639
METAL FROM ROTATILO SHAFTS,
No. 7381.
ma-riks, o ¿j.
Endurance test, No. 306. See Report 1899, p. 855. Diameter, ".564.
Sectional area, .25 square inch.
Gauged length, 3".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set.	Successive permanent set.	Remarks.
Pounds. 1,000 5,000	Inch. 0. .000100 .000333	Inch. 0. .000100 .000233 .000334 .000333 . 000367 .000265 . 014367 .001067 . 000600 .000933 .001400 .003000 .002333 .003000 .005 .007 .007 .013 .017 .043	Inch. 0. 0.	Inch. 0. 0.	Initial load.
20,000 30.000 40.000 49.000 50.000					
	.001000 .001367				
			0.	0.	Elastic limit.
	.016000 .017067 .017667 .018600				
					
52.000 53.000 54.000 56.000 58.000 60.000 62,000 64.000 68.000 72.000 76.000 80.000					
					
					
	.023000 .025333 . 028333				
					
					
					
					
	.047				
					
					
					
					Tensile strength.
					
.pounds.. 82,000
....do... 49,000
___inch.. .2733
....do... .001633
....do...	.184
......... 54.6
.. 16.״ from neck .......fine silky
20.״ *43.״ ,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.
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