1. Metallic Materials, Vickers Hardness Test;ISO 6507,2016
2. Standard Test Method for Microindentation Hardness of Materials;ASTM E384,2017
3. Metallic Materials-Knoop Hardness Test;ISO 4545,2015
4. Metallic Materials-Rockwell Hardness Test;ISO 6508,2015
5. Standard Test Methods for Rockwell Hardness of Metallic Materials;ASTM E18,2017