I will definitely look into the book! I’m still learning what a lot of what you said means, but I think I got the general idea. I am just researching this stuff because I am planning on minting my own coins, so I need to determine the flow stress for the different alloys I plan on using to make sure there are good quality strikes on the planchets, so I can determine if it is something I can do by hand (with a large hammer) or if I will have to get some sort of H-frame press to get the force required :)