STEEL БОК STANDARDIZING TESTING MACHINES.
404
No. 7375.
Marks, g s Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set..	Successive permanent set.	Remarks.
Pounds.	Inch.	Inch.	Inch.		
1,000	0.	0.	0.	0.	Initial load.
5,000	.00010	. 00010	0.	0.	
10,000	.00035	. 00025			
20,000	.00060	.00025			
30,000	.00100	. 00040			
40,000	.00135	.00035			
50,000	.00165	.00030			
60,000	.00200	. 00035			
70,000	.00250	.00050				Elastic limit, approximately.
71,000	.00280	.00030			
72,000	.00300	.00020			
73,000	.00335	.00035				
74.000 75.000	.00385	. 00050				
	.00420	. 00035			
76,000	. 00480	.00060			
78,000	.00590	. 00110			
80,000	.00805	.00215			
88,100					
					
General summary.
.......pounds.. 88,100
...........do...	70,000
..........inch..	.1700
...........do...	.00250
...........do...	.155
............... 51.9
■ - -.. ".95 from neck
.. fine silky, cup-shaped ............ ".08, ".26*
Tensile strength r er square inch of original section.......
Elastic limit per square inch of original section (approximately)
Elongation per inch after rupture................
Elongation per inch under strain at elastic limit.....
Reduction in diameter at point of rupture.............
Reduction in area after rupture, per cent of original section
Position of rupture...................................
Character of broken surface................ . ."............
Elongation of inch sections...........V////.