本文件提供了一种推荐的实践方法，用于确定热处理碳钢和低合金钢零件（表面硬化零件除外）的脱碳和渗碳。不适用于原材料。

This document provides a recommended practice for determining decarburization and carburization in heat treated carbon and low-alloy steel parts other than case hardened parts. It is not applicable to raw materials.