Patent ID: 9719157
Date: 2017-08-01
CPC Classifications: C21C,C21D,C22C,F02F

Claim:
1. A flake graphite cast iron comprising 3.0 to 3.2% of carbon (C), 2.0 to 2.3% of silicon (Si), 1.3 to 1.6% of manganese (Mn), 0.1 to 0.13% of sulfur (S), 0.06% or less of phosphorus (P), 0.6 to 0.8% of copper (Cu), 0.25 to 0.35% of molybdenum (Mo), 0.003 to 0.006% of strontium (Sr), and the balance iron (Fe) satisfying 100% as a total weight %, and having a chemical composition, in which a ratio (Mn/Sr) of the content of manganese (Mn) to the content of strontium (Sr) is in a range of 216 to 515.