ON IMPACT TESTS, 33 
TasBLE VIII, 
Charpy Apparatus. 
Test-piece 10 x 10 x 60. Area at notch °75 sq. cm. 
Energy ofrupture | 
a aaa le Of ae Hard- | 
Mark ee _K.G.M. | rupture D nes Remarks 
sq. cm. 
K D° 
3198 Bl 85 1-13 0 fore) 173 
3198 B9 ‘86 | 114 0 ws 161 
3198 B17 80 1:06 0 ae co 163 
3198 B24 "83 1:10 0 co 174 
2300 Bl ‘18 1:04 0 fore) 184 
2300 B7 1-03 1:37 0 co 190 Coarse crystalline 
9300 Bl4 96 1:28 0 co 191 fracture, fine 
2300 B21 “90 1:19 0 0 199 crystals at ex- 
1324 Al 1:05 1-40 5 “280 197 |/ treme compres- 
1324 A7. “85 1:13 0 co 182 sion edge. +3 
1324 Al4 ‘15 1:00 0 fore) 190 i 
1324 A20| 2:92 | 3:88 8 485 | 180 { 1324 A20 
Finer crystals. 
3184 B2 1:25 1:66 0 co 178 
3184 B9 1:23 1:63 2 $15 175 
3184 B15 1:05 1:40 1 1-40 194 
3184 B26 96 1:28 3 427 165 
Gun Steel 1 8.38 10:94 18 “607 284. Minutely fine 
»  »3| 825 | 10-80 16 674 284 eryst. Silky at 
* »2| 817 10:82 17 637 277 edges. 
R31 1 8:12 | 10-83 23 473 120 || Fine eryst., 
R3l 2 7°84 10°45 22 ‘475 120 J minutely fine 
R31 3 7°84 | 10°45 22 ‘475 123 at edges. 
5960 1 8:12 10°83 21 “O17 220 Fine eryst., 
5960 2 8-02 10-69 20 535 218 minutely fine 
5960 3 7-84 | 10-45 20 523 222 at edges. 
Rll 7 10°57 14:10 38:6 365 151 Fine crystal, 
Rll 10 11:00 14-67 375 391 142 minutely fine 
- Ril ll 10-45 |. ao 37:7 352 145 at edges. 
R19 6 12-17 16-24 27:0 610 206 . 
Ri9 9 | 9:06 |-1208 | 27:5 | -441 | 214 fatnatey pnp 
R19 7-68 | 10-21 17-3 | -590 218 ah hy ‘ 
