Gun metal is an alloy of

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Patna High Court Mazdoor Official Paper (Held On: 22 Jun, 2025)
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  1. Copper. Tin and Zinc
  2. Aluminium, Tin and Steel
  3. Copper Steel and Zinc
  4. Aluminium, Tin and Zinc

Answer (Detailed Solution Below)

Option 1 : Copper. Tin and Zinc
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Patna High Court Mazdoor: ST 1 General Knowledge & Awareness
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Detailed Solution

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The correct answer is Copper, Tin, and Zinc.

Key Points

  • Gun metal, also known as red brass, is an alloy primarily composed of Copper, Tin, and Zinc.
  • The typical composition of gun metal includes approximately 88% Copper, 10% Tin, and 2% Zinc.
  • Gun metal is widely used for cannon manufacturing, valves, gears, and other mechanical components due to its high strength and corrosion resistance.
  • This alloy is known for its excellent castability and machinability, making it suitable for precision engineering applications.
  • It is also favored for marine applications because of its resistance to saltwater corrosion.

Additional Information

  • Copper:
    • Copper is a highly conductive metal used in electrical wiring, plumbing, and alloys such as bronze and brass.
    • It adds strength and durability to gun metal while maintaining excellent corrosion resistance.
  • Tin:
    • Tin is a soft, malleable metal that enhances the corrosion resistance and strength of alloys.
    • It plays a crucial role in improving the mechanical properties of gun metal.
  • Zinc:
    • Zinc is often added to copper alloys to improve their machinability and reduce production costs.
    • In gun metal, zinc contributes to the overall hardness and structural integrity of the alloy.
  • Historical Use:
    • Gun metal was historically used to manufacture cannons and artillery due to its high strength and resistance to wear.
    • Today, it is extensively employed in industrial applications requiring durability and resistance to environmental factors.
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