WROUGHT IRON,
420
No. 7414.
Common Refined Iron.
Diameter, 1".129.
Sectional area, 1 square inch.
Gauged length, 10".
Applied loads per square inch.	In gauge length.		Remarks.
	Elonga- tion.	Set.	
Pounds.	Indies.	Indies.	
1,000	0.	0.	
5,000	.0012	0.	
10,000	.0030		
20,000	.0068	0.	
SO,000	.0102	0.	
34,000	. 0122		Elastic limit.
34,100	. 1250			
34,500	.1900		
35,000	.2030	.1890	
Rested without load 1 day.			
1,000	0.	0.	
5,000	. 0015		
10,000	.0034		
20,000	.0074		
30,000	.0111		
35.000 36.000	.0131 .0134	0.	Micrometer reset at zero on the original gauged length.
37,000	.0138		
38,000	.0143	0.	
38,500	.0161		
39,000	.0193		
40,000	.1350	. 1Í74	
41,000	.37		
42,000	.42		
43.000	.48		
44,000	.54		.
45,000	.60		
46,000	.67		
47,000	.75		
48,000	.87		
49,000	.99		
50,000	1.28		
50,800	1.85		Tensile strength.
0	2.24		= 22.4 per cent.
Elongation of inch sections: ".43*, ".31, ".24, ".24, ".22, ".19, ".17, ".15, ".16, ".13.
Diameter at fracture, ".90; area, .636 square inch.
Contraction of area, 36.4 per cent.
Appearance of fracture, fibrous, seamy.