- B3 -
APPENDIX B
NATIONAL BUREAU OF STANDARDS TEST RESULTS
Table A2. Hardness Tests Results,
Eye C9, Segment 1.
Distance
from south
face*
Vickers hardness number
Spec.
A
Spec.
D
Spec.
F
Spec.
H
0.5 mm
0.02 in.
260
243
256
230
1.0
.04
256
247
262
243
1.5
.06
256
249
268
242
2.5
.14
254
262
260
264
4.5
.18
264
245
262
259
8.5
.33
247
251
251
12.5
.49
242
242
247
15.5
.61
233
240
22.5
.89
232
235
* See text
Distance
from north
face
Vickers hardness number
Spec.
C
Spec.
E
Spec.
G
Spec.
J
0.5 mm
0.02 in.
247
235
236
216
1.0
.04
245
242
247
240
1.5
.06
254
253
251
245
2.5
.10
260
264
254
247
3.5
.14
270
266
258
254
4.5
.18
266
266
266
260
8.5
.33
260
260
258
254
12.5
.49
247
251
249
254
15.5
.61
242
243
247
256
22.5
.89
236
242