PIVOT YOKES--15-POUNDER GUN MOUNTS.
126
No. 7268.
Marks,
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 24.000 25.000 26.000 27.000 28.000 29,000 66,900	.Inch ׳ .0 00010. 00035. 00070. 00095. 00140. 00200. 00250. 00325 . 00410.	Inch. 0. .00010 . 00025 .00035 .00025 .00045 .00060 .00050 .00075 .00085	Inch, 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
General summary.
.........pounds.. 66,900
.............do... 24,000
............inch.. .1500
.............do... .00095
.............do...	.045
.................. 16.9
..........".4 from neck
granular, brilliant facets
*17.״ ,13.״ .............
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. 7255.
20 souare inch.
Marks, py8i5 Diameter, ".505.
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 21,000 22,000 23.000 24.000 25.000 62,400	Inch. 0. .00010 .00030 .00065 .00100 .00145 .00215 .00310 .00440	Inch. 0. .00010 .00020 .00035 .00035 .00045 .00070 . 00095 . 00130	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
.........pounds.. 62,400
.............do... 20,000
............inch.. .1859
.............do... .00065
.............do...	.055
.................. 20.5
...........".8 from neck
granular, brilliant facets
18 .״ ,*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............................