421
WROUGHT IRON,
No. 7412.
Common Refined Iron.
Diameter, 1".129.
Sectional area, 1 square inch.
Gauged length, 10".
Remarks.
In gauged length.
Set.
Elonga-
tion.
Applied loads per square inch.
Inch.
0.
0.
Elastic limit.
0.
0.
.0002
Micrometer reset at zero on the original gauged length.
.30+
.0
Inches.
0.
.0012 .0031 .0070 .0105 .0127 .0131 .0137 .1690 .1900 .25 .32
Pounds. 1,000 5,000 10,000 20,000
30.000
35.000
00־35,5 36,000
37.000
38.000
40.000
Rested without load 1 day. 1,000 5,000
10.000 20,000
30.000
28.000
40.000
40.500
41.000
41.500
42.000
42.500
43.000
43.500
.0
.0015
.0036
.0078
.0117
.0149
.0157
.0159
.0161
.0163
.0165
.0168
.0170
.0174
.0182
.0196
.0218
.0285
44.000 44,500
45.000
Tensile strength. =22.7 per cent.
.51
.54
.90 1.05 1.30 1.85 2.27
46.000
47.000
48.000
49.000
50.000
51.000
52.000
53.000 53,930
0
Elongation of inch sections: ".18, ".24, ".48*, ".25, ".20, ".19 ".19 ".18, ".18, ".18.
Diameter at fracture, ".90; area, .636 square inch.
Contraction of area, 36.4 per cent.
Appearance of fracture, dull, fibrous, trace of granulation.