Metallurgical Examination of Experimental 3/8 Inch Face Hardened Armor.
WATERTOWN ARSENAL LABS MA
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This UA report covers an investigation of four 38 in. experimental face hardened plates which were prepared by the Buick Motors Division of the General Motors Corporation under NRC Project 30. The plate were rolled from a low alloy steel, 94T20, gas carburized, followed by a diffusion treatment and subsequently oil quenched and tempered. Superior resistance to penetration properties were obtained coincident with satisfactory ductility characteristics. The plates were rolled from a clean steel, carburized to a considerable depth 30-35 of plate thickness and subsequently heat treated a produce an exceptionally high face hardness, a high back hardness and superior ductility in consideration of the high hardness of the core of the plates.