When is a savings on metal, that might be possible with lower quality alloy, justified?
A. Quality metal is the foundation for good castings. Even a chemical analysis does not fully define all the metal quality specifications that are necessary for good die casting. Low-cost, low-quality metal cannot be expected to meet all die casting requirements. For example, when aluminum or magnesium alloy does not meet established criteria, machining may be more difficult or surface corrosion accelerated. When zinc alloy does not meet established criteria, mechanical properties important in field use will be progressively and seriously reduced in use with time.
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