INTERNAL STRAINS IN GUN FORGINGS.
346
Tube 20691 B3.
Breech Slice.
State of internal strains and stresses at different phases of the slice.
SLICE INTACT.
Interior diameter of slice, 4".72; exterior diameter of slice, 10".50.
Rings.	Present mean diameters.	Strains.		Stresses per square inch.	
		Tension.	Compres- sion.	Tension.	Compres- sion.
	Inches. 4.8717 5.6539 9.64745 10.3323	Inch.	Inch. .0073 .00355	Pounds.	Pounds. 45,000 18,800
					
		.0056		17,400	
			.00045		1,300
					
Bings 1 and 4 detached; rings 2 and 3 in the slice.
Interior diameter of slice, 5".50; exterior diameter of slice, 9".80.
1	3 2	_			H 1 1־ J	L		i		
Rings.	Present mean diameters.	Strains.		Stresses per square inch.	
		Tension.	Compres- sion.	Tension.	Compres- sion.
	Inches. 4.8790 5.6523 9.64635 10.33275	Inch.	Inch.	Pounds.	Pounds.
			. 00515		27,300
		.0045		14,000	
					
					
RINGS ALL DETACHED.
	5.65745 9.64185