159
INNER BASES---15-ROUNDER GUN MOUNTS,
No. 7343.
Marks, №i96 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	Inch. 0. .00010 . 00035	Inch. 0. .00010 . 00025	Inch. 0. 0.	Inch. 0. 0.	Initial load.
20,000	.00070	. 00035			
30,000	. 00100	.00030			
40,000	.00145	.00045			Elastic limit.
41,000	.00740	. 00595			
42,000	.00775	. 00035			
43,000	.00835	.00060			
44,000	.00900	.00065			
45,000	.00950	. 00050			
90, 600					
					
General summary.
.pounds.. 90,600
....do... 40,000
---inch.. .1900
....do... .00145
....do...	.055
.......... 20.5
. ". 95 from neck silky 80 per cent ..... ".22*, ".16
Tensile strength per square inch of original section....
.Mastic limit per square inch of original section ...	.........................
Elongation per inch after rupture....	..............................
Elongation per inch under strain at elastic limit..............................
Keduction in diameter at point of rupture	..............................
Reduction in area after rupture, per cent of original'section..................
Position of rupture.....
;•;E -;;V
No. 7344.
Marks,
Diameter ".505.
Sectional area, .20 square inch. Gauged length, 2".
Remarks.
Initial load.
Elastic limit.
Tensile strength.
Successive
permanent
set.
Inch.
0.
0.
Permanent set.
Inch.
0.
0.
Successive elongation per inch.
Inch.
0.
.00010 .00030 .00030 . 00030 . 00030 .00670 .00050 .00060 .00065 .00075
Applied loads per square inch.	Elongation per inch.
Pounds.	Inch.
1,000	0.
5,000	.00010
10,000	.00040
20,000	.00070
30,000	.00100
35,000	.00130
■ 36,000	. 00800
37.000	. 00850
38,000	00910׳.
39,000	.00975
40,000	. 01050
80,350	
General summary.
Tensile strength per square inch of original section
Elastic limit per square inch of original section ...................................pounds.. 80,350
Elongation per inch after rupture	........................................do... 35,000
Elongation per inch under strain at elastic’lim it...................................lrLch- ־ •A700
Reduction in diameter at point of rupture ...........................................5°00180־ ־ ־ ־
ro^tion°o£ruDtureaIter rupture’ per cent oi °ri^naise<^on7.7.7.7.7.7.7.7.7.7.7.".".'.".7."."״?!!I 20*5
Character of broken surface...... ............................: — ,-־־-־־־...........60•״  from neck
Elongation of inch sections .................................. granular, silky spot at circumference
14.״ ,*20'.״ ...........................................................