129
PIVOT YOKES---15-POUNDER GUN MOUNTS.
No. 7279.
Marks, Vyi,
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 40.000 41.000 42.000 43, COO 44.000 45.000 81,200	Inch. 0. .00010 .00030 .C0060 .00100 .00140 .00875 .00950 . 01000 . 01050 .01160	Inch. 0. .00010 • . 00020 . 00030 .00040 . 00040 .00735 .00075 . 00050 .00050 .00110	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
						
					
					
...................'...pounds..	81,200
..........................do...	40,000
.........................inch..	.1000
..........................do...	.00140
..........................do...	.035
............................... 13.2
....................... ".65 from neck
silky 70 per cent, granular 30 per cent ............................ ".12*, ".08
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............................
7285.
No.
Marks, |ym 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 70,100	Inch. 0. .00010 .00040 .00065 . 00100 .00110 . 00760 . 00875 . 00965 .01050 .01225	Inch. 0. .00010 .00030 .00025 .00035 .00010 . 00650 . 00115 . 00090 . 00085 . 00175	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
					
General summary.
Tensile strength per square inch of original section..........................pounds 70 100
Elastic limit per square inch of original section..................................do * * 31 ’ 000
Elongation per inch after rupture..................................................inch"" il00
Elongation per inch under strain at elastic limit..................................do.".I . 00110
Reduction in diameter at point of rupture.....................................!!!"."Idol!" * 045
Reduction in area after rupture, per cent of original section...... ...................... !59
Position of rupture .... ..................................................״׳׳.׳."״!re from neek
Character of broken surface........................... dull silky 70 per cent, granular 30 per cent
Elongation of r^ch sections............................................................ ».12* 10.״
H. Doc. 508----9