Non-ferrous Metal Materials

Copper

Characteristics: High electrical and thermal conductivity, and diamagnetic. It is ductile but work-hardens, superior corrosion resistance to iron (producing a green patina when moisture and carbon dioxide are present in the air), cannot be attacked by fresh water but is weak against seawater. It has a large shrinkage rate, making it difficult to cast.

Table 1: Copper Alloys

• Oxygen-Free Copper (C1020):
  • Uses: High-performance wires, heat sinks, etc.
  • Features: The highest purity among commercially available copper, and does not oxidize easily when heated at high temperatures.
• Tough Pitch Copper (C1100):
  • Uses: Electrical materials, architectural use, distillation kettles, gaskets, etc.
  • Features: The most commonly used copper, with excellent electrical and thermal conductivity.
• Brass Plate (C2801):
  • Uses: Wiring device parts, nameplates, instrument panels that require drawing or bending.
  • Features: High strength among copper alloys and possesses ductility.
• Free-Cutting Brass (C3604):
  • Uses: Parts requiring machining, such as valve components.
  • Features: An alloy containing lead and tin. The addition of lead improves the machinability of pure copper, and it has high strength and good ductility.