What Alloys are available for gravity casting, like in sand or plaster casting?
Ferritic cast metals like casting grade iron or steel are typically gravity cast. Most die cast grade zinc can be gravity cast. It is important to note that sand, spin or plaster cast zincs strength is very different (lower) than die cast. Select aluminum alloys can be gravity cast and still produce a reasonable casting like A356 and A319. Aluminum is more difficult to gravity cast in sand because it solidifies so quickly and the pressure packing typically associated with die casting helps to add strength. For early prototype of low volumes, Investment or split mold plaster cast aluminum is also an option for low volume aluminum prototyping. Future can quote that for you to, including complete machining and inspection.
