Heat cast iron and an exhaust equipment member made thereof

A graphite-containing heat-resistant cast iron used for exhaust equipment members used at temperatures above 800 ° C., Si by weight: 3.5 to 5.6% and W: containing 1.2-15%, W at the boundary between the graphite and the matrix structure and heat cast iron with an intermediate layer with Si enriched. Exhaust equipment consisting of the heat-resistant cast iron is a A