... max Cu 0.004%max 500g magnesium metal with purity 99.90%minThe BEST price for Magnesium Metal 99.9%, Mg Alloy( ... AM50A,AZ91D,AE42, etc.), Mg powder & Mg Casting, etc.The magnesium metal 99 ... temperature at which magnesium burns makes it a useful tool for starting emergency fires during outdoor recreation. Other related uses include flashlight, photography ...