5-INCH B. L. SIEGE RIFLES,
18
Tube.
No. 7328.
Marks, 0״¿f Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set.	Successi permanent set.	Remarks.
Pounds. 1,000 5,000 10,000 20,000 80,000 35.000 40.000 42.000 45.000 46.000 47.000 48.000 49.000 ’ 50,000 51.000 52.000	Inch. 0. .00015	Inch. 0. .00015 .00025 .00035 .00035 .00025 .00015 .00010 . 00010 . 00020 .00015 .00020 .00150 .00125 . 00145 .00105	, Inch. 0. 0.	Inch. 0. 0.	Initial load„
					
					
	.00135		.00005	. 00005	
	. 00160		.00010	.00005	Elastic limit.
	*00190				
					
					
	«				
					
					
					Tensile strength.
					
	i					—_	
,pounds.. 84,450
....do... 45,000
...inch.. .2200־
....do... .00170
....do...	.185
......... 46.2
1" .1 from neck
...........silky
ft. 27*,	17
General summary.
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.