PIVOT YOKES---15-POUNDER GUN MOUNTS.
122
No. 7227.
Marks, p y 15 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 23.000 25.000 26.000 27.000 28.000 29.000 30.000 62,850	Inch. 0. .00010 . 00030 . 00070 . 00085 .00100 . 00170 .00250 . 00350 . 00465 .00565	Inch. 0. .00010 .00020 .00040 .00015 .00015 .00070 .00080 . 00100 .00115 . 00100	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
General summary.
Tensile strength per square inch of original section.............................pounds.. 62,8o0
Elastic limit per square inch of original section................................_.ao... 25,uuu
Elongation per inch after rupture................................................men.. . muu
Elongation per inch under strain at elastic limit................................ao... . uuiuu
Reduction in diameter at point of rupture........................................ao•*״4״: ־
Reduction in area after rupture, per cent of original section....................1 ־־־־־•־V
Position of rupture.............................................................. V ■ from neck
Character of broken surface................. granular, silvery luster, silky spot at circumference
Elongation of inch sections............................................................14׳ •i4
No. 7266.
Marks, I p y 15 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 77.000	Inch. 0. .00015 .00040 .00080 .00105 .00135 .00160 .00180 .00225 .00775	Inch. 0. .00015 .00025 .00040 .00025 . 00030 .00025 . 00020 .00045 .00550	Inch. 0. 0.	Inch. 0. /0. :	 • 		Initial load. Elastic limit. Tensile strength.
			1		
.................pounds.. 77,000
...................do... 29,000
.................inch.. .1850
...............do... .00105
.................do...	.055
.......................... 20.5
....................... 1״ from neck
granular, silky spot at circumference
17.״ ,*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 c f broken surface...........................
Elongation of inch sections............................