JIS G 0557:2019规定了在淬火后通过渗碳或碳氮共渗处理硬化的钢的表面深度的测量方法（以下简称表面深度）。附录A中规定了确定有效外壳深度的插值方法。

JIS G 0557:2019 specifies the methods of measuring the case depth of steel hardened by carburizing or carbonitriding treatment followed by quenching (hereafter referred to as the case depth). The interpolation method for determining effective case depth is specified in Annex A.