HFRR astm d6079 upper and lower test specimens

Pacific Sensor’s HFRR test specimens meet the requirements of ASTM D6079, ASTM D7688, CEC F-06-A, ISO 12156, EN 590, JPI-5S-50 and IP 450. A certificate of conformity is included in every shipment.

Upper Specimen – 6mm Ball

Material              E52100 Steel

Hardness            58-66 HRC

Grade                   G28

Surface Finish     Ra < 0.05 μm

Lower Specimen – 10mm Disc

Material              E52100 Steel

Hardness            HV30 Number 190-210

Surface Finish    Ra < 0.02 μm