Patent ID: 6613274
Filing Date: 2003-09-02
Classification: C22C

Abstract:
A cast iron alloy comprising 3.0-3.8% carbon by mass, 1.6-2.5% silicon by mass, 0.2-0.65% manganese by mass, 0.01-0.1% tin by mass, <0.025% sulfur by mass, 0.001-0.020% magnesium by mass, 0.1-1.2% copper by mass, 0.04-0.2% chromium by mass, and balance up to 100% of iron and incidental impurities by mass, wherein the matrix structure is a continuously variable ferrite/pearlite mixture, wherein the content of carbides is less than 1% by mass, andwherein the graphite shape of the alloy is 1-50% flake graphite, 50-99% compacted graphite and at most 10% spheroidal graphite, given as percentages of the relative amounts of graphite particles in the cast iron alloy that are present as flake graphite and compacted graphite, respectively.