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APPENDIX 1: HARDNESS CONVERSION VALIDITY RANGES
Material
Cold work tool steel (C2)
High speed steel (D2/4)
Hard metal (E2)
Nickel and High-Nickel
Alloys (F1)
Cartridge Brass (F2)
Copper (F3)
(strips excluded)
Wrought Aluminum
Products (F4)
Aluminum and aluminum
alloys (F5)
Tool steel 1.1243 (G1)
from
580 HV
59.5 HR45N
210 HV
205 HB
220 HV
18.8 HRC
210 HV
95.6 HRB
210 HV 110.7 HRF
220 HV
59.4 HRA
220 HV
16.4 HR45N
589 HV
54.2 HRC
589 HV
77.9 HRA
589 HV
58.8 HR45N
780 HV
82.5 HRA
77 HV
77 HB
164 HV
2.0 HRC
77 HV
30.0 HRB
119 HV
136 HK
77 HV
73.0 HRF
112 HV
39.0 HRA
112 HV
8.0 HRD
171 HV
2.0 HR45N
77 HV
70.0 HRE
45 HV
42 HB
60 HV
10.0 HRB
45 HV
40.0 HRF
40 HV
42.8 HK 0.5
40 HV
40.2 HK 1
44 HV
40 HB
80 HV
28.0 HRB
44 HV
46.0 HRE
18 HV
17.1 HB
80 HV
31.9 HRB
305 HV
297 HB
305 HV
31.2 HRC
to
720 HV
66.4 HR45N
620 HV
600 HB
840 HV
65.8 HRC
340 HV 109.5 HRB
340 HV 118.6 HRF
840 HV
84.5 HRA
840 HV
72.4 HR45N
935 HV
67.6 HRC
935 HV
85.5 HRA
935 HV
74.2 HR45N
1760 HV
93.2 HRA
513 HV
479 HB
513 HV
50.0 HRC
309 HV
106 HRB
382 HV
436 HK
309 HV 116.5 HRF
513 HV
75.5 HRA
513 HV
63.0 HRD
513 HV
54.4 HR45N
188 HV 108.5 HRE
196 HV
169 HB
196 HV
93.5 HRB
196 HV 110.0 HRF
130 HV 133.8 HK 0.5
130 HV 138.7 HK 1
189 HV
160 HB
189 HV
91.0 HRB
135 HV 101.0 HRE
210 HV 199.5 HB
210 HV
95.7 HRB
474 HV
474 HB
474 HV
48.0 HRC
45
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