45
12-INCH STEEL B. L. KIFLES,
Tube.
No. 7283.
Marks, iITJf 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.
Inch.
Inch.
Inch.
Inch.
Pounds.
Initial load.
Elastic limit.
Tensile strength.
0.	0.	•	0.
. 000067	0.	0.
.000233	................
.000367	................
.000366	................
. 000134	................
. 000200	0.	0.
. 000333	................
.002633	................
.000634	....1...........
. 000966	................
.000784	................
.000933	................
0.
.000067 . 000300 . 000667 .001033 .001167 .001367 .001700 .004333 .004967 .005933 .006667 .007600
1,000 5,000 10,000 20,000
30.000
35.000
40.000
49.000
50.000
51.000
52.000
53.000
54.000 91,360
---pounds.. 91,360
.......do...	49,000
......inch.. .2100
.......do... .001700
.......do...	.134
............ 41.9
1". 6 inch from neck
.............. Silky
.....".13, ".34*, ".16
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............................