[China Aluminum Network] Aluminum alloy wires are widely used in various industries, especially in electrical and power transmission applications. The most commonly used types include high-strength aluminum alloy wires and heat-resistant aluminum alloy wires. These materials have been developed to enhance performance in terms of strength, conductivity, and thermal stability. 1. **High-Strength Aluminum Alloy Wire** This type of wire is made by adding magnesium and silicon to pure aluminum, which significantly improves its mechanical properties. After undergoing deformation and heat treatment, it achieves a good balance between strength, ductility, and electrical conductivity. It is commonly used in overhead power transmission lines due to its superior performance compared to standard aluminum wires. The conductivity of high-strength aluminum alloy wire is approximately 53% IACS, while its tensile strength can exceed 300 MPa—nearly double that of regular aluminum wire, which typically has a strength range of 150–170 MPa. This makes it ideal for applications where durability and reliability are essential. 2. **Heat-Resistant Aluminum Alloy Wire** Heat-resistant aluminum alloy wires are designed to operate at higher temperatures than conventional wires. They come in two main categories: those with a conductivity of 58% IACS and highly conductive heat-resistant variants. These wires can function efficiently at 150°C, compared to the 90°C limit of standard aluminum wires, allowing for a 61–69% increase in current-carrying capacity. This makes them suitable for use in environments where thermal stress is a concern. Additionally, their high strength helps improve dynamic stability during short circuits or overloads, while their heat resistance enhances thermal performance. Ongoing research is focused on developing super-heat-resistant and ultra-high-heat-resistant alloys, which could raise the long-term operating temperature to as high as 180°C, 210°C, and even 230°C. These advanced aluminum alloy wires are playing an increasingly important role in modern power systems, offering improved efficiency, safety, and longevity in demanding conditions.
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