12-INCH STEEL В. L. RIFLED MORTARS.
62
Jacket.
No. 7357.
־TY rr \	12 M Rug J
Marks, b t! o Diameter, ".564.
Sectional area, .25 square inch. Gauged length, 3".
Remarks.
Ж1 Elongation “j £ '~‘p— S?nchre permCh* ì per inei!. set	set.
Initial load.
Elastic limit.
Tensile strength.
.000033
Inch.
0.
0.
.000033
Inch.
0.
.000100 .000233 .000334 .000366 .000167 .000167 .000066 . 000300 .000267 .000333 .001000 .003000 .001600
Inch.
0.
.000100 .000333 . 000667 . 001033 .001200 .001367 .001433 .001733 ■ .002000 .002333 .003333 .006333 .007933
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 87,200
, pounds.. 87,200
____do... 49,000
....inch..	.2167
....do... .001733
....do...	.164
......... 49.7
. .9." .־ from neck ......... silky
12.״ ,15.״ ,*38.״ ...
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 broken surface.............................
Character of rupture...................................
Elongation of inch sections............................