397
NICKEL STEEL.
No. 7295.
Marks, 3" round nickel steel. Carbon Steel Company. Diameter, ".500.
Sectional area, .196 square inch.
Gauged length, 2".
Elastic limit.
Tensile strength.
Permanent set.	Successive permanent set.
' I Inch. ! Inch. 0. 0. 0. 0.	
	
0. 0.	
	
	
	
	
	
-	
	
	
	
	
Successive elongation per inch.
Inch.
0.
.00010 .00020 .00030 .00040 .00030 .00020 .00010 .01040 .00100 .00095 .00080 .00175 .00175
Applied |
loads per ;Elongation square ! per inch, inch. i
Inch.
0.
.00010 .00030 .00060 .00100 .00130 .00150 .00160 .01200 .01300 .01395 .01475 .01650 .01825
Pounds.
1,000
5,000
10,000
20,000
30.000
40.000
48.000
49.000
50.000
51.000
52.000
53.000
54.000 80,710
General summary.
Tensile strength per square inch of original section............................pounds..	80,710
Elastic limit per square inch of original section ..............................  .do...	49,000
Elongation per inch after rupture................................................inch..	. 2300
Elongation per inch under strain at elastic limit..................................do...	. 00160
Reduction in diameter at point of rupture.........................................do...	. 140
Reduction in area after rupture, per cent of original section............................ 48.1
Position of rupture...........................-............................... 70.״ from neck
Character of broken surface......................................................... fine silky
Elongation of inch sections......................................................... 33." ,13.״*