Product details table:

Physical and chemical properties:

Physical properties

Appearance:

Copper coils typically exhibit a reddish-brown metallic color with a smooth, shiny surface. Different surface effects can be achieved through various treatment processes, such as polishing, lacquering, or oxidizing to create an antique finish.

Density:

The density of copper is approximately 8.96 g/cm³, which is significantly higher than that of stainless steel. This high density contributes to its excellent weight-to-strength ratio.

Melting point:

The melting point of copper is relatively high, around 1083°C. This allows it to maintain stability in high-temperature environments, making it suitable for applications involving heat exposure.

Coefficient of thermal expansion:

Copper has a moderate coefficient of thermal expansion, approximately 16.5×10⁻⁶/℃ at room temperature. This property ensures minimal dimensional changes when exposed to varying temperatures, providing good structural stability.

Thermal conductivity:

Copper exhibits excellent thermal conductivity, with a coefficient of approximately 401 W/(m·K). This makes it one of the best conductors of heat among metals, ideal for heat exchangers, cooling systems, and other thermal applications.

Electrical conductivity:

Copper is renowned for its superior electrical conductivity, approximately 5.96×10⁷ S/m, which is second only to silver. This property makes it indispensable in electrical wiring, transformers, and other electronic components.

Chemical properties

Corrosion resistance:

Copper possesses good corrosion resistance due to the formation of a protective oxide layer on its surface. This layer prevents further oxidation and degradation, allowing it to withstand exposure to atmospheric conditions, water, and certain chemicals. However, in highly acidic or ammoniacal environments, its corrosion resistance may be compromised.

Antioxidation:

Copper forms a stable oxide layer (cupric oxide or cuprous oxide) when exposed to air, which protects the underlying metal from further oxidation. This property ensures its longevity even in outdoor or high-temperature environments.

Chemical stability:

In general, copper demonstrates high chemical stability and does not readily react with common chemicals. However, it may corrode in the presence of strong acids (e.g., sulfuric acid) or alkalis, as well as in environments containing ammonia or chloride ions.

Passivation:

Unlike stainless steel, copper does not rely on passivation treatments. Instead, its natural oxide layer provides sufficient protection against corrosion. In specific applications, additional coatings or lacquers may be applied to enhance its durability.

Application:

Copper coils are widely used across various industries due to their exceptional thermal and electrical conductivity, corrosion resistance, and formability. In the electrical industry, they are used to manufacture wires, transformers, and motors, ensuring efficient energy transmission. In HVAC systems, copper coils are employed in heat exchangers, condensers, and evaporators due to their excellent thermal performance. In construction, they are used for plumbing, roofing, and decorative elements, combining functionality with aesthetic appeal. Additionally, in the automotive and electronics industries, copper coils are integral to components such as radiators, electromagnets, and circuit boards, adapting seamlessly to complex engineering requirements.