405
STEEL FOR STANDAEDIZING TESTING MACHINES
No. 7376.
Marks, g6g Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent set.	Sucessive permanent set.	Remarks.
Pounds. 1,000 5,000 10,000	Inch. 0. .00010 .00035	Inch. 0. .00010 . 00025	Inch. 0. 0.	Inch. 0. 0.	Initial load.
20,000	.00060	.00025			
30,000	.00095	.00035			
40,000	.00135	.00040			
50,000	.00165	. 00030			
60,000	.00205	.00040			
69,000	. 00245	. 00040			
70,000	.00255	.00010			Elastic limit, approximately.
71,000	.00280	.00025			
72,000	. 00300	.00020			
• 73,000	.00330	.00030			
74,000	.00370	.00040			
76,000	.00455	.00085			
80,000	. 00850	. 00395			
84,000	. 02400	.01595			
88,300					
					
..........pounds..	88,300
■............do...	70,000
...........inch.. .1750
.............do...	.00255
.............do...	.155
...........,...... 51.9
at the middle of the stem ... fine silky, cup shaped
............... *.17, ".1$
General summary.
Tensile strength per 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..................... . . . . . . . . . .i.
Elongation of inch sections...........................