WROUGHT IRON
446
No. 7423.
Norway 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 ■	.0013	0.	
10,000	.0031		
20,000 21,700 22,000	.0071	.0001	Elastic limit.
	.0650		
23,000	.2130		
24,000	.25 '		
26,000	.33		
28,000	.40		
30,000	.48		
32,000	.59 .		
34,000	.70		
35,000	.81	.80	
Rested	without load 1 day.		
1,000	0.	0.	
5,000	.0012	0.	
10,000	.0029		
20,000	. 0062		
30,000	.0094		
35,000	.0110	0.	Micrometer reset at zero on 8" of the original gauge:!
36,000	.0114		length.
38,000	. 0121		
39,000	.0125	0.	
40,000	.0129	.0002	
40,500	.0138		
41,000	.1550		
41,000	.99		
42,000	1.05		
43,000	1.15		
44,000	1.35		
44,900	2.15	.....	Tensile strength.
0	3.20		= 32 per cent.
Elongation of inch sections: ".20, ".26, ".30, ".46, ".78*, ".29, ".26, ".23, ".23, ".19.
Diameter at fracture, ".64; area, .322 square inch.
Contraction of area, 67.8 per cent.
Appearance of fracture, fibrous.