Alloy Cast Iron

 The cast irons discussed so far are called plain cast irons, in the sense that the above cast irons contain only small amounts of impurities.

ALLOY CAST IRON

1. What are Alloy Cast Irons?

✓ The cast irons discussed so far are called plain cast irons, in the sense that the above cast irons contain only small amounts of impurities.

✓ The alloy cast irons, like alloy steels can be produced by adding alloying elements like Ni, Cr, Mo, Cu, Si, and Mn.

✓ In general, the effects of alloying elements on the properties of cast iron are similar to the effects of same elements on the properties of steel.

✓ Purpose: Alloy cast irons have been produced to give high- strength materials, hard and abrasion-resistant materials, corrosion resistant irons, and irons for high-temperature service.

2. Effects of Alloying Elements in Cast Iron

Table 3.15 presents some of the alloying elements and their primary effects on the cast iron.

3. Properties and Applications of Alloy Cast Irons

Table 3.16 presents compositions, typical mechanical properties, and applications of some of the commonly used alloy cast irons.