Characteristics of gray cast iron

Q.  The gray cast iron has ____
- Published on 11 Sep 15

a. high melting point
b. high thermal conductivity
c. low compressive strength
d. all of the above

ANSWER: high thermal conductivity

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    Discussion

  • Chit Min Swe   -Posted on 01 May 21
    Can i know what is best carbon and silicon for gray iron.And how to calculate carbon and silicon percentage?I mean if i melting 400kg how many need carbon and how to calculat.
  • Chit Min Swe   -Posted on 01 May 21
    Can i know best carbon and silicon for gray iron?And how to calculate carbon and silicon percentages? I mean if we mealtin 200kg how many need graphite?
    Thank you for this mail
    I'm waiting your replay
  • Sravanthi   -Posted on 21 Nov 15
    - Grey cast iron has graphitic microstructure. Gray cast iron consists of 2.4 to 3.8% carbon, 1.2 to 3.5% of silicon, 0.5 to 1.0% of manganese, 0.06 to 0.12% of sulphur.

    - Graphite ferrite mixture in the microstructure of gray cast iron is soft and weak. The strength and hardness of ferrite mixture increases, if carbide content increases.

    - Gray cast iron has high thermal point and hence has high ability to withstand shocks.

    - It has low melting point (1150° C to 1250° C) than steel. They require simple furnaces such as pit furnace, cupola, etc. Impurities can be controlled as they are not critical as observed in steel.

    - It has high compressive strength of 110 to 350 N/mm2. It is 3 to 5 times greater than tensile strength.

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