| 
30 REPORTS ON THE STATE OF SCIENCE.—1918. 
TasLe III, 
Summary 1. 
Energy of Rupture. 
K.G.M. per sq. cm. at notch. 
‘ Guillery Charpy | Martens’ Drop Hammer 
Mark = Remarks 
10x10 ; 10x10 20 x 20 30x 30 
gig | «(149 «| 68 | 87 Carbon Steel 
2300 | 249 | 1-22 ‘87 1-09 at heed 
1324 202 | 185 | 1-04 96 joe 
| *1324 168 | 1-18 “86 85 CO alae 
3184 217 | 1-49 1-08 1-19 | = 53 
Gun Steel | 9:80 | 10-85 15-09 11:33 
R31 10-71 10-58 11:43 2-45 Carbon Steel 
5960 13:11 | 10-66 4:24 3°51 Vanadium Chrome 
Rll 8:54 | 14-24 20-16 17-68 Nickel Chrome 
R19 5:91 | 12-84 | 20-11 16-10 Nickel Steel 
= 
* These figures are a mean of 1324 Al A7 Al4, 7.e., neglecting A20 which 
gave exceptionally high results throughout. 
Ratio, 
Guillery | Charpy 
TABLE IV. 
Summary 2. 
Drop Hammer 
Mark | 
10x10 10x10 {20x20 30x30 
3198 01 506.2.) > oon ames 
23006 (og) falc opanMnl MM (evoy MMILI iy fore) 
1324 bo =~) GD | ea | 00 
3184 0 FBP ico || eo co 
Gun Steel 592 | +639 | ‘851 | °734 
R31 466 474 564 990 
5960 509 525 756 | °781 
Rll 217 | +369 | -865 ‘907 
R19 326 | 547 696  -841 
Energy of rupture per sq. cm._K 
Angle of rupture 
D’ 
Remarks 
Carbon Steel 
Carbon Steel 
Vanadium Chrome 
Nickel Chrome 
Nickel Steel 
ee 
__ ey hee ee 
