The accuracy, stability and consistency of Sun-Tec Hardness Standards result in a reliable method of verifying your hardness tester.
Manufactured in the U.S.A. and calibrated in the Sun-Tec standardization laboratory to NIST or ASTM Standards, Sun-Tec Hardness Standards help maintain and assure the accuracy of your Hardness Tester.
Test Sets are made up of 3 Standards and a master-indenter. Click here for individual Rockwell Standards and here for individual indenters.
Note: Specify hardness range and scale when requesting quote – i.e.: 65 HRC

Calibration test sets are sold as sets of 3 standards of the same material.
All sets are ASTEM E18 Compliant.
| Available Rockwell Calibration Test Sets | |
| Rockwell Test Sets | HR15N |
| HR15Tw | |
| HR30N | |
| HR30Tw | |
| HR45N | |
| HR45Tw | |
| HRA | |
| HRBw | |
| HRC | |
| HREw | |
| HRFw | |

Each Sun-Tec Rockwell Calibration Test Set Includes: