12-INCH STEEL B. L. RIFLES,
46
Tube.
No. 7362.
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.	Inch.	Inch.	Inch.	Inch.	
1,000	0.	0.	0.	0.	Initial load.
5,000 10,000 20,000 30,000	. 000100 . 000333 .000667 .001000	. 000100 .000233 .000334 . 000333	0.	0. *	
35,000	. 001200	. 000200	0.	0.	
40.000 44.000 45.000 46.000 47.000 48.000 49.000 50.000 87,120	. 001367 .001500 .001567 .002700 .004000 . 005600 . 006167 .007333	. 000167 .000133 .000067 .001133 .001300 . 001600 .000567 .001166	0.	0.	Elastic limit. Tensile strength.
ii/f„„]	15938 B»
Maiks, bt3m Diameter, ''.564.
General summary.
Tensile strength per square inch of original section............................pounds.. 87,120
Elastic limit per square inch of original section................................do... 45,000
Elongation per inch after rupture...............................................inch..	. 2233
Elongation per inch under strain at elastic limit...............................do... . 001567
Reduction in diameter at point of rupture. ״....................................do...	. 134
Reduction in area after rupture, per cent of original section.......................... 41.9
Position of rupture............................................................. V'A from neck
Character of broken surface..........־.......................................... silky, oblique
Elongation of inch sections..................................................... 13 ,*28 ," ,26.״