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
|