The subject of hardness and hardness measurement practice is, simply said, a mature technology. This paper will provide a glimpse of the prevailing practices in the fastener industry and share the experiences in the hope that the use of material hardness results will be used in an appropriate manner.
The use of hardness measuring technique has come a long way. This technique has been integrated into many processes as part of the controls in manufacturing.
For fasteners and hardware, hardness testing is the more economical test process during manufacturing. The test is directly at parts, non-destructive and relatively straight forward. Overall process management, it is more convenient compared to tensile test.
After a short preface, the following topics are described in detail in the professional white paper by Francis Khoo from the Bossard Expert Team: