1.1 This specification covers die castings produced from five alloys whose primary metal is either lead or tin. lists the designations for these alloys as well as their chemical compositions.1.2 The values stated in either SI units or inch-poun This specification covers lead- and tin-alloy die castings. The chemical composition shall conform to the required values of tin, antimony, lead, copper, arsenic, zinc, and aluminum. Chemical analysis shall be taken from the material by drilling, sawin