METAL FROM ROTATING SHAFTS.
642
No. 7367.
Marks,7 71
Endurance test No. 317. See Report 1900, p. 1133. 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.
	Inch.	Inch.	Inch.	Inch.	Initial load.
1,000	0.	0.	0.	0.	
5; 000 10,000 20,000 30,000	.000100 . 000300 .000667 . 001000	.000100 .000200 . 000367 . 000333	0.	0.	
40.000 50.000	.001333 .001700	. 000333 . 000367	0.	0.	
55,000	. 001900	. 000200	0.	0.	
60,000 65.000 66.000 67.000 68.000 70.000 72.000 76.000 80.000 84.000 88.000 91,040	. 002067 . 002267 . 017667 . 019667 .021000 .024000 . 027000 .034167 .043333 .060 .083	.000167 . 000200 .015400 .002000 . 001333 .003000 . 003000 . 007167 . 009166 .017 .023	0.	0. 	 :::::::::::: 	 		Elastic limit. Tensile strength.
General summary.
.....pounds.. 91,040
.........do... 65,000
........inch.. .2433
.........do... .002267
.........do...	.214
.............. 61.5
...... 13.״ from neck
fine silky, cup-shaped
30 ״ ,*30 .״ ,13.״.....
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............................