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Originally Posted by Mike Irwin
Grey cast iron has a tensile strength of about 50,000 psi. That would be the most likely type used for a press.
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Actually, grey cast iron starts at 20Kpsi for ASTM 20. And it is very cheap, and easy to machine. I would think this is what would be used mainly because it easy to work with.
Quote:
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Originally Posted by Mike Irwin
Depending on the exact type of aluminum and how it is hardened or annealed, varies widely.
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Very true. 380 Aluminum has 46Kpsi tensile strength and is common in die casting. Lee uses this for their Challenger single-stage press.
I was just staring at my Dillon (aluminum) and my LCT (cast iron) and I believe that the design of the LCT really doesn't put much stress on the base.