Certified master hardness reference test blocks for Rockwell scales, calibrated by an ISO/IEC 17025 accredited laboratory (ANAB, AC 3026.01) and covered by the ILAC-MRA. Each block is supplied with a calibration certificate compliant with ASTM standards and includes an additional ISO certificate. Mirror-finished test surface.
Select the hardness scale and range from the options. Scales marked “(made to order)” are produced on demand with a delivery time of approximately 30 days.
Prices are ex-works; shipping is charged separately. Payment by bank transfer at the time of ordering.
Learn more about our certified hardness test blocks
Learn more about the method: Rockwell hardness testing guide · Rockwell test theory (ASTM E18 / ISO 6508)
The regular Rockwell scales HRA, HRB, HRC, HRD, HRE and HRF, each available in up to three certified hardness ranges. For the superficial scales (HR15N to HR45T) see the dedicated Rockwell Superficial product.
Each block measures Ø 60 × 10 mm and weighs 0.2 kg, with a mirror-finished test surface. The HRB block in the 20–50 range has a square 50 × 50 mm shape.
Every block is calibrated by an ISO/IEC 17025 accredited laboratory (ANAB, AC 3026.01) and the calibration is covered by the ILAC-MRA. The certificate complies with ASTM standards and an additional ISO certificate is included.
Select the hardness scale and then the hardness range you need from the drop-down menu. Each option corresponds to one certified master reference block within that range.
Prices are ex-works and shipping is charged separately. Payment is made by bank transfer at the time of ordering. Scales marked as made to order are produced on demand with a delivery time of approximately 30 days.
