- B1 -
APPENDIX B
NATIONAL BUREAU OF STANDARDS TEST RESULTS
Table A1. Hardness Test Results,
Eye CO, Segment 1.
Distance
from south
face
Vickers hardness number
Spec.
A
Spec.
D
Spec.
F
Spec.
H
0.5 mm 0.02 in. 245 238 233 210
1.0 .04 251 245 243 240
1.5 .06 253 245 251 243
2.5 .10 262 253 254 249
3.5 .14 264 251 251 249
4.5 .18 260 253 253 256
8.5 .33 258 256 254 258
12.5 .49 258 254 247 254
15.5 .61 251 253 249 253
22.5 .89 242
Dista.. e
from north
face
Vickers hardness number
Spec.
C
Spec.
E
Spec.
G
Spec.
J
0.5 mm 0.02 in. 232 216 212 213
1.0 .04 242 227 230 227
1.5 .06 243 233 235 235
2.5 .10 245 238 243 243
3.5 .14 251 242 245 242
4.5 .18 254 254 242 253
8.5 .33 258 254 253 254
12.5 .49 253 256 249 254
15.5 .61 249 249 251 253
22.5 .89 236 254