Overview
Pure tungsten cubes are precision-machined blocks made from nearly 100% tungsten, one of the densest naturally occurring elements (1.7x denser than lead). These cubes serve both functional and aesthetic purposes across industries. As a refractory metal, tungsten maintains structural integrity at extreme temperatures, making it indispensable in high-temperature applications. The cubes' compact size belies their substantial weight, creating a unique tactile experience prized by collectors and educators.
Physical and Chemical Properties
Tungsten cubes exhibit exceptional physical properties including a density of 19.25 g/cm³ - comparable to gold but at a fraction of the cost. Their Vickers hardness ranges between 300-700 HV depending on purity and processing. Chemically, tungsten demonstrates remarkable inertness at room temperature, resisting attack from most acids except a nitric-hydrofluoric acid mixture. The metal forms a protective oxide layer at high temperatures, preventing further oxidation up to approximately 400°C.
Main Applications
In industrial settings, tungsten cubes function as calibration weights for precision scales and vibration dampers in high-speed machinery. Their radiation-shielding properties make them valuable in medical imaging and nuclear applications. The scientific community utilizes these cubes as electrode materials and crucibles for crystal growth. Recently, they've gained popularity as desk ornaments and educational tools to demonstrate density concepts in physics classrooms.
Safety and Storage
While tungsten is biologically inert, its extreme density requires careful handling to prevent impact injuries. Always lift cubes with both hands and store on stable surfaces. For long-term storage, maintain cubes in low-humidity environments to prevent surface oxidation. Industrial-grade cubes used in radiation applications should be periodically inspected for surface defects that could compromise shielding effectiveness.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification for quality management. Key specifications include: purity level (standard 99.95% or high-purity 99.995%), dimensional tolerances (typically ±0.1mm), and surface roughness (Ra value). For radiation applications, request mill certificates verifying low thorium content (<0.5ppm). Consider ordering samples to verify machinability before large purchases, as tungsten's hardness varies with grain structure and sintering methods.
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