Specification :

Material Method Impact device
D/ DC D+ 15 C G E DL
Steel and cast steel
HRC 20^ 68.5 19.3^ 67.9 20.0^ 69.5 22.4^ 70.7 20.6^ 68.2
HRB 38.4^ 99.6 4 7.7^ 99.9 37.0^ 99.9
HRA 59.1^ 85.8 61.7^ 88.0
HB 127^ 651 80^ 638 80^ 683 90^ 6 46 83^ 663 81^ 646
HV 83^ 976 80^ 937 80^ 996 84^ 1042 80^ 950
HS 32.2^ 99.5 33.3^ 9 9.3 31.8^ 102.1 35.8^ 102.6 30.6^ 96.8
Cold work
tool steel HRC 20.4^ 67.1 19.8^ 68.2 20.7^ 68.2 22.6^ 70.2
HV 80^ 898 80^ 935 100^ 941 82^ 1009
Stainless steel
HRB 46.5^ 101.7
HB 85^ 655
HV 85^ 802
Grey cast iron
HRC
HB 93^ 334 92^ 326
HV
Nodular cast iron HRC
HB 131^ 387 127^ 364
HV
Cast aluminium alloys HB 19^ 164 23^ 210 32^ 168
HRB 23.8^ 84.6 22.7^ 85.0 23.8^ 85.5
BRASS( cop per-zinc alloys)
HB 40^ 173
HRB 13.5^ 95.3
BRONZE( copper-aluminium/ tin alloys) HB 60^ 290
Wrought copper alloys HB 45^ 315
Available type of impact device DC: Test hole or hollow cylindrical
D+ 15:
Test groove or reentrant surface
C: Test small, light, thin parts and surface of hardened layer
G:
Test large, thick, heavy and rough surface steel E: Test super high hardness material DL: Test slender narrow groove or hole