Which of the following display properties similar to that of steel? 1. Black-heart cast iron 2. White-heart cast iron 3. Gray cast iron 4. Pig iron

Which of the following display properties similar to that of steel? 1.

1.	Which of the following display properties similar to that of steel? 1. Black-heart cast iron 2. White-heart cast iron 3. Gray cast iron 4. Pig iron
A.	1 and 2 only
B.	3 and 4 only
C.	2 and 4 only
D.	1 and 3 only
Answer» B. 3 and 4 only

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Which of the following display properties similar to that of steel? 1. Black-heart cast iron 2. White-heart cast iron 3. Gray cast iron 4. Pig iron

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