121
PIVOT YOKES---15-POUNDER GUN MOUNTS.
No. 7272.
Marks, f p4y 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 35.000 36.000 37.000 38.000 39.000 40.000 75,500	Inch. 0. .00010 .00030 .00060 .00100 .00120 .00910 .01000 .01040 .01135 .01240	Inch. 0. .00010 .00020 .00030 .00040 . 00020 .00790 .00090 .00040 . 00095 . 00105	Inch. 0.	Inch. 0.	Initial load. Elastic limit. Tensile strength.
					
General summary.
......................pounds..	75,500
.........................do...	35,000
........................inch..	.1500
.........................do...	.00120
.........................do...	.045
............................. 16.9
.....................".35 from neck
granular, silky spot at circumference ..........................". 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. 7284.
IV ,r i S 95 IViarKS, p Y 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 71,100	Inch. 0. .00010 . 00035 . 00065 .00100 .00150 . 00500 .00600 .00680 .00750	Inch. 0. .00010 .00025 .00030 .00035 .00050 .00350 .00100 . 00080 .00070	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
General summary.
.....................pounds.. 71,100
.........................do... 29,000
...........־............inch.. .0650
.........................do... .00100
.........................do...	.015
.............................. 5.7
..................... ".65 from neck
granular, silky spot at circumference
*07." ,06.״ .........................
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.............................