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Material | Hardness method | Impact device | |||||
D/DC | D+15 | C | G | E | DL | ||
Steel and cast steel | HRC | 17.9~68.5 | 19.3~67.9 | 20.0~69.5 | | 22.4~70.7 | 20.6~68.2 |
HRB | 59.6~99.6 | | | 47.7~99.9 | | 37.0~99.9 | |
HRA | 59.1~85.8 | | | | 61.7~88.0 | | |
HB | 127~651 | 80~638 | 80~683 | 90~646 | 83~663 | 81~646 | |
HV | 83~976 | 80~937 | 80~996 | | 84~1042 | 80~950 | |
HS | 32.2~99.5 | 33.3~99.3 | 31.8~102.1 | | 35.8~102.6 | 30.6~96.8 | |
Hammered steel | HB | 143~650 | | | | | |
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 | | | | | | |
Gray cast iron | HRC | | | | | | |
HB | 93~334 | | | 92~326 | | | |
HV | | | | | | | |
Nodular cast iron | HRC | | | | | | |
HB | 131~387 | | | 127~364 | | | |
HV | | | | | | | |
Cast aluminum alloys | HB | 19~164 | | 23~210 | 32~168 | | |
HRB | 23.8~84.6 | | 22.7~85.0 | 23.8~85.5 | | | |
Brass(copper-zinc alloys) | HB | 40~173 | | | | | |
HRB | 13.5~95.3 | | | | | | |
Bronze (copper-aluminum/copper-tin alloys) | HB | 60~290 | | | | | |
Wrought copper alloys | HB | 45~315 | | | | | |
No. | Material | HLD | Strength σb(Mpa) |
1 | Mild steel | 350~522 | 374~780 |
2 | High-carbon steel | 500~710 | 737~1670 |
3 | Cr steel | 500~730 | 707~1829 |
4 | Cr-V steel | 500~750 | 704~1980 |
5 | Cr-Ni steel | 500~750 | 763~2007 |
6 | Cr-Mo steel | 500~738 | 721~1875 |
7 | Cr-Ni-Mo steel | 540~738 | 844~1933 |
8 | Cr-Mn-Si steel | 500~750 | 755~1993 |
9 | Super strength steel | 630~800 | 1180~2652 |
10 | Stainless steel | 500~710 | 703~1676 |