WROUGHT IRON.
448
No. 7425.
Norway Iron.
Diameter, 1".129.
Sectional area, 1 square inch.
Gauged length, 10".
Remarks.
Elastic limit.
Micrometer reset at zero on 8" of the original gauged length.
In gauged length.
Set.
Elonga-
tion.
Inches.	Inch.
0.	0.
.0015	0.
.0032
.0079*
.0165 .1430 .1570 .20 .23 .29 .37
45
without load 7 days.
0.	0.
.0011	0.
.0026 .......
.0055	.....
.0084	.....
. 0100	0.
. 0105	.....
( .0108 ..........
\	•0993	......
Applied loads per square inch.
Pounds.
1,000
5.000 10,000 19,600 20,000
20.500 21,000 22,000
23.000
24.000
26.000 28,000
30.000 Rested
1.000
5,000
10.000 20,000
30.000
35.000
35.500
36.000
Tensile strength. =31.3 per cent.
. 57 .59 .64 .73 .85 1.03 1.50 2.08 3.13
36.000
37.000
38.000
40.000
42.000
44.000
46.000 46,500
0
Elongation of inch sections: ".19, ".26, ".28, ".81, ".85*, ".35, ".25, ".23, ".22, ".19.
Diameter at fracture, ".65; area, .332 square inch.
Contraction of area, 66.8 per cent.
Appearance of fracture, fibrous.