One important outcome of our linearity study is extremely simple formula which describes the non-linearity of the Rockwell hardness scale for a wide range of HRC numbers.
The curve in the graph showing the percentage increase of hardness (PIOH) between two following hardness numbers can be described by simple formula
PIOF (percentage increase of hardness) = 200 / (100 – HRC)
Question: What is the percentage increase of Rockwell hardness for a blade 60 HRC?
Answer: PIOF (percentage increase of hardness) = 200 / (100 – 60) = 5 %
![[Image: Percentage%20change%20of%20hardness.jpg?dl=1]](https://www.dropbox.com/s/9y2nggknbxzb7tr/Percentage%20change%20of%20hardness.jpg?dl=1)
We have not found this formula in the huge amount of recherchéd papers and so we hope we were the first who derived it. The range of our formula outperforms known hardness conversion calculators.
Jan
The curve in the graph showing the percentage increase of hardness (PIOH) between two following hardness numbers can be described by simple formula
PIOF (percentage increase of hardness) = 200 / (100 – HRC)
Question: What is the percentage increase of Rockwell hardness for a blade 60 HRC?
Answer: PIOF (percentage increase of hardness) = 200 / (100 – 60) = 5 %
We have not found this formula in the huge amount of recherchéd papers and so we hope we were the first who derived it. The range of our formula outperforms known hardness conversion calculators.
Jan