Overview
Cast copper plates are industrial-grade materials produced by melting and casting pure copper (≥99.9% Cu). They are distinguished by their reddish-brown color and superior conductivity properties. The casting process allows for the production of thick plates (typically 5-50mm) with consistent microstructure, making them suitable for heavy-duty applications. Unlike rolled copper sheets, cast plates exhibit slightly lower mechanical strength but better thermal dissipation due to their grain structure. They are widely used in industries requiring high electrical efficiency or heat transfer, such as power generation, electronics, and HVAC systems.
Physical and Chemical Properties
Cast copper plates boast exceptional electrical conductivity (100% IACS at 20°C) and thermal conductivity (401 W/m·K), outperforming most non-precious metals. Their face-centered cubic crystal structure grants high ductility, allowing cold working without cracking. The natural oxide layer provides corrosion resistance in atmospheric conditions. Chemically, copper reacts slowly with oxygen to form a protective patina and is resistant to freshwater and steam. However, it is susceptible to ammonia compounds, sulfur, and oxidizing acids. The density (8.96 g/cm³) makes it heavier than steel, while its melting point (1085°C) suits high-temperature environments.
Main Applications
In electrical engineering, cast copper plates serve as busbars, transformer windings, and switchgear components due to minimal energy loss. Their thermal properties make them ideal for heat exchanger plates in refrigeration systems and industrial boilers. Architecturally, they are used for roofing, cladding, and decorative elements, prized for their aesthetic aging characteristics. The plates are also machined into bearings, gears, and wear plates for heavy machinery, benefiting from copper's self-lubricating properties. Emerging applications include electromagnetic shielding and renewable energy systems.
Safety and Storage
While elemental copper is non-toxic, proper handling prevents physical injuries from sharp edges. Dust inhalation during machining should be avoided—use local exhaust ventilation. Store plates horizontally on wooden pallets in low-humidity environments to prevent surface oxidation. For long-term storage, apply anti-tarnish inhibitors or vacuum-seal with desiccants. Avoid contact with dissimilar metals (e.g., aluminum, steel) to prevent galvanic corrosion. In case of fire, use Class D extinguishers for molten copper; water causes dangerous steam explosions.
B2B Procurement Guide
Specify required standards (ASTM B152, EN 1652, or GB/T 2040) when ordering. Key parameters include: thickness tolerance (±5%), oxygen content (<0.03% for electronic grades), and hardness (typically 40-100 HV). For large batches, request mill test certificates verifying composition. Lead times vary from 2-6 weeks for custom castings. Consider FOB pricing from major producers in China (Jiangxi, Anhui), Germany, and Japan. For cost-sensitive projects, recycled copper plates (Cu-ETP) offer 10-15% savings but may have higher impurity levels. Always conduct eddy-current testing for internal defects.
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