Patent ID: 8012410

Claim:
An enhanced high temperature strength ductile iron alloy consisting of: carbon in an amount of 2.79 to 2.9% by weight, silicon in an amount of 4.17 to 4.67% by weight, niobium in an amount of 0.6 to 0.77% by weight, manganese in an amount of 0.6% by weight or less, sulfur in an amount of 0.02% by weight or less. phosphorus in an amount of 0.02% by weight or less, nickel in an amount of 0.08 to 0.14% by weight or less, chromium in an amount of 1.0% by weight or less, magnesium in an amount of 0.1% by weight or less, any other single element in an amount of 0.02 to 0.05% by weight, up to a combined total of 0.2% by weight of all such other elements, and the balance iron.