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Which of the following impurity in cast iron makes it hard and brittle ?

saurabhjain

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21 members have voted

  1. 1. Which of the following impurity in cast iron makes it hard and brittle ?

    • Sillicon
      6
    • Sulpur
      8
    • Manganese
      5
    • Phosphorus
      2

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silicon makes it soft..

sulphur makes it brittle but decreses strength..

mangnese makes it hard but dont kno about brittleness..

phosphorus makes it brittle but dont kno about hardness..

so m confused..

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sulphur makes cast iron hard and increase in hardness makes cast iron brittle and decrease in hardness increase ductility. so hardness test is important in low alloy steels

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