Molybdenum Metal and TZM Alloy
Take the Heat with Molybdenum Metal
Molybdenum metal and the major alloy TZM (Titanium-Zirconium-Molybdenum) are produced as a press and sintered ingot product with subsequent forging, rolling, extrusion, or drawing to obtain the final product form.
Molybdenum is a plentiful, cost-effective refractory metal known for its strength and stability in high-heat applications. Softer and more ductile than tungsten, it is often alloyed with other compounds to improve corrosion resistance and strength at high temperatures. Molybdenum TZM is an established molybdenum metal alloy (0.50 Ti, 0.08 Zr, balance Mo), which is consolidated by either the P/M or vacuum arc-casting processes. It gives excellent service in applications that require high strength and creep resistance at elevated temperatures. TZM molybdenum alloy also permits higher service temperatures without softening or weakening.
Typically available in rod/bar, foil, sheet, and plate, the molybdenum metal material can be machined or formed to the final configuration. For special applications, this product can also be produced using an arc-cast melting process which can provide improved creep resistance at high temperatures. Molybdenum material is ideally suited for applications requiring dimensional stability in electronic components and high-temperature applications in a vacuum or controlled atmosphere requiring exceptional mechanical properties.
What you need to know about buying Molybdenum Metal or TZM materials:
- Flat molybdenum metal products are produced per ASTM B386 with round products produced to ASTM B387.
- The widely used grades are:
- Molybdenum 360 – Unalloyed vacuum arc-cast molybdenum
- Molybdenum 361 – Unalloyed powder metallurgy molybdenum
- Molybdenum 363 – Vacuum arc-cast TZM
- Molybdenum 364 – Powder metallurgy TZM
- Molybdenum 365 – Unalloyed vacuum arc-cast
- Tempers – Materials can be supplied in the “SR (Stress Relieved)” or “RX (fully recrystallized)” conditions. Material supplied SR unless specified.
- Deep Drawing Grade – This must be specified at the time of inquiry for flat products.
- All tolerances for thickness, diameter, and flatness are per applicable specifications or as agreed before quoting.
- Due to the sensitivity of molybdenum metal to oxygen, it is important to provide the type of atmosphere or corrosive environmental exposure the material will see.
Product Selection and Purchasing Options
Beyond molybdenum metal and TZM alloy, Leading Edge offers a wide range of products in multiple shapes and sizes, even in small quantities. Many are available for immediate shipment from our warehouse. If we don’t have the specialty material you need, there’s a good chance we can find it. With our flexible purchasing options, you can ensure materials are available when they’re needed. Purchasing options include blanket orders, just-in-time delivery, and consignment materials.
Industry Standards and Requirements
Industries constantly evolve, driven by a growing demand for scientific and technological advancement. Successful experimentation must ensure material integrity, safety, performance, and compliance with strict environmental and operational regulations.
These standards typically focus on aspects like purity, quality, and durability to guarantee that refractory metals meet the demanding conditions of high-stakes research applications. Because they serve multiple industries and extreme environments, this list includes more than average standards and requirements.
Standards and Requirements:
- ASTM International (American Society of Mechanical Engineers): Standards for materials used in energy applications.
- SAE Aerospace Material Specifications (AMS, formerly known as the Society of Automotive Engineers or SAE)
- ASME BPVC (Boiler and Pressure Vessel Code): Guidelines for materials used in pressure vessels and reactors.
- Department of Defense (DoD) Military Standards or Military Specifications (MIL) on the Defense Logistics Agency (DLA) ASSIST Database
We adhere to quality compliance certification standards and statutory regulations that pertain to our exotic materials, processes, custom machining services, traceability, and other aspects of our in-house expertise. Our materials specialists provide expert counsel on metal selection and inspection to ensure you receive materials that meet or exceed your expectations.
Leading Edge Metals & Alloys Certifications include:
- ISO9001:2015 and AS9100D Registered
- ITAR Registered
- NIST SP 800-171 and CMMC Complian
Our deep understanding of this industry stems from our extensive experience, skilled metallurgy professionals, and a history of successful partnerships with leading national research labs.
FAQs About Molybdenum & TZM
Customers should disclose operating temperature ranges, atmospheric exposure (vacuum, inert gas, air), mechanical loads, and thermal cycling expectations. These factors are critical to determining whether pure Molybdenum or TZM is the appropriate choice.
Yes. Leading Edge Metals & Alloys supplies machined Molybdenum and TZM components based on customer drawings. This includes prototypes, low-volume production, and ongoing supply programs with flexible purchasing and delivery options.
Molybdenum performs exceptionally well in vacuum and inert atmospheres, but it oxidizes rapidly in oxygen-rich environments at elevated temperatures. For air-exposed applications, protective coatings or environmental controls may be required.
Molybdenum is typically supplied in the stress-relieved (SR) condition unless otherwise specified. Recrystallized (RX) material may be specified for applications requiring maximum ductility or forming. Deep-drawing grades must be identified at the time of inquiry.
Molybdenum and TZM products are commonly supplied to:
- ASTM B386 – sheet, plate, and foil
- ASTM B387 – rod and bar
The applicable specification depends on product form and processing method.
Common grades include:
- Molybdenum 360 – unalloyed, vacuum arc-cast
- Molybdenum 361 – unalloyed, powder metallurgy
- Molybdenum 365 – unalloyed, vacuum arc-cast (alternate designation)
- Molybdenum 363 – TZM, vacuum arc-cast
- Molybdenum 364 – TZM, powder metallurgy
Each grade supports different combinations of strength, ductility, and fabrication requirements.
Customers should specify material type (pure Molybdenum or TZM), product form, dimensions, tolerances, temper or condition (stress-relieved or recrystallized), applicable ASTM specification, and operating environment. Providing this information upfront allows Leading Edge Metals & Alloys (LEMA) to ensure proper material selection and efficient processing.
Molybdenum is generally machinable but becomes brittle at room temperature if improperly processed. Sharp tooling, controlled feeds, and appropriate stock allowances are important.
TZM is stronger and more abrasion-resistant than pure Molybdenum, which may increase tool wear. Machining strategies should account for material condition and final application tolerances.
Leading Edge Metals & Alloys supplies Molybdenum and TZM in rod, bar, sheet, plate, foil, and fabricated forms. Materials can also be provided as cut-to-size blanks or machined components based on customer drawings and performance requirements.
Molybdenum and TZM are widely used in vacuum furnaces, heat shields, sintering trays, electrodes, semiconductor manufacturing equipment, aerospace tooling, nuclear components, and research laboratory hardware. TZM is commonly chosen for furnace tooling and high-load thermal applications.
TZM is selected when components are subjected to sustained mechanical loads at high temperatures, such as furnace hardware, dies, or structural parts that must resist deformation and creep. Pure Molybdenum is often sufficient for non-load-bearing or lower-stress high-temperature applications.
Pure Molybdenum is valued for its high-temperature stability, machinability, and cost efficiency.
TZM (Titanium–Zirconium–Molybdenum) is a Molybdenum alloy engineered to provide higher strength, improved creep resistance, and better recrystallization behavior at elevated temperatures, allowing for higher service loads and longer component life.
Molybdenum offers a high melting point (approximately 2,623°C / 4,753°F), excellent strength at elevated temperatures, low thermal expansion, and strong thermal conductivity. It performs especially well in vacuum and inert environments and provides a favorable balance of performance and cost among refractory metals.
Molybdenum is used instead of conventional metals when applications require high-temperature strength, dimensional stability, and performance in vacuum or controlled atmospheres. Where stainless steels and Nickel alloys lose strength, creep, or distort, Molybdenum maintains mechanical integrity and predictable behavior.
