59
IB-INCH STEEL B. L. RIELED MORTARS.
Jacket.
No. 7298.
",XT 1	12 MR113 J
Marks, mt!o Diameter, ".569.
Sectional area, .254 square inch. Gauged length, 3".
Remarks.
Initial load.
Elastic limit.
Tensile strength.
Permanent set.	Successive permanent set.
Inch. 0. 0.	Inch. 0. 0.
	
	
. 000033	. 000033
.000067	. 000034
	
	
	
	
	
	
	
Successive elongation per inch.
Inch.
0.
.000100 .000200 .000367 .000366 .000234 .000266 . 000067 .000200 .000367 .000166 .000167 .000800 . 001200
Elongation per inch.
Inch.
0.
. 000100 .000300 . 000667 .001033 .001267 .001533 . 001600 .001800 .002167 .002333 .002500 .003300 .004500
Applied loads per square inch.
Pounds. 1,000 5,000 10,000 20,000
30.000
35.000
40.000
42.000
49.000
50.000
51.000
52.000
53.000
54.000 92,090
General summary.
,pounds.. 92,090
....do... 49,000
...inch..	.2200
....do... .001800
____do...	.149
.......... 45.5
.. ".95 from neck .......... silky
13.״,18.״,*35.״ ...
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............................