INTERNAL STRAINS IN GUN FORGINGS.
290
Tube 11784 B,.
Breech Slice.
After annealing 7 feet of the breech at 650° F.
State of internal strains and stresses at different phases of the slice.
SLICE INTACT.
Interior diameter of slice, 4".80; exterior diameter of slice, 10".42.
Rings.	Present mean diameters.	Strains.		Stresses per square inch.	
		Tension.	Compres- sion.	Tension.	Compres- sion.
1		Inches. 4.96455 5.6582 9.6530 10.2646	Inch.	Inch. .0032 .0025	Pounds.	Pounds. 19,400 13,300
2					
3			.00315 .00015		9,800 400	
4						
					
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Interior diameter of slice, 5".50; exterior diameter of slice, 9".80.
Rings.	Present mean diameters.	Strains.		Stresses per square inch.	
		Tension.	Compres- sion.	Tension.	Compres- sion.
	Inches. 4.96775 5.65745 9.65265 10.26445	Inch.	Inch.	Pounds.	Pounds.
2				.00325		17,200
3			.0028		8,700	
					
					
ALL RINGS DETACHED.
	5.6607 9.64985