PIVOT YOKES---15-POUNDER GUN MOUNTS.
130
No. 7286.
Marks, |y6i5 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 66,250	Inch. 0. . 00010 . 00030 . 00065 . 00100 . 00800 .00890 .00950 . 01025 .01150	Inch. 0. .00010 .00020 .00035 .00035 .00700 .00090 .00060 .00075 .00125	Inch. 0. 0.	Inch. 0. 0.	Initial load. • Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
General summary.
..pounds.. 66,250
....do... 29,000
___inch.. .1100
....do... .00100
.....do...	.035
.......... 13.2
.. 65.״ from neck at circumference
10.״ ,*12.״......
granular, silky spot
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. 7287.
Marks, Iy6ib 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 72,100	Inch. 0. .00010 .00030 .00060 .00105 .00665 .00735 . 00820 .00900 .01000	Inch. 0. .00010 .00020 .00030 . 00045 . 00560 . 00070 .00085 .00080 .00100	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
.................pounds.. 72,100
........................do... 30,000
............inch.. .1900
...........do... .00105
...........do...	.055
'7.7.7.....־......................20.5 
........................75.״  from neck
granular, silky spot at circumference
18.״ ,*20.״............................®
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..................-.........