MITECH MH320 - Appendix

22
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APPENDIX
Table 1
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
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
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 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(coppe
r-aluminum/tin
alloys)
HB
60～290
Wrought copper
alloys
HB
45～315
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