Grade A hardness blocks
| Name | Specification | External dimensions /MM | Picture |
| Grade A standard Rockwell hardness test block (ASTM) |
60–70HRC | φ64X10 0.3 kg/block mirror surface |
 |
| 35–55HRC | |||
| 20–30HRC | |||
| 60–70HRA | |||
| 70–85HRA | |||
| 85–95HRBW | |||
| Grade A standard superficial Rockwell hardness test block (ASTM) |
88–92HR15N | φ64X10 0.3 kg/block mirror surface |
 |
| 74–82HR30N | |||
| 45–55HR30N | |||
| 45–55HR45N | |||
| 85–91HR15TW | |||
| 70–80HR30TW | |||
| 54–72HR45TW | |||
| Grade A standard Rockwell hardness test block (ASTM) |
150–250HBW10/3000 | φ 90×16 or φ65×10 0.85 kg/block or 0.3 kg/block mirror surface |
 |
| 150–250HBW5/750 | |||
| 150–250HBW2.5/187.5 | |||
| 75–125HBW10/1000 | |||
| 75–125HBW5/250 | |||
| 75–125HBW2.5/62.5 | |||
| AA Grade Standard Rockwell Hardness Test Block |
60-70HRC | square 51x51x10 0.3KG/block Mirror surface |
 |
| 35-55HRC | |||
| 20-30HRC | |||
| 60-70HRA | |||
| 70-85HRA | |||
| 85-95HRBW | |||
| AA Grade Standard Surface Rockwell Hardness Test Block (ASTM) |
88-92HR15N | square 51x51x10 0.3kg/block Mirror surface |
 |
| 74-82HR30N | |||
| 45-55HR30N | |||
| 45-55HR45N | |||
| 85-91HR15TW | |||
| 70-80HR30TW | |||
| 54-72HR45TW | |||
| Grade AA Standard Brinell Hardness Test Block (ASTM) |
150-250HBW10/3000 | 153x65x20 1.4kg/block |
 |
| 150-250HBW5/750 | |||
| 75-125HBW10/1000 | |||
| 75-125HBW5/250 | |||
| Grade AA Standard Vickers Hardness Test Block (ASTM) |
700-800HV3 | Square 51x51x10 0.3kg/block Mirror surface |
 |
| 700-800HV5 | |||
| 700-800HV10 | |||
| 700-800HV30 | |||
| 700-800HV50 | |||
| 400-600HV5 | |||
| 400-600HV10 | |||
| 400-600HV30 | |||
| 175-225HV5 |
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