423
WROUGHT IRON,
No. 7427.
Common Refined Iron.
Diameter, 1".129.
Sectional area, 1 square inch.
Gauged length, 10".
Applied loads per square inch.	In gauged length.		
	Elonga- tion.	Sét.	Remarks.
Pounds. 1,000 5,000 10,000	Inches. 0. .0012 .0030	Inch. 0. 0.	
20,000 30.000 31.000 31,600 32.000 33.000	.0067 .0102 .0107	0. 0.	
			Elastic limit.
	.0550		
	.1150		
34,000	.2040		
35.000 Rested 1,000 5,000 10.000 20,000 30.000 35.000 38.000 39.000 40.000	.2406 without loac 0. .0006 .0029	. 2254 7 days. 0. 0.	
	.0059		
	.0090		
	.0106 .0114	0.	Micrometer reset at zero on 8" of the original gauged length.
	.0120 .0125 / . 0131	0. .0004	
40,500	i .0217		
41,000	.1100		
41.000 42.000 44.000 46.000 48.000 50.000	.38		
	.39		
	.51		
	.61		
	.76		
	1.02		
51; eoo 0			Tensile strength. =15.8 per cent.
	1.58		
			
Elongation of inch sections: ".12, ".12, ".12, ".14, ".13, ".15, ".13, .17, ".24*, ".26.
Diameter at fracture, ".97; area, .739 square inch.
Contraction of area, 26.1 per cent.
Appearance of fracture, fibrous, seamy.