Tungsten alloy screws, as high-performance fasteners, are widely used in aerospace, nuclear industry, marine engineering, and high-precision manufacturing due to their high density, excellent mechanical properties, good chemical stability, and flexible processing characteristics.
The physical properties of tungsten alloy screws stem from the unique attributes of tungsten metal. With a melting point of 3,422°C, tungsten is one of the most heat-resistant metals in nature, and its alloys (such as W-Ni-Cu or W-Ni-Fe) typically have a density ranging from 16.5 to 18.5 g/cm3, far exceeding that of ordinary steel. This high density enables exceptional counterweight and deformation resistance within a limited volume, making it suitable for fastening scenarios requiring high stability.
Tungsten alloys exhibit high tensile strength, retaining approximately 65%–80% of their strength in relatively high-temperature environments, outperforming traditional fastener materials. This allows them to effectively resist thermal stress and mechanical fatigue in high-temperature, high-pressure scenarios such as the fixation of aviation engine turbine blades or structural connections in deep-space probes, ensuring long-term operational reliability.
Tungsten alloy screws demonstrate outstanding chemical stability. Pure tungsten is highly stable chemically, showing almost no reaction to water, oxygen, or most acid and alkaline media at room temperature. After alloying with elements like nickel and copper, the grain structure of tungsten alloys is optimized, further enhancing their corrosion resistance.
Additionally, the high density of tungsten alloys provides excellent radiation shielding capabilities, effectively absorbing X-rays and gamma rays. This makes them widely used in the fastening of nuclear reactor pressure vessels and structural fixation in radioactive medical equipment, ensuring the safety of both equipment and personnel.
Overall, the key characteristics of tungsten alloy screws include high specific gravity, high melting point, high tensile strength, good chemical stability, and strong radiation shielding capabilities. They are applicable in microelectronics to support heat management in high-performance chips and in modular connections for tank armor.
