What is the percentage of carbon in steel?

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ALP CBT 2 Fitter Previous Paper: Held on 23 Jan 2019 Shift 1
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  1. Less than 2%
  2. More than 50%
  3. Greater than 2%
  4. 100%

Answer (Detailed Solution Below)

Option 1 : Less than 2%
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Detailed Solution

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Explanation:

  • Plain carbon steel is an alloy of iron and carbon.
  • It has good machinability and malleability.
  • It is different from cast iron as regards the percentage of carbon.
  • It contains carbon from 0.06 to 1.5% whereas cast iron possesses carbon from 1.8 to 4.2%.
  • Depending upon the carbon content, plain carbon steel can be divided into the following types:
    • Dead carbon steel — up to 0.15% carbon
    • Low carbon or mild steel — 0.15% to 0.45% carbon
    • Medium carbon steel — 0.45% to 0.8% carbon
    • High carbon steel — 0.8% to 1.5% carbon

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