47
12-INCH STEEL B. L. RIFLES,
Tube.
No. 7363.
Marks, MTr;8o Diameter, ".564.
Sectional area, .25 square inch. Gauged length, 3"
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent se .	Successive permanent set.	Remarks.
	Inch.	Inch.	Inch.	Inch.	
1,000	0.	0.	0.	0.	Initial load.
5,000 10,000 20,000 30,000	. 000100 .000300 .000633 . 000967	.000100 . 000200 .000333 .000334	0.	0.	
35,000	.001100	.000133	0.	0.	
40.000 44.000 45.000 46.000 47.000 48.000 49.000 81,200	.001300 .001433 .010667 .011067 .011667 .012933 .013733	. 000200 . 000133 . 009234 . 000400 .000600 . 001266 .000800	0.	0.	Elastic limit. Tensile strength.
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General summary.
.pounds.. 81,200
....do... 44,000
___inch.. .2467
....do... .001433
....do...	.154
......... 47.2
___1'׳ from neck
...........silky
.. ". 37*,". 21,16
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.............................-
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