Copper/Brass in Stamping

Copper and its main alloy series - brass (copper-zinc alloy) - are long-standing and high-performance non-ferrous metal materials in the field of sheet metal stamping. They are favored for their excellent electrical conductivity and thermal conductivity, excellent cold formability, natural corrosion resistance, and unique visual appeal. Commercial pure copper (such as C11000) has extremely high electrical conductivity (over 100% IACS) and thermal conductivity; in its fully annealed state, its excellent ductility supports processes such as deep drawing, blanking, punching, bending, and high-precision progressive stamping. For applications such as high-performance electrical connectors, bus bars, electromagnetic interference (EMI) shielding components, and efficient heat sinks that must ensure no compromise in electrical or thermal performance, pure copper is always the preferred material.

Bronze is designed in terms of its composition by adjusting the zinc content (the most common types being 70/30 bronze C26000 and 65/35 bronze C26800). Compared to pure copper, it achieves a balance between maintaining excellent resistance to atmospheric corrosion and a distinctive golden appearance, while also achieving higher tensile strength, excellent cutting performance, and reliable forming performance. Bronze is widely used in applications such as stamped spring contacts, plumbing hardware, decorative strips, lock components, and consumer electronic accessories. It is the main copper-based alloy in general precision stamping applications. In the electrical, automotive, decorative hardware, and thermal management industries, stamped copper and bronze parts have been the industry standard materials for decades, especially in the fields of high precision and performance-critical forming components.