Metallurgical Examination of Hull Bow Casting, Serial Number 134 for Medium Tank M4, Manufactured by American Steel Foundries
WATERTOWN ARSENAL MA
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The object of this study was to determine if the interior ballistic properties of the casting are traceable to unsatisfactory metallurgical characteristics. It was conclude that 1 The poor ballistic properties of the case hull front section are due to a combination of low hardness and poor impact properties resulting from incomplete quench hardening. 2 The incomplete quench hardening is traceable to the use of a steel of insufficient hardenability to adequately quench harden through the section thickness.
- Metallurgy and Metallography