Thin walled steel cartridge case

Details Thin walled steel cartridge case Thin walled steel cartridge case

1976-02-05

1977-08-16

Tudor, Harold

Ammunition and explosives

Igniting devices and systems

75123R, F42B 928

Patent

active

040418685

ABSTRACT:
A thin walled steel cartridge case having a substantially larger internal volume than a conventional cartridge case. The cartridge case is fabricated from a high strength, heat treated carbon steel or boron steel and the wall contour in the head area is designed to avoid localized high stress. A low friction coating is applied to the outer surface of the cartridge case and serves to reduce stress concentrations in the head area and to reduce extraction force in the event of interference between the case and the chamber during extraction.

REFERENCES:
patent: APC340193 (1943-05-01), Landbeek
patent: 1296842 (1919-03-01), Offuth et al.
patent: 2193245 (1940-03-01), Buxton
patent: 2774283 (1956-12-01), Harvey
Steel and its Heat Treatment vol. I by Bullens, John Wiley & Sons Table II XXI-XXIII.

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