... power.3.application: solid PCBN inserts are used for rough and fine machining cast iron, grey cast iron, brake disk, roller, high ... , Die Steel Gauge Steel, Tool Steel, High Steel, etc. continuous and interrupted turning HRC50-64,powder metallurgy work-piece,thermal spray ... .we also can customize non-standed inserts as customers' drawings and designs . solid CBN inserts for machining gray cast iron ...