Nickel is a primary cost driver for stainless steel and superalloys.
About C276|Hastelloy C-276, same as 276. See 276 for details. The classic universally corrosion-resistant nickel superalloy.
About Sheet|Thin flat stock, generally under 3/16", used for stamping, bending, shearing, and laser/plasma cutting. It's the starting material for enclosures, panels, brackets, and formed sheet metal parts.