OUTER BASES---15-POÜNDER GUN MOUNTS.
174
No. 7289.
Marks, oBis 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 38.000 39.000 40.000 41.000 42.000 43.000 83,900	Inch. 0. .00005 .00025 .00055 .00095 .00120 .00730 .00850 .00900 .01000 . 01075	Inch. 0. .00005 .00020 .00030 .00040 .00025 .00610 .00120 .00050 . 00100 .00075	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
					
General summary.
.........................pounds..	83,900
............................do...	38,000
...........................inch..	.1650
............................do...	.00120
..........................do...	.055
.................................. 20.5
........................ '75.׳ from neck
granular 70 per cent, silky 30 per cent . ........................... ".15, ".18*
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. 7290.
Marks, ob is 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 36.000 37.000 38.000 39.000 40.000 41.000 81,500	Inch. 0. .00010 . 00030 .00060 . 00100 . 00120 .00710 .00800 .00890 .00925 .01020	Inch. 0. .00010 .00020 . 00030 .00040 . 00020 .00590 .00090 .00090 . 00035 .00095	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
					
General summary.
......................pounds..	81,500
.........................do...	36,000
......................inch..	.1550
.....................do...	.00120
.........................do...	.045
.............................. 16.9
....................... 1" from neck
granular 70 per cent, silky 30 per cent ......................... ".17* ".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................................