We use gun metal for our earthing clamps and other components because its unique combination of copper, tin, and zinc makes it a strong, highly conductive, machinable and corrosion resistant alloy.
Gun metal was originally used for making cannons and guns due to its strength and resistance to corrosion. Over time, steel replaced gun metal in firearms manufacturing, but the alloy found new applications in other industries.
Gun metal, also known as red brass, is a type of bronze alloy primarily composed of copper, tin, and zinc. The typical composition includes 88% copper, 8-10% tin, and 2-4% zinc. Each of these elements contributes specific properties to the alloy:
Copper: The primary component, copper, provides excellent thermal and electrical conductivity, making it ideal for earthing.
Tin: Tin enhances the alloy’s strength and corrosion resistance, particularly against steam and saltwater. When added to copper, tin improves the alloy’s fluidity, making it easier to cast into intricate shapes. This is particularly useful in applications like bronze casting, where detailed and precise forms are required
Zinc: Zinc improves the alloy’s hardness and fluidity during casting, ensuring a smooth and durable finish. It helps reduce gas absorption during the melting process, acts as a deoxidizer, and improves the overall quality of the casting.
Gun metal is particularly suitable for casting electrical earthing clamps due to its excellent conductivity and corrosion resistance. The alloy’s high copper content makes for efficient electrical grounding, while the tin and zinc components provide durability and longevity in various environmental conditions. Additionally, gun metal’s fluidity during casting allows for precise and reliable clamp designs, ensuring secure connections in electrical systems.
