Hartmetallsorten Tabelle

Carbide grade classification and cross-referencing guide

Carbide grades are classified by ISO application groups (P, M, K, N, S, H) based on the material they are designed to cut. Within each group, grades range from tough (lower numbers, e.g., P10) to hard/wear-resistant (higher numbers, e.g., P50). This guide helps navigate the grade designations across major manufacturers.

• ISO P (Blue): Steel and cast steel. The largest category. P10 = finishing, P25 = general purpose, P40 = roughing/interrupted cuts.
• ISO M (Yellow): Stainless steel. M20 = austenitic finishing, M30 = general purpose, M40 = roughing. Tough grades needed to handle work hardening.
• ISO K (Red): Cast iron. K10 = finishing, K20 = general purpose, K30 = roughing. Wear-resistant grades for abrasive cast iron.
• ISO N (Green): Non-ferrous (aluminium, copper, brass). Sharp, polished edges. Often uncoated or with thin diamond coatings. PCD preferred for high volume.
• ISO S (Brown): Superalloys and titanium (HRSA - Heat Resistant Super Alloys). Tough substrates with heat-resistant coatings (AlTiN, TiAlN). Low speeds, moderate feeds.
• ISO H (Grey): Hardened materials (45-65 HRC). CBN or ceramic grades. Used for hard turning instead of grinding.

How to use this Carbide Grade Cross Reference Chart

Use this reference to navigate carbide grade designations. Start with the material's ISO group (P/M/K/N/S/H), then select a grade based on the operation (finishing vs roughing). When cross-referencing, compare the ISO classification ranges, not just the manufacturer's marketing name.