Testing Capabilities


Standard Rockwell Scales


Scale

Indenter

Preliminary
Force
P (kgf)

Total
Test Force
F (kgf)

Application

HRA Diamond

10

60

Cemented carbides, thin steel, shallow case-hardened steel
HRB Ball 1/16” dia.

10

100

Cu and Al alloys; soft steels, malleable iron, annealed low C steels, etc.
HRC Diamond

10

150

Hard steels, hard cast irons, pearlitic malleable iron, titanium, deep case-hardened steel, etc.
HRD Diamond

10

100

Thin hard steel, med. case-hardened steel, and pearlitic malleable iron
HRE Ball 1/8” dia.

10

100

Al and Mg alloys; cast iron, bearing metals
HRF Ball 1/16” dia.

10

60

Annealed Cu alloys, thin soft sheet metals
HRG Ball 1/16” dia.

10

150

Bronze (Cu-Ni-Zn and Cu-Ni alloys), malleable irons
HRH Ball 1/8” dia.

10

60

Soft materials, high ferritic, Al, Pb, Zn
HRK Ball 1/8” dia.

10

150

Bearing metals and other very soft or thin materials, such as thermoplastics, thermosets, rubbers
HRL Ball ¼” dia.

10

60

HRM Ball ¼” dia.

10

100

HRP Ball ¼” dia.

10

150

HRR Ball ½” dia.

10

60

HRS Ball ½” dia.

10

100

HRV Ball ½” dia.

10

150

HR 15N Diamond

3

15

Rockwell superficial scales are used to test materials too thin for the regular scales.  Generally, the diamond indenter are used for hard materials, and ball indenters are used on soft material
Hardness tests used for thin sheets,
foils, coatings, surface heat
treatments, and polymers including
their surface treatments
HR 30N Diamond

3

30

HR 45N Diamond

3

45

HR 15T Ball 1/16” dia.

3

15

HR 30T Ball 1/16” dia.

3

30

HR 45T Ball 1/16” dia.

3

45

HR 15W Ball 1/8” dia.

3

15

HR 30W Ball 1/8” dia.

3

30

HR 45W Ball 1/8” dia.

3

45

HR 15X Ball ¼” dia.

3

15

HR 30X Ball ¼” dia.

3

30

HR 45X Ball ¼” dia.

3

45

HR 15Y Ball ½” dia.

3

15

HR 30Y Ball ½” dia.

3

30

HR 45Y Ball ½” dia.

3

45


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