Enter the Brinell Hardness and the constant values into the calculator to determine the Rockwell C Hardness.
| HBW to HRC | HRC to HBW |
|---|---|
| 150 HBW = 2.11 HRC | 20 HRC = 226 HBW |
| 200 HBW = 15.05 HRC | 25 HRC = 253 HBW |
| 225 HBW = 20.04 HRC | 30 HRC = 286 HBW |
| 250 HBW = 24.39 HRC | 32 HRC = 301 HBW |
| 300 HBW = 31.76 HRC | 35 HRC = 327 HBW |
| 350 HBW = 37.84 HRC | 38 HRC = 353 HBW |
| 400 HBW = 43.00 HRC | 40 HRC = 371 HBW |
| 450 HBW = 47.43 HRC | 45 HRC = 421 HBW |
| 500 HBW = 51.24 HRC | 50 HRC = 481 HBW |
| 600 HBW = 57.26 HRC | 55 HRC = 560 HBW |
| HBW→HRC uses the ASTM E140 polynomial fit; HRC→HBW is the numerical inversion of that relationship. Valid range: 145 ≤ HBW ≤ 627 (≈ 0.49–58.56 HRC). | |
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Hbw To Hrc Formula
The following formula is used to calculate the hardness conversion from Brinell Hardness (HBW) to Rockwell C Hardness (HRC).
Variables:
- HRC is the Rockwell C Hardness
- HBW is the Brinell Hardness
To calculate the Rockwell C Hardness, multiply the Brinell Hardness by 0.102 and then add 1.24 to the result. This is a linear approximation and the true formula can be seen above.
What is a Hbw To Hrc?
HBW to HRC refers to the conversion from Hardness Brinell (HBW) to Hardness Rockwell C (HRC), which are both measurements of hardness in materials. The Brinell hardness test involves applying a known load to the surface of the material through a hardened steel ball of known diameter, while the Rockwell hardness test uses a different method involving a small indentation. The conversion between these two scales allows for comparison and understanding of material properties across different testing methods.
