ISO 18203:2016 specifies a method of measuring the case hardening depth, surface hardening depth, nitriding hardness depth and total thickness of surface hardening depth obtained, e.g. thermal (flame and induction hardening, electron beam hardening, laser beam hardening, etc.) or thermochemical (carbonitriding, carburizing and hardening, hardening and nitriding, etc.) treatment.
EN ISO 18203:2022 history
2022EN ISO 18203:2022 Steel - Determination of the thickness of surface-hardened layers (ISO 18203:2016)