Performance Comparison and Scene Adaptation Selection between Aluminum Wire and Copper Wire-Jiangsu Hetuo Aluminum Wire Co., Ltd.

In the field of electrical transmission and electronic manufacturing, aluminum wire and copper wire are the two most widely used conductive materials. With their different performance advantages, they are suitable for different application scenarios. Reasonable selection of wire materials can not only ensure the stability and safety of equipment operation, but also effectively control production costs. The performance differences between the two are mainly reflected in electrical conductivity, mechanical properties, cost control, corrosion resistance and other dimensions. Clarifying these differences is the key to achieving precise scene adaptation.

In terms of electrical conductivity, copper wire has more excellent conductivity, with a resistivity as low as 0.0172μΩ・m and a conductivity of about 58.0×10⁶ S/m, which is the material with the second best electrical conductivity in industry after silver; while the resistivity of aluminum wire is about 0.0283μΩ・m and the conductivity is about 37.7×10⁶ S/m, which is only about 65% of that of copper wire. This means that under the same current and wire diameter conditions, aluminum wire has higher resistance, more obvious heat generation and relatively higher power loss; to achieve the same conductive effect as copper wire, aluminum wire needs to increase the wire diameter and material dosage, which will offset its cost advantage to a certain extent. Therefore, in scenarios with extremely high requirements for electrical conductivity, such as high-precision electronic equipment, large power transformers and high-frequency signal transmission, copper wire is still the first choice.

In terms of mechanical properties, copper wire has higher mechanical strength, with a tensile strength of 200-400MPa, an elongation of more than 30% and excellent toughness. It can withstand large tensile force and bending, and is not easy to break, so it is suitable for application scenarios that need frequent force and vibration such as motor windings; aluminum wire has relatively low mechanical strength, with a tensile strength of generally 90-200MPa and an elongation of about 15-25%, which is relatively soft and prone to creep deformation under long-term force. However, its mechanical properties can be significantly improved through alloying and other process improvements, which can meet the use needs of most conventional scenarios.