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The major constituent of phosphor bronze is
1. Zinc
2. Copper
3. Lead
4. Aluminium

1 Answer

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Correct Answer - Option 2 : Copper

Phosphorous bronze

  • Phosphorous bronze contains 90% copper, 9.7% tin and 0.3% phosphorus.
  • The box nut or replaceable nut of a bench vice is made up of phosphorous bronze.

Gunmetal

  • Gunmetal is typically composed of 86% copper, 9.5% tin, 2.5% lead, and 2% zinc.
  • It was used mainly for making guns and bullets. Now it is superseded by Steel.
  • Gunmetal is used extensively for making heavy machinery parts as it can withstand high pressure and is corrosion resistant.

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