WROUGHT IRON.
430
No. 7430.
Best Puddled Iron.
Diameter, 1".129.
Sectional area, 1 square inch.
Gauged length, 10".
Applied loads per square inch.	In gauged length.		Remarks.
	Elonga- tion.	Set.	
Pounds.	Inches.	Inch.	
1,000	0.	0.	
5,000	.0012	0.	
10,000	. 0031		
20,000	.0069		
30.000 32,700 33.000	.0109	.0001	Elastic limit.
	. Ì570		
34,000	.1890		
35,000	.25	.24	
Rested	without load 8 days.		
1,000	0.	0.	
5,000	. 0012	0.	
10,000	.0028		
20,000 30,000	.0058 .0089		Micrometer reset at zero on 8" of the original gauged
35', 000	.0102	Ó.	length.
38,000	. 0112	0.	
40,000	.0119	0.	
40,500	. 0121		
41,000	.1090		
41,000	.37		#
42,000	.40		
44,000	.49		
46,000	.57		
48,000	.70		
50,000	.88		
52,000	1.18		Tensile strength. •
53i 200	1.90		
0	2.25		=22.5 per cent.
Elongation of inch sections: ".16, ".17, ".19, ".22, ".44*, ".34, "19, ".19 ".19 ".16.
’ Diameter at fracture, ".87; area, .594 square inch.
Contraction of area, 40.6 per cent.
Appearance of fracture, fibrous.