Well thermal stability: suitable for conditions involving rapid heating and cooling. Excellent corrosion resistance and impact performance, ensuring reliable product quality. Resistant to strong acids and strong alkalis. Good heat transfer performance helps significantly shorten melting time and save energy. Ash content less than 0.1%, preventing contamination during precious metal smelting. Low thermal expansion coefficient at high temperatures, with good resistance to thermal shock and quenching. Long service life. Color: Black Size: 40 x 30mm Hole diameter: 20mm Material: Graphite Bulk density ≥ 1.78 g/cm³ Electric resistivity ≥ 9 Ohm·m Bending strength ≥ 40 MPa Compressive strength ≥ 70 MPa Particle size ≤ 43 μm High thermal conductivity and temperature resistance. Suitable for melting gold, silver, and other precious metals and high-purity alloys. Designed for high-temperature applications, with oxidation and corrosion resistance, and extended service life. Usage: Graphite crucibles are commonly used in the smelting of alloy tool steels and nonferrous metals and their alloys. They can also be used in the processing of graphite products such as casting crucibles, pull rods, molds, and similar components. Graphite crucibles offer greater durability than standard materials, longer service life, and the ability to withstand temperatures exceeding 2000°C. Usage Tips: Store in a dry place. Do not expose to moisture. After drying, avoid contact with water. Avoid mechanical impact, dropping, or striking. Package Included: 1 x Pure Graphite Crucible Cup Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement tolerance: ±1–3 cm.