| Subsurface Brinell Hardness Standard Blocks | |
| Type | Dimensions |
| 150-250HBW10/3000 (Subsurface ) | Ring |
| 150-250HBW5/750 (Subsurface ) | |
| 150-250HBW2.5/187.5 (Subsurface ) | Ф90mm×Ф12mm×16mm |
| 75-125HBW10/1000 (Subsurface ) | or |
| 75-125 HBW5/250 (Subsurface ) | 60mm×40mm×10mm |
| 75-125HBW2.5/62.5 (Subsurface ) | 0.85 kg Each |
| 250-350HBW10/3000 (Subsurface ) | |
| 250-350HBW5/750 (Subsurface ) | Subsurface |
| 250-350HBW2.5/187.5 (Subsurface ) | |
| 150-250HBW1/30 | |