Electrically Graded Aluminum Purity Requirements

Electrically graded aluminum, often referred to as EC grade aluminum, is specifically manufactured for use as an electrical conductor. Its primary use is in cables and wires because of its relatively low cost compared to copper and its good conductivity and low density.

For aluminum to be efficient as an electrical conductor, it must have a very high level of purity. Impurities in the metal can significantly increase its electrical resistance, reducing its ability to conduct electricity efficiently. Therefore, strict standards are applied to the purity of electrically graded aluminum.

The standard purity level required for electrically graded aluminum (EC grade) is typically 99.5% or higher. This high purity ensures minimal resistance and efficient flow of electric current.

Let's look at the given options:

• 98%
• 99.5%
• 93.9%
• 97.5%

Comparing these options to the standard purity requirement for electrically graded aluminum, the value of 99.5% matches the typical specification for EC grade aluminum used in electrical applications.

Therefore, electrically graded aluminum has a purity of 99.5%.