IKNEB BASES---15-POUNDER GUN MOUNTS.
158
No. 7335.
Marks, ibis 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	Inch. 0. .00010 . 00025 .00060	Inch. 0. .00010 .00015 .00035 .00020 .00025 .00005 . 00600 .00040 .00075 . 00095 . 00080	Inch. 0. 0.	Inch. 0. 0.	Initial load.
					
					
29.000 30.000	.00105				
					Elastic limit.
	. 00710 .00750 .00825				
32.000 33.000 34.000 35.000					
					
					
					
					Tensile strength.
		1 1			
General summary.
...............pounds..	72,950
.....................do...	30,000
.............inch..	.2050
'77'....................do...	.00110
............do...	.065
.7.’.’.7.7.’................. 23.9
.................... 1". 15 from neck
granular, silky spot at circumference
&	, I...............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.•............................
No. 7342.
Marks, ib°i6 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 33.000 34.000 35.000 36.000 37.000 38.000 80,100	Incli. 0. .00010 .00040 .00070 .00105 .00135 .00700 .00790 . 00860 .00925 .01025	Inch. 0. .00010 .00030 . 00030 .00035 . 00030 . 00565 . 00090 . 00070 . 00065 .00100	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
....................pounds..	80,100
........................do...	33,000
................inch..	.2050
77......................do...	.00135
...........do...	.065
77.7.7....................... 23.9
.....................1". 1 from neck
granular, silky spot at circumference .........................".20, ".21*
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...............................