金属材料 硬度试验 洛氏硬度试验(A-B-C-D-E-F-G-H-K级) ISO 6508 - 1986

　　This International Standard specifies the method for the Rockwell hardness test (scales and field of application according to table 1) for metallic materials.

　　For specific materials and/or products, particular International Standards exist (see clause 2).

　　NOTE - For certain materials, the fields of application may be narrower than those indicated.