127
PIVOT YOKES---15-POUNDER GUN MOUNTS.
No. 7256
Marks, pyi5 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 26.000 27.000 28.000 29.000 30.000 64,750	Inch. 0. .00010 .00035 .00060 .00085 .00125 .00350 . 00525 .00625 .00700	Inch. 0. .00010 .00025 .00025 .00025 .00040 .00225 . 00175 . 00100 .00075	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
General summary.
.....................pounds.. 64,750
..............:..........do... 25,000
........................inch.. .0800
.........................do... .00085
.........................do...	.025
.............................. 9.5
..................... ".10 from neck
granular, silky spot at circumference
07.״ ,*09." .........................
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. 7276.
Marks, | Y°i5 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 64,500	Inch. 0. .00010 .00035 . 00070 . 00100 . 00125 .00300 .00710 .00775 .00890	Inch. 0. .00010 .00025 .00035 .00030 .00025 .00175 .00410 .00065 .00115	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
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General summary.
...................pounds.. 64,500
......................do... 29,000
......................inch.. .0850
.......................do... .00100
.......................do...	.085
............................ 13.2
................... ".65 from neck
Contains a sand spot ".10 diameter
*11.״ ,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-------------- dull silky, oblique.
Elongation of inch sections...................................