超硬グレード相互参照

International carbide grade classification systems

Every carbide manufacturer uses their own grade designations, but all can be mapped to the ISO classification system. This reference explains the ISO, ANSI (C-class), DIN, and JIS systems, helping you find equivalent grades across different standards and manufacturers.

• ISO System (ISO 513): P (steel), M (stainless), K (cast iron), N (non-ferrous), S (superalloys), H (hardened). Two-digit number indicates wear/toughness balance: 01-10 = very hard/wear resistant (finishing), 20-30 = balanced (general purpose), 40-50 = tough (roughing).
• ANSI C-Class System (US - older): C1-C4 for cast iron (C1 = roughing, C4 = finishing). C5-C8 for steel (C5 = roughing, C8 = finishing). Still found on older drawings and procurement specs.
• DIN System (Germany): P01-P50, M10-M40, K01-K40, etc. Compatible with ISO. Numeric codes indicate application. Often used with manufacturer prefix (e.g., Widia TTR, TTM series).
• JIS System (Japan): Same categories as ISO. Japanese manufacturers (Mitsubishi, Sumitomo, Tungalow) use proprietary names but always state ISO equivalence.

How to use this Carbide Grade Cross Reference Guide

Identify the material ISO group (P/M/K/N/S/H) and the operation type (finishing/general/roughing). Cross-reference between standards using the ISO code as the common language. For critical applications, always verify equivalent grades with a test cut -- nominal equivalences can differ in actual performance.