OUTER BASES---15-POUNDER GUN MOUNTS..
168
No. 7269.
Marks, 20B15 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 31.000 32.000 33.000 34.000 35.000 76,500	Inch. 0. . 00010 .00035 .00075 .00110 .00130 .00150 .00750 .00815 .00900	Inch. 0. .00010 .00025 .00040 .00035 . 00020 .00020 .00600 .00065 .00085	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
						
					
					
					
					
General summary.
.....................pounds.. 76,500
.........................do... 30,000
........................inch.. .1700
.........................do... .00110
.........................do...	.045
.............................. 16.9
..................... ".95 from neck
granular, silky spot at circumference
*18." ,16.״...........:..............
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. 7219.
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 25.000 29.000 30.000 31.000 32.000 33.000 34.000 35.000 73,450	Inch. 0. . 00015 .00030 .00060 , 00085 .00100 .00105 . 00460 . 00680 .00740 .00800 . 00900	Inch. 0. .00015 .00015 . 00030 .00025 .00015 .00005 .00355 .00220 .00060 . 00060 . 00100	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
					
					
......................pounds.. 73,450
.........................do... 30,000
........................inch.. .1500
..........................do... .00105
.........................do...	.045
............................... 16.9
...................... 92.״ from neck
granular, silky spot at circumference
14.״ ,*16.״ ..........................
General summary.
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............................