You’re designing a plastic part that must maintain specific loadbearing properties at 100C. Is that 100C for a very short time, or continuously? What is the environment the part will be used in? What about exposure to moisture, automotive fluids or other chemical environments? There is data available to help you solve those puzzles, but you probably won’t find too much of relevance on a typical data sheet. And the answers vary by plastic type because of variations in polymer chemistry. And they also differ by type of plastic compound, that is the base material plus its additives, ranging from reinforcement and heat stabilizers to pigments and flame retardants. Design factors, such as ribs, as well as molding conditions can also affect a part’s fitness for a given application. And by the way, your Chief Technology Officer just announced a corporate drive to “commonality” that may limit your options.