i 
} 
ON IMPACT TESTS, 
TABLE V, 
Summary 3. 
Hardness by the Amsler Cone 
dl 
ear ee 
Guillery| Charpy | Drop Hammer | 
Mark ; sseE Remarks 
10x10 | 10x10 | 20x20 | 30x30 
3198 i72 | 168 | 178 | 200 Carbon Steel 
.2300 1945 | 191 201 201 Ne 
1324 198 187 196 209°5 oe 
3184 173 178 187 195 Be i 
Gun Steel 289 282 246 231 
R31 125 121 154 153 Carbon Steel 
5960 221 220 218 239 Vanadium Chrome 
Rll 148 146 225 200 Nickel Chrome 
R19 226 213 245 206 Nickel Steel 
TaBLe VI. 
Summary 4. 
Impact Tension. Martens’ Drop Hammer. 
Number of Blows required for Rupture. 
18 kg. 18 kg. 36 ke. 
Mark 2 mts. 3 mts. 2 mts. Remarks 
Gun Steel 13:5 8-5 — ? 
R31 1l 9-5 5 Carbon Steel 
5960 11 5 3 Vanadium Chrome 
Rll 16 9 3 Nickel Chrome 
R19 11 uf 3 Nickel Steel 
