419
WROUGHT IRON.
No. 7411.
Common Refined Iron.
Diameter, 1129.״.
Sectional area, 1 square inch.
Gauged length, 10 inches.
Remarks.
Applied loads per square inch.	In gauged length.	
	Elonga- tion.	Set.
Pounds.	Inches.	Inches.
1,000	0.	0.
5,000	.0012	0.
10,000	.0030	
20,000	.0069	0.
27.000 27,800 28.000	.0097	
	.0110	
28,500	.0290	
29,000	.0590	
30,000	.0850	.0731
Elastic limit.
■Micrometer reset at zero on the original gauged length.
Rested without load 1 day. 1,000 0. 0. 5,000 10,000 20,000 28,000
30.000 30,500
31.000
Tensile strength. = 9.6 per cent.
.0015
.0034
.0073
.0103
.0114
.0305
.0814
.18
.20
.22
.34
.43
.54
.69
32.000
33.000
34.000
36.000
38.000
40.000 42;000 43,020
0
Elongation of inch section: ".08, ".09, ".31*, ".08, ".08, ".05, ".07, ".06, ".07, ".07.
Diameter at fracture, 1".00; area, .785 square inch.
Contraction of area, 21.5 per cent.
Appearance, dull, fibrous, seamy, spongy. Defective specimen.