Metallurgical Examination of Ten 1 inch Face Hardened Armor Plates Manufactured by American Car and Foundry Company
WATERTOWN ARSENAL LABS MA WATERTOWN ARSENAL United States
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The results of the metallurgical examination show that all the face hardened armor plates possessed approximately the same face hardness of 444 Brinell and core hardness of 330 to 350 Brinell. The metallurgical tests included chemical analyses, harness surveys, fracture tests, hardenability, macro and microscopic examinations of plates from three heats.