17-4PH SS (SLM, H900)

17-4PH is a precipitation-hardening stainless steel optimized for additive manufacturing via selective laser melting (SLM), with H900 heat treatment applied post-build to achieve peak strength and hardness. This material combines corrosion resistance typical of stainless steels with the high strength-to-weight ratio needed for aerospace and defense applications where complex geometries and minimal material waste are critical; engineers select it when traditional wrought 17-4PH cannot economically produce the required part geometry or when the design benefits from direct AM fabrication.