Nb521 Niobium Tungsten alloy

‌Nb521 is a niobium-based alloy with special properties. It is mainly composed of niobium (Nb) as a matrix, and added with tungsten (W), molybdenum (Mo), zirconium (Zr) and other alloying elements, as well as trace amounts of carbon (C )element.

Nb521 niobium tungsten alloy is a material with excellent room temperature and high temperature mechanical properties, high melting point and low density. This alloy is widely used in ‌aerospace engines, ‌weapon thrusters, ‌rocket missile liquid bicomponent engines, ‌nuclear reactors, ‌submersibles, ‌gas turbines, ‌automotive engines, ‌diesel engines, high-temperature furnace heating zones, high-temperature Manufacturing of molds, high-temperature fixtures, and high-temperature crucibles.

Chemical composition of Nb521 Niobium Tungsten alloy

Gas impurities of Nb521 Niobium Tungsten alloy

Physical properties of Nb521 spherical powder

Physical and Mechanical Properties

Nb521 offers an excellent combination of high-temperature strength and oxidation resistance, making it suitable for extreme thermal conditions.

• Density: Similar to other niobium alloys, Nb521 has a relatively low density compared to nickel-based alloys, offering weight advantages in aerospace applications.
• Melting point: Nb521 can withstand extremely high temperatures, with a melting point of over 2400°C.
• Tensile strength: High tensile strength at elevated temperatures, providing durability in high-stress environments.
• Creep resistance: Excellent creep resistance allows Nb521 to maintain its structural integrity during prolonged exposure to heat and stress.

Applications

Nb521 is primarily used in high-temperature, high-stress applications. Common uses include:

Rocket engines: Nb521 is used in rocket engine nozzles and other high-temperature components due to its ability to maintain strength and oxidation resistance in extreme conditions.

Turbine engines: The alloy is suitable for components like turbine blades and other parts in aircraft engines that are exposed to high heat.
Heat shields and thermal protection: Nb521 is employed in systems where thermal protection is critical, such as re-entry shields for spacecraft.

Comparison with Other Niobium Alloys

Compared to other niobium alloys like C103, Nb521 offers improved oxidation resistance and similar mechanical strength at high temperatures. While C103 is more commonly used in aerospace applications, Nb521 may be preferred in situations where enhanced creep and oxidation resistance are required. Its performance is also comparable to molybdenum-based and tungsten-based alloys but with a lower density and better workability.