431
WROUGHT IRON.
No. 7431.
Best Puddled Iron.
Diameter, 1".129.
Sectional area, 1 square inch.
Gauged length, 10".
Applied loads per square inch.	In gauged length.		
	Elonga- tion.	Set.	Remarks.
Pounds.	Inches.	Inch.	
1,000	0.	0.	
5,000	.0014	0.	
10,000	.0033		
20,000	.0071		
30,000	.0110	.0001	
32,000	.0118		Elastic limit.
32,500	.1860		
33,000	.1980		
34,000	.25		
36,000	.32		
38,000	.42		
40,000	.53	.51	
Rested without load 8 days.			
1,000	0.	0.	
5,000	.0012	0.	
10,000	.0028		
20,000	.0060		
30,000	.0095		Micrometer reset at zero on 8" of the original gauged
40,000	.0126	0.	length.
45,000	.0144	0.	
46,000	.0148		
46,500	.0450		
47,000	.1515		
47,000	.70		
48,000	.73		
50,000	.87		
52,000 53,600	1.03		Tensile strength.
0	1.56		=15.6 per cent.
Elongation of inch sections: ".11, ".12, ".12, ".14, ".20, ".39*, ".13,
".12j	".12,	".11.
Diameter at fracture, ".92; area, .665 square inch.
Contraction of area, 33.5 per cent.
Appearance, fibrous, seamy.