61
12-INCH STEEL B. L. KIFLED MOBTARS.
Jacket.
No. 7356.
1% it i 32 M Rii7 J
Marks, bt!o Diameter, ".564.
Sectional area, .25 square inch. Gauged length, 3".
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 35.000 40.000 42.000 50.000 51.000 52.000	Inch. 0. .000100 .000300	Inch. 0. .000100 .000200	Inch. 0. 0.	Inch. 0. 0.	Initial load.
	.000633	.000333			
	.001000	.000367			
	.001167 .001333	.000167 .000166	0.	0.	
	. 001400	.000067			
	.001700	.000300			
	.001767	.000067			Elastic limit.
	.001933	.000166			
53.000 54.000 55.000 56.000 89,880	.002433	.000500			
	.005433	.003000			
	.006667	.001234			
	. 008000	.001333			
					Tensile strength.
					
General summary.
...................pounds.. 89,880
.......................do... 51,000
......................inch.. .1967
.......................do... .001767
.......................do...	.114
............................. 36.4
.................... 1".3 from neck
silkv, with granular spot on one side
17." *28." ,14.״ ...............;....
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.............................