125
PIVOT YOKES---15-POUNDER GUN MOUNTS.
No. 7251.
Marks, p Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Remarks.
Initial load.
Elastic limit.
Tensile strength.
Permanent set.־	Successive permanent set.
Inch. 0. 0.	Inch. 0. 0.
		
	
	
	
	
	
	
	
	
Successive elongation per inch.
Inch.
0.
.00010 .00020 .00040 .00025 .00010 .00045 .00225 .00175 . 00095 .00080
Elongation per inch.
Inch.
0.
.00010 .00030 .00070 .00095 .00105 .00150 .00375 .00550 .00645 .00725
Applied loads per square inch.
Pounds. 1,000 5,000 10,000 20,000
25.000
26.000
27.000
28.000
29.000
30.000
31.000 68,700
General summary.
68,700 26,000 .1350 .00105 .045 16.9
Position of rupture......־....־..............................................1.05"  from neck
Character of broken surface..............................granular 85 per cent, silky 15 per cent
Elongation of inch sections....................................................... 14.״ ,*13.״
Tensile strength per square inch of original section..........................pounds..
Elastic limit per square inch of original section.................................do...
Elongation per inch after rupture...............................................inch..
Elongation per inch under strain at elastic limit.................................do...
Reduction in diameter at point of rupture.........................................do...
Reduction in area after rupture, per cent of original section
No. 7252.
Marks, ITis Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Remarks.
Initial load.
Elastic limit.
Tensile strength.
Successive elongation per inch.	Permanent set. .	Successive permanent set.
Inch. 0. .00010 .00015 .00040 .00025 . 00015 .00005 .00010 . 00530 . 00080 . 00080 .00065 .00085	Inch. 0. 0.	Inch. 0. 0.
		
		
		
		
		
		
		
		
		
		
		
		
Elongation per inch.
Inch.
0.
.00010 .00025 .00065 .00090 . 00105 .00110 . 00120 .00650 . 00730 .00810 .00875 . 00960
Applied loads per square inch.
Pounds. 1,000 5,000 10,000 20,000
25.000
28.000
29.000
30.000
31.000
32.000
33.000
34.000
35.000 68,450
General summary.
............................pounds..	68,450
...............................do...	30,000
..............................inch..	.0950
...............................do...	.00120
............................... at the neck
granular 85 per cent, silky 15 per cent; silky section has blowhole ".10 diameter ................................. ׳ ,09.״M0
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...
Position of rupture................................
Character of broken surface.....................
Elongation of inch sections