6-INCH R. F. GUNS.
24
Tube.
No. 7290.
Marks, 6mRtI1T Diameter, ."505.
Sectional area, .20 square inch. Gauged length, 2".
Remarks.
Permanent set.	Successive permanent set.
Inch. 0. 0.	Inch. 0. 0.
	
	
0.	0■
.00005	. 00005
	
	
	
	
	
	
	
Successive elongation per inch.
Elongation per inch.
Applied loads per square inch.
Initial load.
Elastic limit.
Tensile strength.
Inch.
0.
.00010 .00025 .00025 .00010 .00020 .00025 .00010 .00025 .00065 .00090 .00105 .00110 .00095
Inch.
0.
.00010 .00035 . 00060 .00100 . 00120 .00145 .00155 .00180 .00245 .00335 . 00440 .00550 . 00645
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
91.000
General summary.
..........pounds.. 91,000
..............do... 49,000
.............inch.. .2150
..............do... .00180
..............do...	.105
.................... 37.1
......... 106.״ from neck
silkv, trace of granulation
16.״ ,*27.״ ................
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.............................