JIS G 0559:2019 PDF Download

This Standard specifies a method of measuring the case depth after flame hardening or induction hardening for steel of, as a rule, over 0.3 mm in thickness (hereafter referred to as the case depth).

However, it is applicable to the measurement of case depth of 0.3 mm or under by agreement between the parties concerned.

NOTE The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 18203:2016 Steel—Determination of the thickness of surface-hardened layers (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/ IEC Guide 21-1.