ISO 2639:1982

Steel — Determination and verification of the effective depth of carburized and hardened cases

Defines the effective case depth, and specifies methods for the determination of this depth, in steel. Is applicable to carburized cases and carbo-nitrided cases, the depth of which is greater than 0,3 mm, and parts which have a hardness of less than 450 HV at a distance of 3 X the effective case depth from the surface.