PIVOT YOKES---15-POUNDER GUN MOUNTS.
128
No. 7277.
t\t ] Sill
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.
	
	
	
	
	
	
	
	
		
	
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.
Pounds. 1,000 5,000 10,000 20,000 30.000 33.000 34.000 35.000 36.000 37.000 38.000 76,600	Inch. C. .00010 . 00030 . 00055 . 00095 . 00115 .00590 .00685 . 00765 . 00840 . 0092o	Inch. 0. .00010 .00020 .00025 .00040 .00020 .00475 .00095 .00080 .00075 .00085
		
..................pounds.. 76,600
........................do... 33,000
....................inch.. .2000
.........................do... .00115
.................do...	.055
.......................... 20.5
...................... 8.״ from neck
granular, silkv spot at circumference
*21.״ ,19.״ ....................... .
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. 7278.
Marks, | y2!5 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 36.000 76,600	Inch. 0. .00010 . 00030 .00060 .00100 .00110 . 00525 .00650 .00750 .00805 .00875	Inch. 0. .00010 .00020 . 00030 .00040 .00010 .00415 .00125 .00100 . 00055 .00070	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
		!			
...............pounds..	76,600
........................do...	31,000
...........inch..	.1600
...........do...	.00110
........................do...	.045
........................... 16.9
.......................7.״ from neck
granular, silky spot at circumference f..........................17.״ ,15.״*
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 alter rupture, per cent of original section
Position of rupture..............’.....................
Character of broken surface............................
Elongation of inch sections............................