1.1This specification covers a commercial zinc-aluminum alloy in ingot form for remelting for the manufacture of thin wall pressure die castings as designated and specified in Table 1.

TABLE 1 Chemical and North American Color Code Requirements

Common Name	HF Alloy^A^,^B^,^C
UNS	to be assigned
Color Code^D	Red/Brown
Element
Aluminum	4.3-4.7
Magnesium	0.005-0.012
Copper, max	0.035
Iron, max	0.03
Lead, max	0.003
Cadmium, max	0.002
Tin, max	0.001
Zinc^E	Remainder

^A Zinc alloy ingots for die casting may contain nickel, chromium, silicon, and manganese in amounts of up to 0.01, 0.01, 0.01, and 0.01 %, respectively. No harmful effects have ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses are not required for these elements.

^B The last digit of a UNS number differentiates between alloys of similar composition. UNS designations for ingot and casting versions of an alloy were not assigned in the same sequence for alloys.

^C 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 specified limit, in accordance with the rounding procedure prescribed in Practice E29.

^D Refer to Practice B908 (Note: Colors indicated are for North American applications.)

^E Determined arithmetically by difference.

1.2Systems of nomenclature used to designate zinc and zinc-aluminum (ZA) alloys used for casting are described in Appendix X1.

1.3The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4This 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.