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Nb521 Niobium Tungsten alloy material has excellent room temperature and high temperature mechanical properties and high melting point, low density, high temperature and high strength and good processability.

Nb521 alloy is widely used in aerospace engines, weapon thrusters, rocket and missile liquid bicomponent engines, nuclear reactors, submersibles, gas turbines, automobile engines, diesel engines, high-temperature furnace heating belts, high-temperature molds, high-temperature fixtures, and high-temperature crucibles of manufacturing.

This type of alloy uses W, Mo, and Zr as alloying elements. The main strengthening mechanism is solid solution strengthening, and the recrystallization temperature is 1350°C-1500°C. Among them, Nb521 also uses 600-1000ppm C element to form NbC and ZrC second phases, and adopts solid solution + precipitation strengthening method to comprehensively improve the alloy strength and processing performance.

Compared with C103 alloy, niobium-tungsten alloy has similar density (8.6-9.0g·cm-3) and better high-temperature strength. However, due to the addition of a large amount of strengthening elements such as W and Mo, the room temperature strength of the ingot is high and the plasticity is poor. High-temperature extrusion is often used during ingot processing to refine the ingot grains. The plasticity of the alloy ingot after extrusion is greatly improved, and rods, plates, forgings and spun parts of the required specifications can be obtained through forging, rolling, spinning and other processing methods.