17-4PH Stainless Steel (L-PBF, Colibrium Additive Stainless Steel 17-4PH, as-built)

Colibrium Additive Stainless Steel 17-4PH, as-built, is that maker's grade of 17-4PH precipitation-hardening stainless steel made by laser powder bed fusion and not heat treated after the build. Rapid solidification leaves a fine cellular, largely martensitic structure that can hold retained austenite and lacks the copper-rich strengthening precipitates, so its properties differ from aged material and vary with build direction. Parts carry residual stress and a rough surface and need supports. They are normally stress relieved, solution treated and aged, and machined on critical surfaces. Finished parts serve as tooling inserts, pump and valve components, and brackets that need strength with corrosion resistance. Every value on this page is read from Colibrium Additive's own material data sheet — quoted, cited and dated — and is the maker's statement about printed material, not a measurement by MatWorld; none has yet been reviewed by a person.