694 
PROCEEDINGS 
OF 
Table I. 
Determination of the elastic limit and coefficient of 
elasticity in tension of nickel steel ““ F”’ (mild). 
SECTION 
H. 
Length upon which elongations were measured = 150mm 
(6 in.) 
Diameter = 0°6085” Area — 0°2908 square inches. 
roe i 1 
Fr angs in 3.5mm. 
——__ 
hoadin | [522 
1000 Ibs. Top. 
| 
0-30 38-2 
2-5 4°70 
3 | 5°10 
asd 38308 
5 6°90 
6 7°82 
7 8°75 
8 | 9°66 
9 10°58 
10 11°51 
11 12°44 
1220 2\ 134i 
ig | 14-48 
14. +| 15:70 
Sis 
4 
15° 
19 
“50 
95 
“91 
*82 
“79 
| 
| 
i 
Mean 
Extension! 
7 1 
Bottom. |inz>53,55mm. 
5: 
9: 
10° 
aie 
13° 
15° 
rf 
ilsie 
21 
23° 
24° 
26° 
28° 
31 
12,500 
31 
20 
05 
91 
ae 
61 
43 
30 
*15 
02 
85 
78 
82 
42 
Differences per 
1000 lbs. 
+ Limit of 
Elasticity 
+ Limit of Elasticity = 12,500 lbs. or 90-2908 = 43,000 Ibs. per sq. in. 
(19:2 tons) 
Coefficient of Elasticity = 27,730,000 Ibs. per sq. in. 
= 12,375 tons per sq. in. 
1 Obtained by adding the figures in the preceding two c:lumns. 
