See Stainless Steel Tolerances
Stainless Perforated Sheet 304 offers a great mix of strength, corrosion resistance in most situations outside of marine environments, and light weight. If your project is in a marine environment, choose 316 stainless. 304, the most popular stainless alloy in the world, maintains its properties in high temperature situations. It is typically used in aerospace, food and beverage industry, pressure containers, architectural designs and trim, cryogenic applications, and chemical processing equipment.
Perforated Sheet is popular for filters, covers, artwork, and security grates.