10-INCH STEEL B. L. RIFLES.
40
Jacket.
No. 7372
Marks,
Diameter, ".564.
Sectional area, .25 square inch. Gauged length, 3".
Remarks.
Initial load.
Elastic limit.
Tensile strength.
Successive elongation per inch.	Permanent set.	Successive permanent set.
Inch. 0. .000100 . 000200 .000333 .000344 .000166 . 000200 . 000067 .000233 .000067 .005167 .000533 .000733 . 001067 .000867	Inch. 0.	Inch. 0.
		
		
	0.	0.
	0.	0.
		
		
		
		
		
		
		
		
		
Applied I loads per Elongation square per inch, inch.
Inch.
0.
.000100 .000300 .000633 .000967 .001133 .001333 .001400 .001633 .001700 .006867 .007400 .008133 .009200 .010067
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
55.000 90,360
General summary.
Tensile strength per square inch of original section.........................pounds. 90 360
Elastic limit per square inch of original section............... do '' 50000 ׳
Elongation per inch after rupture................ ...........................inch 1933
Elongation per inch under strain at elastic limit.......״״״”״”״״״״............do ” 001700
Reduction in diameter at point of rupture....................... ............do*** *	104
Reduction in area after rupture, per cent of original section. ..................... 33 5
Position of rupture.....................................................' ‘	' '[35'׳'׳ f־r^m ne(;k
Character of broken surface...................... fine granular, 50 per cent; silky, 50 per cent
Elongation of inch sections................................................... 3^7, *39 ׳/ 5}.״