ROCKWELL HARDNESS TEST BLOCKS Made in U.S.A.

Manufactured from the highest quality steel with a special heat treat and cold treat

process which insures maximum consistency and repeatability.

Accuracy exceeds ASTM E10, E18, E92 and E384 standards.

I. ROCKWELL CERTIFIED TEST BLOCKS

“A” SCALE

Model No.

A-Diamond 60 kg

20520

HRA 28.5

20521

HRA 33

20522

HRA 37.5

20523

HRA 41.5

20524

HRA 46.5

20525

HRA 52.5

20526

HRA 55.5

20527

HRA 63

20528

HRA 68

20529

HRA 73

20530

HRA 78.5

20531

HRA 83

“B” SCALE

Model No.

1/16 Ball 100 kg

20532

HRB 35

20533

HRB 45

20534

HRB 55

20535

HRB 65

20536

HRB 75

20537

HRB 85

20538

HRB 95

“C” SCALE
Model No.

C-Diamond 150 kg

20539

HRC 25

20540

HRC 35

20541

HRC 45

20542

HRC 55

20543

HRC 60

20544

HRC 63

“15N” SCALE

Model No.

N-Diamond 15 kg

20545

HR15N 72

20546

HR15N 78

20547

HR15N 83

20548

HR15N 88

20549

HR15N 91.5