applications in fusion energy, aerospace, and high-temperature processing equipment.