INNEB BASES----15־I0׳UNDEB GUN MOUNTS,
154
No. 7308.
Marks, ibis Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set.	Successive permanent set.	' Remarks.
Pounds. 1,000 5,000 10,000 20,000 30.000 32.000 33.000 34.000 35.000 36.000 37.000 71,400	Inch. 0. . 00015 . 00030 . 00065 .00110 .00120 . 00940 . 00960 .01025 .01100 .01210	Inch. 0. .00015 .00015 .00035 .00045 .00010 .00820 .00020 .00065 .00075 . 00110	Inch. 0. 0.	Tncli. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
					
General summary.
Tensile strength per square inch of original section.....................pounds.. 71,400
Elastic limit per square inch of original section.............................■oo. • - »A uuu
Elongation per inch after rupture	................................... u n	om on
Elongation per inch under strain at elastic limit.............................2°-־-
Reduction in diameter at point of rupture.....................................uo-־ ־ i™
Reduction in area after rupture, per cent of original section.................-g-g-	^ »
Character of broken surface.......................... granular 80 per cent, duii silky 20 per-cent
Elongation of inch sections..........................................................•10
No. 7309.
Marks, ib115 Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set.	Successive permanent set.	Remarks.
Pounds. 1,000 5,000 10,000 20,000 30.000 34.000 35.000 36.000 37.000 38.000 39.000 40.000 77.000	Inch. 0. .00015 .00035 .00070 . 00105 .00125 .00135 .00815 .00875 . 00960 . 01030 .01115	Inch. 0. . 00015 . 00020 .00035 .00035 .00020 .00010 . 00680 .00060 . 00085 . 00070 . 00085	Inch. 0. 0.	Inch. 0. 0.	Initial load. Elastic limit. Tensile strength.
					
					
					
					
					
					
					
					
					
					
					
General summary.
....pounds.. 77,000
........do...	35,000
......inch.. .1500
........do...	.00135
........do...	.045
............. 16.9
..... 90.״ from neck
dull silky 20 per cent ...........n.	16*, 14 .״
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............
Character of broken surface.........................granular 80 per cent,
Elongation of inch sections..............................................