Tungsten – The Metal of Superlatives: Unmatched Heat Resistance and Purity

Tungsten (W) is a transition metal with atomic number 74, known for its extraordinary physical and chemical properties.

Key characteristics include:

• Exceptional heat resistance – after carbon, tungsten boasts the highest melting point of all elements at 3,422 °C and a boiling point near 5,700 °C. Its very low coefficient of thermal expansion (< 1 × 10⁻⁶ /°C) ensures dimensional stability under extreme temperatures.
• High density – 19.3 g cm⁻³, comparable to pure gold, making it ideal for high‑weight‑density applications.

By alloying tungsten with precise elements, we tailor its performance for specific roles. Typical enhancements include:

• Machinability & weldability – optimized for cutting, forming and joining processes.
• Microstructure control – tailored recrystallization temperatures, reduced embrittlement, and aging resistance.
• Chemical resilience – even hydrofluoric acid and aqua regia have negligible effect at room temperature.
• Electrical & thermal conductivity – maintained while preserving high melting point and low expansion.
• Mechanical robustness – superior strength, creep resistance and ductility at high temperatures.
• Corrosion resistance – ideal for harsh chemical environments.

Our premium‑purity tungsten is engineered for longevity in demanding environments. It excels as:

• Melting crucibles and mandrel shafts that endure quartz‑glass melts without bubble formation or discoloration.
• High‑temperature furnaces, lamp filaments and components for medical imaging and thin‑film deposition, where dimensional stability and chemical inertness are critical.
• Sapphire crystal growth vessels, where contaminant‑free, creep‑resistant material preserves crystal quality and process stability.

Because no other metal matches tungsten’s combination of a record melting point, near‑zero thermal expansion, and exceptional purity, it remains the material of choice for the most demanding high‑temperature applications.

For a deeper dive into our tungsten solutions, visit our dedicated page.