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APPENDIX 1: HARDNESS CONVERSION VALIDITY RANGES
Material
Copper (7)
(strips excluded)
Alloyed White Irons (8)
Wrought Aluminum
Products (9)
from
40 HV
42.8 HK 0.5
40 HV
40.2 HK 1
380 HV
357 HB
380 HV
35.0 HRC
44 HV
40 HB
80 HV
28.0 HRB
44 HV
46.0 HRE
to
130 HV
133.8 HK 0.5
130 HV
138.7 HK 1
1000 HV
903 HB
1000 HV
70.0 HRC
189 HV
160 HB
189 HV
91.0 HRB
135 HV
101.0 HRE
47
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