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Mechanical Engineering · Q141

Engineering Materials

Engineering and GATE · Mechanical Engineering · question 141

Q141

The percentage of carbon in grey iron castings usually varies between

A.
0.5 to 1%
B.
1.2%
C.
2.5 to 4.5%
Answer
D.
5 to 7%

Answer: Option C

Solution

Answer: Option C
Solution:
Most cast irons have a chemical composition of 2.5 - 4.0% carbon, 1 - 3% silicon, and the remainder iron.
Grey cast iron has less tensile strength and shock resistance than steel, but its compressive strength is comparable to low- and medium-carbon steel.
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