... is roughly 700°C when casting aluminum and 650°C when casting magnesium. The use of vacuum casting technique is a must ... could be like this: 1.mould making 2.casting ( die casting, sand casting, gravity casting, low pressure casting), 3.welding, (optional) 4.surface treatment, ... delivery. Material could be aluminium, brass, copper, iron, steel, magnesium, zinc, etc. B. Or the process could be like this ...