1.1 This specification covers magnesium-alloy sand castings designated as shown in .1.2 The values stated in inch-pound units are to be regarded as the standard. The SI values in parentheses are provided for information only.This standard This specification covers magnesium-alloy sand castings. The castings shall conform to the chemical composition limits specified. The castings may be subjected to such heat treatment as deemed necessary to produce material that will conform to the requ