1.1 This specification covers zinc alloys in ingot form for remelting for the manufacture of Spin Castings as specified and designated, as shown in Table 1. Four alloy compositions are specified, designated as follows:

Common	UNS
Spin Casting Alloy SC-A	...
Spin Casting Alloy SC-B	...
Spin Casting Alloy SC-C	...
ZA-73	...

1.2 Zinc alloys #2, #3, #5, and ZA-8 specified in Specification B 240 are also used in the spin casting process.

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.

TABLE 1 Chemical and North American Color Code Requirements

^A Per Practice B 908.

^B For purposes of acceptance and rejection, the observed value or calculated value obtained from analysis should be rounded to the nearest unit in the last right-hand place of figures, used in expressing the specific limit in accordance with the rounding procedure prescribed in Practice E 29.