Any solid metal that can be melted can be cast. Foundries are the factories that do this casting work, developing expertise with a handful of metals and methods, and designing standard products to maximize value and efficiency in production. Metals and casting methods influence each other: the best casting choice for a product is influenced by how its metal will behave in molten, cooling, and solid states. For these dependencies, a foundry’s specialties are part of the determination of what sort of products they make. The foundry doing diecast children’s toys is not generally the same foundry that produces high quality engine parts.