PIVOT SOCKETS--15-POUNDEK GUN MOUNTS.
106
No. 7230.
Marks, ps is 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 29.000 30.000 31.000 32.000 33.000 34.000 69,900	Inch. 0. .00005 . 00020 . 00050 . 00070 . 00095 / .00100 1 .00600 . 00700 . 00800 .00890 .00990	Inch. 0. .00005 .00015 .00030 .00020 .00025 .00005 .00500 .00100 .00100 . 00090 . 00100	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
					
					
.....................pounds.. 69,900'
........................do... 29,000
.......................inch... .1650
........................do... .00095
.........................do...	.045
.............................. 16.9
..................... ".60 from neck
granular, silky spot at circumference
*18.״ ,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 after rupture, per cent of original section.
Position of rupture....................................
Character of broken surface............................
Elongation of inch sections............................
No. 7231.
Marks, psi5 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 21,000 22,000 23.000 24.000 25.000 26.000 27,000 62,650	Inch. 0. .00010 . 00025 . 00060 .00070 .00085 . 00160 .00225 .00340 .00450 .00550	Inch. 0. .00010 00015.׳ 00035. 00010. 00015. 00075. 00065. 00115. 00110. 00100.	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit.
					
					
					
					
					
					
					
						Tensile strength.
						
					
General summary.
.pounds.. 62,650
____do... 22,000
...inch.. .1000
....do... .00085
....do...	.035
......... 13.2
. ". 80 from neck
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.....................................
granular, silvery luster, silky spot at circumference
Character of broken surface.
08.״,*12.״
Elongation of inch sections