CARRIER RINGS, 6-POUNDER GUNS.	99
No. 7317.
Marks,
Diameter, ".505.
Sectional area, .20 square inch.
Gauged length, 2".
Initial load.
Elastic limit.
Tensile strength.
Permanent set.	Successive permanent set.
Inch. 0. 0.	Inch. 0. 0.
	
	
	
	
	
	
	
	
	
	
	
	
	
	
Successive elongation per inch.
Inch.
0.
.00015 .00005 .00040 .00035 . 00035 .00020 . 00005 .00010 .00070 .00035 . 00050 .00060 .00045 . 00050
Elongation per inch.
Inch.
0.
.00015 .00020 . 00060 .00095 .00130 .00150 .00155 .00165 .00235 .00270 . 00320 . 00380 .00425 .00475
Applied loads per square inch.
Pounds. 1,000 5,000 10,000 20,000
30.000
40.000
45.000
47.000
48.000
49.000
50.000
51.000
52.000
53.000
54.000 106,000
General summary.
Tensile strength per square inch of original section............................pounds.. 106,000
Elastic limit per square inch of original section..................................do... 48,000
Elongation per inch after rupture...............................................inch..	. 1500
Elongation per inch under strain at elastic limit...............................do... . 00165
Reduction in diameter at point of rupture..........................................do...	. 065
Reduction in area after rupture, per cent of original section........................... 23.9
Position of rupture............................................................. 54.״ from neck
Character of broken surface..................... fine granular, 80 per cent; dull silky, 20 per cent
Elongation of inch sections........................................................ ״ *,19.״.ll