OUTER BASES---15-POUNDER GUN MOUNTS.
176
No. 7333.
Marks, ob i5 Diameter, ".505.
.Sectional area. .20 square inch.
Gauged length, 2".
Remarks.
Initial load.
Elastic limit.
Tensile strength.
Successive permanent set.
Permanent set.
Inch.
0.
0.
Successive elongation per inch.
Inch.
0.
.00015 .00020 .00035 .00020 .00010 .00005 .00125 .00345 .00075 .00075 . 00075
Applied loads per square inch.	Elongation per inch.
Pounds.	Inch.
1,000	0.
5,000	.00015
10,000	. 00035
20,000	.00070
25,000	.00090
28,000	.00100
29,000	. 00105
30,000	. 00230
31,000	.00575
32,000	.00650
33,000	.00725
34,000	.00800
74,900	
General summary.
........................pounds..	74,900
...........................do...	29,000
........................  inch..	.1500
...........................do...	.00105
...........................do...	.045
............................... 16.9
...................... ".18 from neck
granular 85 per cent, silky 15 per cent ............................ ".16* ".14
Tensile strength per square inch of original section....
Elastic limit per square inch of original section.......
Elongation per inch after rupture.......................
Elongation per inch under strain at elastic limit.......
Reduction in diameter at point of rupture...............
Reduction in area after rupture, per cent of original section
Position of rupture.....................................
Character of broken surface.............................
Elongation of inch sections.............................
No. 7334.
Marks, ob 15 Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set.	Successive permanent set.	Remarks.
Pounds. 1,000 5,000 10,000 20,000 30.000 34.000 35.000 36.000 37.000 38.000 39.000 40.000 72,500	Inch. 0. .00015	Inch. 0. .00015 .00015	Inch. 0. 0.	Inch. 0. 0.	Initial load.
	00060	. 00030			
	00100	.00040			
		.00025			
		. 00005			Elastic limit.
	. 01080	.00950			
	. 01125	. 00045			
	. 01200	. 00075			
	.01310	.00110			
	.01400	. 00090			
					Tensile strength.
					
General summary.
......................pounds..	72,500
.........................do...	35,000
.........................inch..	.2050
.........................do...	.00130
.........................do...	.065
............................... 23.9
.................... 1".12 from heck
granular 40 per cent, silky 60 per cent ........................... ".20*, ".21
Tensile strength per square inch of original section....
Elastic limit per square inch of original section.......
Elongation per inch after rupture.......................
Elongation per inch under strain at elastic limit.......
Reduction in diameter at point of rupture...............
Reduction in area after rupture, per cent of original section
Position of rupture.....................................
Character of broken surface.............................
Elongation of inch sections.............................