Conversion of hardness-to-hardness or hardness-to-tensile-strength values for unalloyed and low-alloy steels and cast iron.
Based on ISO 18265-2003
Hardness conversion
| Valid range | |||
| Tensile strength | N/mm² | 255 - 2180 | |
| Vickers hardness | HV10 | 80 - 940 | |
| Brinell hardness | HB | 76 - 618 | |
| Rockwell hardness | HRB | 41 - 105 | |
| Rockwell hardness | HRF | 82.6 - 115.1 | |
| Rockwell hardness | HRC | 20.3 - 68 | |
| Rockwell hardness | HRA | 60.7 - 85.6 | |
| Rockwell hardness | HRD | 40.3 - 76.9 | |
| Rockwell hardness | HR15N | 69.6 - 93.2 | |
| Rockwell hardness | HR30N | 41.7 - 84.4 | |
| Rockwell hardness | HR45N | 19.9 - 75.4 |
This application is based on ISO 18265-2003:
Metallic materials, conversion of hardness values.
Verify your calculation, maximize potential of your product.
 Could you or your engineering team use a refresher course on fastening technology? Visit Bossard Expert Education for available engineering seminars to consider! |
 Want to verify your products are meeting quality standards? Test in one of our 14 certified testing laboratories worldwide (3 with a ISO/IEC 17025 certification). |
We help you master the science of fastening!
New look. Same high-quality content. Our white papers on the science of fastening got a makeover! Check out the brand new design:
Download now your full white paper written by our Assembly Technology Expert Team for free!
Download now the App for your Mobile Device here:
Bossard's online calculators and converters are available as practical app. Visit the iOS App Store or the Google Play Store.
Your local contact