Ill
PIVOT SOCKETS--15-POUNDER GUN MOUNTS.
No. 7337.
Marks, ps15 Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Remarks.
Permanent set.	Successive permanent set.
Inch. 0. 0.	Inch. 0. 0.
	
	
	
	
	
	
	
	
	
	
	
	
	
Successive elongation per inch.
Elongation per inch.
Applied loads per square inch.
Initial load.
Elastic limit.
Tensile strength.
Inch.
0.
.00010 .00020 .00015 .00015 .00005 .00015 .00015 .00045 .00125 .00085 .00100 .00090 .00085
Inch.
0.
.00010 .00030 .00045 .00060 .00065 .00080 .00095 .00140 . 00265 .00350 .00450 .00540 .00625
Pounds. 1,000 5,000 10,000
15.000
18.000
19.000
20.000 21,000 22,000
23.000
24.000
25.000
26.000 27,000 59,950
General summary.
Tensile strength per square inch of original section............................pounds.. 59,950
Elastic limit per square inch of original section.................................do... 19,000
Elongation per inch after rupture...............................................inch.. . 0900
Elongation per inch under strain at elastic limit.................................do... . 00065
Reduction in diameter at point of rupture.........................................do...	. 025
Reduction in area after rupture, per cent of original section............................. 9.5
Position of rupture............................................................. ".35 from neck
Character of broken surface............................................granular, silvery luster
Elongation of inch sections........................................................... 08.״ ,*10.״
No. 7338.
Marks, p s 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 23.000 24.000 25.000 26.000 27.000 28.000 29.000 30.000 56,500	Inch. 0. .00010 .00030 .00075 .00095 .00100 .00140 .00450 .00525 .00575 .00680 .00775	• Inch. 0. .00010 .00020 .00045 .00020 .00005 .00040 .00310 .00075 .00050 .00105 .00095	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
					
					
56,500 24,000 .0500 .00100 .025 9.5
General summary.
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 ........................
Position of rupture............................................................. ".60 from neck
Character of broken surface...........................granular 60 per cent, dull silky 40 per cent
Elongation of inch sections...........................................................04, .06*