Accession Number : ADA954951

Title :   Metallurgical Examination of Flame Hardened Gun Shield Manufactured by Continental Foundry & Machine Company.

Descriptive Note : Final rept.,

Corporate Author : WATERTOWN ARSENAL LABS MA

Personal Author(s) : Yoffa,M.

Report Date : 12 FEB 1945

Pagination or Media Count : 10

Abstract : Metallurgical examination was made on a 5 in. thick section of a flame hardened gun shield produced by the Continental Foundry & Machine Co. from Heat No. 6479, Pattern E-6180, Serial 504 and four 3 in. thick flame hardened cast plates manufactured by the same company. All flame hardened pieces had poor metallurgical properties. The fact that a 3 1/2 in. thick section of the flame hardened gun shield had the ability to cause breakage of the 75mm AP M72 projectile may have been due to impacts at appreciable obliquity. (A minimum of breakage was noted when the 3 in. thick flame hardened plate was tested with these projectiles at 0 obliquity.) Under the attack of undermatching uncapped and capped 37mm AP projectiles, 3 in. thick falme hardened cast plate offers greater resistance to penetration than 3 in. thick homogeneous plate. No correlation was made between the poor metallurgical properties of the flame hardened gun shield and the ballistic tests.

Descriptors :   BALLISTICS, FLAMES, GUNS, HARDENING, METALLURGY, PENETRATION, PROJECTILES, RESISTANCE, SHIELDING, TEST METHODS, THICKNESS

Subject Categories : Metallurgy and Metallography
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE