1.1 ,This specification covers the requirements for zinc-5 ,% aluminum coated, by the hot-dip process on iron and steel products. The coating may also contain small amounts of elements other than zinc and aluminum that are intended to improve processing and the characteristics of the coated product. These metallic coatings include zinc- 5 ,%-aluminum (Zn-5Al), zinc-5 ,%-aluminum-mischmetal (Zn-5Al-MM) and zinc-5 ,%-aluminum-magnesium (Zn- %Al-Mg).