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We offer the largest Hardness Test Block selection in the industry. If you don't see what you're looking for — Ask! All of our Hardness Test Blocks come with Accreditation. All the blocks are calibrated and accredited to ISO guide 25 and will meet automotive and aerospace standards. The HRC test blocks are calibrated on the new NIST level.
View a Sample Certificate (click to view PDF):
Rockwell Hardness Test Blocks
ASTM E-18 / ISO 6508
Limited availability of round test blocks in HRC Scale. Please call for details.
Regular Scales
| Scale | Penetrator | Load |
|---|---|---|
| HRA | C Diamond | 60 Kg |
| HRA | A Diamond (Carbide) | 60 Kg |
| HRBW | 1/16" Ball | 100 Kg |
| HRC | C Diamond | 150 Kg |
| HRD | C Diamond | 100 Kg |
| HREW | 1/8" Ball | 100 Kg |
| HRFW | 1/16" Ball | 60 Kg |
| HRGW | 1/16" Ball | 150 Kg |
| HRHW | 1/8" Ball | 60 Kg |
| HRKW | 1/8" Ball | 150 Kg |
| HRLW | 1/8" Ball | 60 Kg |
| HRMW | 1/4" Ball | 100 Kg |
| HRPW | 1/4" Ball | 150 Kg |
| HRRW | 1/2" Ball | 60 Kg |
| HRSW | 1/2" Ball | 100 Kg |
| HRVW | 1/2" Ball | 150 Kg |
Superficial Scales
| Scale | Penetrator | Load |
|---|---|---|
| 15N | N Diamond | 15 Kg |
| 30N | N Diamond | 30 Kg |
| 45N | N Diamond | 45 Kg |
| 15TW | 1/16" Ball | 15 Kg |
| 30TW | 1/16" Ball | 30 Kg |
| 45TW | 1/16" Ball | 45 Kg |
| 15WW | 1/8" Ball | 15 Kg |
| 30WW | 1/8" Ball | 30 Kg |
| 45WW | 1/8" Ball | 45 Kg |
| 15XW | 1/4" Ball | 15 Kg |
| 30XW | 1/4" Ball | 30 Kg |
| 45XW | 1/4" Ball | 45 Kg |
| 15YW | 1/2" Ball | 15 Kg |
| 30YW | 1/2" Ball | 30 Kg |
| 45YW | 1/2" Ball | 45 Kg |
Don't see what you need?
We stock the most hardness ranges in all scales available. Call or email us — we'll find the right block for your application.