Insert grades GC3225 and GC3210 cover cast iron turning operations for both grey and nodular cast iron materials. While GC3225 provides secure, trouble-free machining in difficult conditions, flank wear-resistant GC3210 is suitable for turning in good to average machining conditions. Both provide requisite edge-line security and wear resistance for optimal performance via CVD coating combined with fine-grained hard substrate. Optimized micro-geometries facilitate light cutting action.