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