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356 T6 as far as I know has been used mainly for cylinder head castings. My side housing castings of 356 were heat treated at the foundry. Never had a problem machining. If I had to make new side housings I probably would machine them out of 6061 T6. Material strength is not an issue in such a selection. Basically the difference is 6061(copper content) is extruded and 356 (silicon content) is cast.
FWIW.
Richard
On 6/29/2018 12:51 AM, Neil Unger 12348ung@gmail.com wrote:
Can anyone tell me how cast alloy 356 T6 compares to 6061 T6? My local foundry tells me that the "yanks" are way behind in alloy classification. Here I can get AA601 cast, but it comes out like rubber to turn. IT has to be heat treated to T6 before it can be turned. Once heat treated it is 7/8 the strength of 6061 T6. Any thoughts?? Neil.
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Richard Sohn
8029 County HWY 1087
DeFuniak Springs, FL 32433
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