Features
The David L. Ellis Co., Inc. offers two types of gridded blocks for Rockwell test blocks
Square Pattern
The block has a grid pattern on the whole block. The problem with the design is soft blocks make larger indents and won’t always meet ASTM E18-17e1 for distance between another indent and the edge. To solve this problem, use every other square.
Circle Pattern
This design will solve the problem of distance between indents to meet the standard. Some customers complained that too much space was wasted. But this is the rule of ASTM E18-17e1.
Specifications
Rockwell Regular Hardness Test Block
| Part No | 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 |
| 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 |
Rockwell Superficial Hardness Test Block
| Part No | 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 |
US 1154 
CN 319 
MY 309 
AP 178 
DE 79 
AU 72 
CA 64 
GB 53 
