Question

) Why is gray cast iron annealed?​

Answer 1

Explanation:

The annealing of gray iron at a temperature high enough to minimize or eliminate massive eutectic carbides softens it to improve machinability, but reduces the grade level approximately to the next lower grade; for example, the properties of a class 40 gray iron (minimum 275 MPa, or 40 ksi, tensile) will be diminished ...

Answer 2

The annealing of gray iron at a temperature high enough to minimize or eliminate massive eutectic carbides softens it to improve machinability, but reduces the grade level approximately to the next lower grade; for example, the properties of a class 40 gray iron (minimum 275 MPa, or 40 ksi, tensile) will be diminished...!