Rockwell Hardness Standard Test Blocks
Rockwell Hardness Standard Test Blocks certified. Free NIST traceable long form certificate with every Rockwell test block
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Rockwell Hardness Standard Test Blocks
- Rockwell Type Hardness Standards For determining the accuracy of your hardness tester.
Typical Application of Rockwell Hardness Testing Scales
HRA - Cemented carbides, thin steel and shallow case hardened steel
HRB - Copper alloys, soft steels, aluminum alloys, malleable irons, etc.
HRC - Steel, hard cast irons, case hardened steel and other materials harder than 100 HRB
HRD - Thin steel and medium case hardened steel and pearlitic malleable iron
HRE - Cast iron, aluminum and magnesium alloys, bearing metals
HRF - Annealed copper alloys, thin soft sheet metals
HRG - Phosphor bronze, beryllium copper, malleable irons HRH . . . . Aluminum, zinc, lead
HRK - Phosphor bronze, beryllium copper, malleable irons HRH . . . . Aluminum, zinc, lead
HRL - Phosphor bronze, beryllium copper, malleable irons HRH . . . . Aluminum, zinc, lead
HRM - Soft bearing metals, plastics and other very soft materials
HRP - Soft bearing metals, plastics and other very soft materials
HRR - Soft bearing metals, plastics and other very soft materials
HRS - Soft bearing metals, plastics and other very soft materials
HRV - Soft bearing metals, plastics and other very soft materials
Rockwell Test Blocks:
- 'A' Scale Test Blocks
- 'B' Scale Test Blocks
- 'C' Scale Test Blocks
- 'D' Scale Test Blocks
- 'E' Scale Test Blocks
- 'F' Scale Test Blocks
- 'G' Scale Test Blocks
- 'H' Scale Test Blocks
- 'K' Scale Test Blocks
A Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRA 28.5 | A Scale Rockwell Test Block – | 28.5 Range |
| HRA 33 | A Scale Rockwell Test Block – | 33 Range |
| HRA 37.5 | A Scale Rockwell Test Block – | 37.5 Range |
| HRA 41.5 | A Scale Rockwell Test Block – | 41.5 Range |
| HRA 46.5 | A Scale Rockwell Test Block – | 46.5 Range |
| HRA 52.5 | A Scale Rockwell Test Block – | 52.5 Range |
| HRA 55.5 | A Scale Rockwell Test Block – | 55.5 Range |
| HRA 63 | A Scale Rockwell Test Block – | 63 Range |
| HRA 68 | A Scale Rockwell Test Block – | 68 Range |
| HRA 73 | A Scale Rockwell Test Block – | 73 Range |
| HRA 78.5 | A Scale Rockwell Test Block – | 78.5 Range |
| HRA 83 | A Scale Rockwell Test Block – | 80 Range |
B Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRBW 0 | B Scale Rockwell Test Block – | 0 Range |
| HRBW 10 | B Scale Rockwell Test Block – | 10 Range |
| HRBW 25 | B Scale Rockwell Test Block – | 25 Range |
| HRBW 35 | B Scale Rockwell Test Block – | 35 Range |
| HRBW 45 | B Scale Rockwell Test Block – | 45 Range |
| HRBW 55 | B Scale Rockwell Test Block – | 55 Range |
| HRBW 65 | B Scale Rockwell Test Block – | 65 Range |
| HRBW 75 | B Scale Rockwell Test Block – | 75 Range |
| HRBW 85 | B Scale Rockwell Test Block – | 85 Range |
| HRBW 95 | B Scale Rockwell Test Block – | 95 Range |
C Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRC 25 | C Scale Rockwell Test Block – | 25 Range |
| HRC 35 | C Scale Rockwell Test Block – | 35 Range |
| HRC 45 | C Scale Rockwell Test Block – | 45 Range |
| HRC 55 | C Scale Rockwell Test Block – | 55 Range |
| HRC 60 | C Scale Rockwell Test Block – | 60 Range |
| HRC 63 | C Scale Rockwell Test Block – | 63 Range |
D Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRD 44 | D Scale Rockwell Test Block – | 44 Range |
| HRD 51.5 | D Scale Rockwell Test Block – | 51.5 Range |
| HRD 59 | D Scale Rockwell Test Block – | 59 Range |
| HRD 67 | D Scale Rockwell Test Block – | 67 Range |
| HRD 73 | D Scale Rockwell Test Block – | 73 Range |
E Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRE 57 | E Scale Rockwell Test Block – | 57 Range |
| HRE 62.5 | E Scale Rockwell Test Block – | 62.5 Range |
| HRE 68.5 | E Scale Rockwell Test Block – | 68.5 Range |
| HRE 75 | E Scale Rockwell Test Block – | 75 Range |
| HRE 78 | E Scale Rockwell Test Block – | 78 Range |
| HRE 84 | E Scale Rockwell Test Block – | 84 Range |
| HRE 90 | E Scale Rockwell Test Block – | 90 Range |
| HRE 96 | E Scale Rockwell Test Block – | 96 Range |
F Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRF 57 | F Scale Rockwell Test Block – | 57 Range |
| HRF 63 | F Scale Rockwell Test Block – | 63 Range |
| HRF 68.5 | F Scale Rockwell Test Block – | 68.5 Range |
| HRF 74 | F Scale Rockwell Test Block – | 74 Range |
| HRF 77 | F Scale Rockwell Test Block – | 77 Range |
| HRF 82.5 | F Scale Rockwell Test Block – | 82.5 Range |
| HRF 88 | F Scale Rockwell Test Block – | 88 Range |
| HRF 94 | F Scale Rockwell Test Block – | 94 Range |
| HRF 99.5 | F Scale Rockwell Test Block – | 99.5 Range |
G Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRG 10 | G Scale Rockwell Test Block – | 10 Range |
| HRG 25 | G Scale Rockwell Test Block – | 25 Range |
| HRG 41 | G Scale Rockwell Test Block – | 41 Range |
| HRG 57.5 | G Scale Rockwell Test Block – | 57.5 Range |
| HRG 66 | G Scale Rockwell Test Block – | 66 Range |
H Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRH 87 | H Scale Rockwell Test Block – | 87 Range |
| HRH 90.5 | H Scale Rockwell Test Block – | 90.5 Range |
| HRH 94 | H Scale Rockwell Test Block – | 94 Range |
| HRH 99.5 | H Scale Rockwell Test Block – | 99.5 Range |
K Scale Hardness Standards:
| Part # | Description | Range |
|---|---|---|
| HRK 21 | K Scale Rockwell Test Block – | 21 Range |
| HRK 30 | K Scale Rockwell Test Block – | 30 Range |
| HRK 38 | K Scale Rockwell Test Block – | 38 Range |
| HRK 47 | K Scale Rockwell Test Block – | 47 Range |
| HRK 51.5 | K Scale Rockwell Test Block – | 51.5 Range |
| HRK 60 | K Scale Rockwell Test Block – | 60 Range |
| HRK 68.5 | K Scale Rockwell Test Block – | 68.5 Range |
| HRK 77.5 | K Scale Rockwell Test Block – | 77.5 Range |
| HRK 86 | K Scale Rockwell Test Block – | 86 Range |
| HRK 94.5 | K Scale Rockwell Test Block – | 94.5 Range |
| HRK 98.5 | K Scale Rockwell Test Block – | 98.5 Range |
