Copper is a metallic element and a transition element. Pure copper is a soft metal. When cut, the surface is red-orange with a metallic luster. The pure copper is purple-red. It has good ductility, high thermal and electrical conductivity, so it is the most commonly used material in cables and electrical and electronic components. It can be used as a building material and can be composed into many kinds of alloys. Copper alloys have excellent mechanical properties and very low resistivity, the most important of which are bronze and brass. Additionally, copper is a durable metal that can be recycled multiple times without losing its mechanical properties.

Copper series: T2 (C1100), TU00 (C67300 C67400), TU1, TU2, TU3 (C67300 C67400), TP1 (C67300 C67400), TP2 (C67300 C67400)

Brass series: H62 (C2800), H63 (C2720), H65 (C2680), H68 (C2620), H70 (C2600), H85 (C2300), H90 (C2200), H96 (C2100)

Bronze series: XYK-6 (C50715), QSn4.0-0.3 (C5111/C5100), QSn6.5-0.1 (C5191), QSn8.0-0.3 (C5210), QSn10-0.3 (C5240)