I need a k-factor list that lists a specific number for every conceivable type of metal (and alloy) and thickness for air bending. I use Creo at work, which uses Y-factor as its default, which I know equals K-factor times Pi divided by 2. But I need to know a specific k-factor number for the specific material and thickness we're using before I can accurately determine the Y-factor. And we work with all types of materials including 5052, 6061, 2024, 7075, mild and stainless steel sheets and plates. Does anyone know of any such repository of information, or maybe a calculator/spreadsheet that someone has created somewhere?