Patent ID: 9567657
Date: 2017-02-14
CPC Classifications: C21C,C21D,C22C,F01N,F05D

Claim:
1. An austenitic cast iron, comprising: basic elements comprising carbon (C), silicon (Si), chromium (Cr), nickel (Ni), manganese (Mn) and copper (Cu); and the balance comprising iron (Fe), inevitable impurities and optionally a trace-amount modifier element; it is an austenitic cast iron being a cast iron that is structured by a base comprising an Fe alloy in which an austenite phase makes a major phase in ordinary-temperature region; wherein said basic elements fall within compositional ranges that satisfy the following conditions when the entirety of said cast iron is taken as 100% by mass (hereinafter being simply expressed as “%”): an austenite proportion is 70% or more after being retained at 500° C. for 300 hours in air after being cast.