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The alloy steel designated as 40 Cr18 Ni 2 by Bureau of Indian Standards contains    
  • a)
    0.4% C, 18% Cr and 2% Ni
  • b)
    4.0% C, 1.8% Cr and 0.2% Ni
  • c)
    0.4% C, 1.8% Cr and 2% Ni
  • d)
    0.4% C, 1.8% Cr and 0.2% Ni
Correct answer is option 'A'. Can you explain this answer?
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The alloy steel designated as 40 Cr18 Ni 2 by Bureau of Indian Standar...
Ans. (a)
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The alloy steel designated as 40 Cr18 Ni 2 by Bureau of Indian Standar...
Explanation:

The alloy steel designated as 40 Cr18 Ni 2 by Bureau of Indian Standards contains the following components:

- 0.4% C: This indicates the carbon content in the alloy steel, which is relatively low. Carbon is added to steel to increase its hardness and strength, but too much carbon can make the steel brittle.
- 18% Cr: This indicates the chromium content in the alloy steel. Chromium is added to steel to increase its corrosion resistance, as well as its hardness and strength.
- 2% Ni: This indicates the nickel content in the alloy steel. Nickel is added to steel to improve its toughness, ductility, and strength, as well as its resistance to corrosion and high temperatures.

Therefore, the alloy steel designated as 40 Cr18 Ni 2 by Bureau of Indian Standards contains 0.4% C, 18% Cr, and 2% Ni.
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