403
STEEL FOR STANDARDIZING TESTING MACHINES
No. 7374.
Marks, Is Diameter, ".505.
Sectional area, .20 square inch. Gauged length, 2".
Applied loads per square inch.	Elongation per inch.	Successive elongation per inch.	Permanent! Successive Permanent, permanent sei• set.	Remarks.
Pounds. 1,000 5,000 10,000 20,000 30.000 40.000 50.000 60.000 70.000 71.000 72.000 73.000 74.000 75.000 76.000 77.000 78.000 80.000 88,000	Inch. 0. .00010 .00035	Inch. 0.	Inch. Inch. 0. 0.	Initial load.
				
		.00025		
		.00040		
	. 00130 .00165	.00030		
		.00035		
		.00035		
		.00045		
		.00010		Elastic limit not well defined.
	.00285 .00315 .00370	.00030		
		.00030		
		.00055		
	.00425	.00055		
		.00055	■	
	.00530	.00050		
		.00065		
	.01375	.00780		
				Tensile strength.
	! ! 1			
......pounds.. 88,000
....not well defined
........inch.. .1750
..........do... .155
............... 51.9
....... 1" from neck
fine silky, cup-shaped ........ ":25*, ".10
General summary.
Tensile strength per square inch of original section...
Elastic limit per square inch of original section......
Elongation per inch after rupture......................
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............................