Red copper is a kind of pure copper, which can generally be considered as pure copper. It has good conductivity and plasticity, but poor strength and hardness. Brass is a kind of copper containing other alloy components, which is cheaper than red copper, and its conductivity and plasticity are a little worse than red copper, but its strength and hardness are higher.

Brass is an alloy of copper and zinc. The simplest brass is a binary alloy of copper and zinc, which is called simple brass or ordinary brass. Brass with different mechanical properties can be obtained by changing the zinc content in brass. The higher the zinc content in brass, the higher the strength and slightly lower the plasticity.