China Calcium Aluminium Alloys Factory Directly Supply. Harvest Enterprise is Calcium Aluminium Alloys manufacturer and supplier in China. Calcium aluminum alloy has metallic luster, lively properties, and the fine powder is easy to burn in the air. It is mainly used as an intermediate alloy, refining and reducing agent in metal smelting. Products are supplied in the form of natural blocks, and can also be processed into products of different particle sizes according to user needs. Calcium-aluminum alloys generally contain 70-75% calcium, 25-30% aluminum, 80-85% calcium, 15-20% aluminum and 70-75% aluminum, 25-30% calcium..