PIVOT YOKES--15-POUNDER GUN MOUNTS.
120
No. 7249.
Marks, p y 15 Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Remarks.
Initial load.
Elastic limit.
Tensile strength.
Permanent set.	Successive permanent set.
Inch. 0. 0.	Inch. 0. 0.
	
	
	
	
	
	
	
	
		
	
	
Successive elongation per inch.
Inch.
0.
.00010 .00020 . 00030 .00015 .00015 .00005 .00230 .00175 .00075 .00075 .00075
Elongation per inch.
Inch.
0.
.00010 .00030 .00060 .00075 .00090 .00095 .00325 .00500 . 00575 .00650 . 00725
Applied loads per square inch.
Pounds. 1,000 5,000 10,000 20,000
25.000
28.000
29.000
30.000
31.000
32.000
33.000
34.000 70,900
.....................pounds..	70,900
........................do...	29,000
.......................inch..	.0650
....................do...	.00095
......................do...	.020
............................. 9.5
..................... ".90 from neck
granular, silky spot at circumference .......................... ".06, ".07*
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............................
No. 7265.
Marks, f py 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 29.000 30.000 31.000 32.000 33.000 34.000 69,500	Inch. 0. .00010 .00035 .00070 .00100 .00130 .00850 .00915 .01000 .01075	Inch. 0. .00010 . 00025 .00035 .00030 . 00030 . 00720 .00065 .00085 .00075	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit.
					
					
					
					
					
					Tensile strength.
					
					
		 s				
General summary.
.........:.....pounds.. 69,500
.....................do... 29,000
..................inch.. .1600
....................do... .00100
....................do...	.055
.......................... 20.5
.................. 65.״ from neck
cent', dull amorphous 40 per cent
*18.״ ,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....................granular 60 per
Elongation of inch sections....................................