指定维氏/布氏硬度标尺（钢球和硬质合金球）和维氏/洛氏硬度标尺（标尺A、B、C和D）的转换带。该转换带仅适用于结构均匀且厚度等于或大于相关试验标准中给出数值的产品的非合金钢和低合金钢。如有争议，应使用硬度试验获得的硬度值。转换后的硬度值不得用作拒收钢材的依据。

Specifies conversion bands for hardness scales for Vickers/Brinell (steel ball and hardmetal ball), and Vickers/Rockwell (scales A, B, C and D). This conversion bands only apply to non-alloy and low-alloy steels for products of homogeneous structure and of thickness equal to or greater than the figure given in the relevant test standard. In cases of dispute the hardness value obtained from the hardness test should be used. Converted hardness values shall not be used as a basis for rejection of the steel.