Gun Metal Scrap in Australia

Gun metal scrap is a type of bronze scrap, which is an alloy of copper, tin, and sometimes zinc or lead. It is known for its high tensile strength, corrosion resistance, and good casting and machining properties.

Here are some key points about gun metal scrap:

  • Composition: Gun metal typically consists of approximately 88% copper, 8-10% tin, and 2-4% zinc. Variations exist, and sometimes lead may be present in small amounts.
  • Properties: Gun metal is valued for its:
    • High tensile strength: This makes it suitable for applications requiring structural integrity.
    • Corrosion resistance: It can withstand exposure to steam, saltwater, and other harsh environments.
    • Good casting and machining properties: This allows for the creation of complex shapes with relative ease.
  • Uses: While the name implies a historical use in gun manufacturing, gun metal scrap is more commonly used today in:
    • Steam and hydraulic castings
    • Valves and gears
    • Statues and other decorative objects
    • Various small parts

Grades of Gun Metal Scrap:

There are various grades of gun metal scrap, each with specific characteristics and applications. Some common grades include:

  • GM C2: This is a general-purpose gun metal with good overall properties.
  • GM C92300: This grade offers high strength and is often used in demanding applications.
  • GM C90300: This is a lead-free gun metal suitable for situations where lead contamination is a concern.
  • GM LG2 and GM PB2: These grades contain higher lead content and are typically used in less critical applications.

Recycling Gun Metal Scrap:

Gun metal scrap is a valuable recyclable material. It is collected, sorted, processed, and then remelted to create new gun metal products or other copper-based alloys. Recycling gun metal scrap helps conserve natural resources and reduces energy consumption compared to virgin material production.