Why is there an upper limit on the dimensions of high-alloy forgings?
Thread Content
For GB150.2 materials and high-alloy forgings, why is there an upper limit on dimensions? What to do if it exceeds? I would like to create a new material in SW6 now and then perform calculations using an allowable stress of 300. I’m not sure if this is possible. My size is 308, so what about 400 in thickness? The thickness differs greatly, and the allowable stress also varies significantly; does that mean this material cannot be used? Is there still some way to do the calculation?
Thick materials; limited capabilities in heat treatment processes; uneven performance
It is best not to use this type; the reason, as mentioned for sofas, is that the heat treatment is uneven, which prevents consistent mechanical properties, especially impact toughness. However, if it must be used, I personally think it would be possible to request the forging manufacturer to provide some verification documents, such as impact toughness at a 1/2 thickness level, as well as grain size test reports.