IrOsW

IrOsW is a ternary refractory metal alloy combining iridium, osmium, and tungsten—three of the densest and highest-melting elements in the periodic table. This ultra-high-performance alloy is primarily of research and specialized industrial interest, valued for extreme environments where conventional superalloys and refractory metals fail, such as aerospace propulsion systems, high-temperature crucibles, and radiation shielding applications. Its appeal lies in exceptional thermal stability and density, though limited commercial availability and very high cost restrict it to mission-critical applications where no alternative suffices.