Material Selection For Copper Sheet Stamping: What You Need To Know

Copper sheet stamping refers to the process of shaping copper sheets into specific parts through stamping equipment and dies. It involves cutting, bending, stretching, and forming, leveraging copper's excellent ductility and conductivity. Material selection in this process directly affects product performance, production efficiency, and cost, making it a critical first step in copper sheet stamping.
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. Core Considerations for Material Selection​

1.1 Copper Alloy Types​

Pure copper (T2, T3): High conductivity (≥98% IACS) but low strength, suitable for low-stress electrical components.​

Brass (H62, H65): Good machinability and corrosion resistance, ideal for parts requiring both formability and durability.​

Phosphor bronze (QSn6.5-0.1): High elasticity and fatigue resistance, used in spring-like components.

 

1.2 Thickness and Hardness​

Thickness ranges (0.1mm-3.0mm) for copper strip stamping are chosen based on part size and structural requirements. Hardness grades (soft, half-hard, hard) determine stamping difficulty-softer materials suit complex shapes, while harder ones work for high-strength parts.​

 

1.3 Surface Quality​

Smooth surfaces with minimal oxidation for copper stamped components ensure uniform stamping and reduce die wear. Materials with oxide layers may require pre-treatment before stamping.

 

2. Product Characteristics​

2.1 High precision: Copper stamping parts achieve tolerances within ±0.02mm, meeting tight assembly requirements.​

 

2.2 Excellent conductivity: Copper strip stamping maintains 90%+ of copper's original conductivity, critical for electrical applications.​

 

2.3 Good formability: Copper stamped components can form complex shapes (such as curved contacts) in one stamping process, reducing production steps.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Application Fields
3.1 Switches
Copper sheet stamping (often H62 brass) produces contact pieces, leveraging conductivity and wear resistance to ensure stable current transmission in switches.

 

3.2 Circuit Breakers
Copper stamping parts made from phosphor bronze serve as trigger components, using their elasticity to respond quickly to current overloads.

 

3.3 Contactors
Copper strip stamping forms main contact plates from pure copper, providing low resistance to handle high currents in industrial contactors.