Rockwell test blocks are calibrated in accordance with ASTM E18 and ISO 6508, using NIST Rockwell HRC standard reference materials. They are used primarily for the indirect verification and daily verification of a Rockwell hardness tester. Reference test blocks are also useful when comparing the relative performance between two hardness testers by measuring the same blocks on both machines or for comparing the performance of two indenters. Proper care, handling and use of the reference test blocks is important to obtaining accurate measurements. It is critical that the reference test blocks not influence the hardness measurements due to improper use

    Superior accuracy and ease of testing for the operator
    Special heat treat process insures maximum consistency and repeatability

Order No	Hardness	Diameter (mm)	Weight(kg)
HABL-11001	60-70HRC	Ф60×Ф10*10mm	0.2
HABL-11002	50-55HRC	Ф60×Ф10*10mm	0.2
HABL-11003	40-50HRC	Ф60×Ф10*10mm	0.2
HABL-11004	30-35HRC	Ф60×Ф10*10mm	0.2
HABL-11005	20-30HRC	Ф60×Ф10*10mm	0.2
HABL-11006	70-85HRCA	Ф60×Ф10*10mm	0.2
HABL-11007	60-70HRA	Ф60×Ф10*10mm	0.2
HABL-11008	85-95HRBW	Ф60×Ф10*10mm	0.2
HABL-11009	60-70HRBW	Ф60×Ф10*10mm	0.2