INTERNAL STRAINS IN TREATED TUBE,
366
Slice A-B 14.
* Rings.	Diameters.			Strains.		Stresses.	
	A.	B.	Mean.	Tension.	Compres- sion.	Tension.	Compres- sion.
1		Inches. 5.2060 7.9554	Inches. 5.2114 7.9440	Inches. 5.2087 7.9497	Inch.	Inch.	Pounds.	Pounds.
2								
							
SLICE ANNEALED (INTACT) IN OIL AT 1,100° F. (Holes defining extremities of diameters reamed after annealing.)
1		5.2059 7.9549	5.2105 7.9428	5.2082 7.94885				
2								
							
RINGS DETACHED.
	5.2062	5.2108			.0003 .00045		1.700 1.700
	7.9562	7.9424	7.9493				
							
Bore, A ".0116, ring detached. Bore, B ".0096, ring detached.
Section A-B, diameters 18 to 27, was turned down from 1".535, the original thickness of the tube, to ".165 thickness of walls.
Longitudinal and diametrical measurements taken before and after turning down gave the following results:
LONGITUDINAL STRAINS RELEASED AND THEIR CORRESPONDING STRESSES.
Gauged lines.	Measurements taken.		Strains released.	Stresses corresponding, compression per square inch.
	Walls of full thickness.	Walls 165.״ thick.		
A i		Inches. 6.7094 6.7040 6.6836 6.6964	Inches. 6.7146 6.7085 6.6880 6.7015	Inch. .0052 .0045 .0044 .0049	Pounds. 23,300 20,100 19,700 22,000
B 					
Ao					
Be					
				
				21,300