METAL FROM ROTATING SHAFTS,
638
No. 7368.
Marks, 5 C 2.
Endurance test, No. 305.
Diameter, ".564.
Sectional area, .25 square inch. ■Gauged length, 3".
Remarks.
Successive permanent set.
Permanent set.
Successive elongation per inch.
Elongation per inch.
Applied loads, per square inch.
Initial load.
Elastic limit (not well defined).
Inch.
0.
0.
. 000100 .000033 .000067
.000100 .000133 .000200
.000933
Tensile strength.
Inch.
0.
.000100 .000267 . 000400 . 000533 . 000367 .000333 . 000300 . 000133 . 000500 .003734 . 000333 .001000 . 002400 .002267 .002433 . 002233 . 003400 . 003100 .003500 .006 .007 .003 .010 .010
Inch.
0.
.000100 . 000367 . 000767 .001300 .001667 .002000 .002300 . 002433 .002933 .006667 .007000 . 008000 . 010400 . 012667 .015100 .017333 . 020733 . 023833 .027333 .033 .040 .043 .053 .063
Pounds. 1,000 5,000 10,000 20,000
30.000
40.000
50.000
58.000
59.000
60.000 61,000 62,000
64.000
68.000
72.000
76.000
80.000
84.000
88.000
92.000
96.000
100,000
104.000
108.000 112,000 117,400
General summary.
Tensile strength per square inch of original section..........................pounds.. 117,400
Elastic limit per square inch of original section (not well defined)...........do... 58,000
Elongation per inch after rupture.............................................inch..' . 1333
Elongation per inch under strain at elastic limit..............................do... . 002300
Reduction in diameter at point of rupture......................................do...	.064
Reduction in area after rupture, per cent of original section....................... 21.4
Position of rupture........................................................... 8./׳ from neck
Character of broken surface............................... fine granular, radiating from center
Elongation of inch sections................................................... ".19*, ".12, ".09