Our heat treat fixtures correct the distortion that results from some casting processes. To achieve this, we build a fixture to replicate the original size and shape of the distorted part. The foundry loads the problem part into our custom fixture, and places it in an oven heated to very high temperatures. The fixture, typically made from 316 stainless steel, expands at a higher rate than the cast part, forcing the casting into its proper shape which is maintained as the part cools.