117
PIVOT YOKES--15-POUNDER GUN MOUNTS,
No. 7262.
Marks, fp°Yi5 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 72,600	Inch. 0. .00010 .00035 . 00070 .00100 . 00120 . 00145 . 00800 .00875 .00950	Inch. 0. .00010 .00025 .00035 .00030 .00020 .00025 .00655 .00075 .00075	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
						
					
					
General summary.
Tensile strength per square inch of original section............................pounds.. 72 600
Elastic limit per square inch of original section..................................do.	29’000
Elongation per inch after rupture...............................................inch.. .1750
Elongation per inch under strain at elastic limit..................................do... . 00100
Reduction in diameter at point of rupture..........................................do...	. 055
Reduction in area after rupture, per cent of original section................... *	20 5
Position of rupture............................................................. 105.״ from neck
Character of broken surface.............................granular, silky spot at circumference
Elongation of inch sections........................................................18.״ 17.״*
No. 7212.
Marks, py 12 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 27.000 28.000 29.000 30.000 31.000 32.000 69,200	Inch. 0. .00010 .00030 .00065 .00095 .00240 .00325 . 00500 .00700 .00825	Inch. 0. .00010 .00020 .00035 .00030 .00145 .00085 .00175 .00200 .00125	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
General summary.
.....................pounds.. 69,200
.........................do... 27,000
........................inch.. .1950
.........................do... .00095
.........................do...	.055
.............................. 20.5
....................... ".8 from neck
granular 60 per cent, silky 40 per cent
*22.״ ,17.״ .........................
Tensile strength per square inch of original section...
Elastic limit per square inch of original section.......
Elongation per inch alter 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 secti'ons...........................