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What would be the tensile strength of gray cast iron of class 20?

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in Casting-Forming-Welding II by (119k points)
What would be the tensile strength of gray cast iron of class 20?

(a) 120 MPa

(b) 163 MPa

(c) 138 MPa

(d) 152 MPa

The question was posed to me in a job interview.

The origin of the question is Cast Irons in portion Foundry Introduction & Materials of Casting-Forming-Welding II

1 Answer

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Best answer
Correct option is (c) 138 MPa

The best I can explain: Tensile strength of gray cast iron of class 20 is 163 MPa.

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