Newly developed grades for longer and stable tool life in machining of various cast irons - from grey cast iron (FC) to high-strength ductile cast iron (FCD). Features -High adhesion technology provides smooth cutting edge treatment for drastically improved peeling resistance - Crystal orientation control technology doubles crater wear resistance for high-speed machining - Special surface treatment achieves more than twice the compressive stress and 2x chipping resistance AC4010K: Grey cast iron AC4015K: High-strength ductile cast iron AC420K: Heavy interrupted machining