15-5 PH igwe anaghị agba nchara bụ martensitic mmiri ozuzo-ike igwe anaghị agba nchara nwere ihe dị ka 15% Chromium na 5% nickel. O nwere ike dị elu, isi ike dị elu, yana ezigbo nguzogide corrosion. Enwere ike ịbawanye ike site na otu ọgwụgwọ okpomọkụ dị ala. Tụnyere 17-4 PH, ọ na-enye mma transverse siri ike na ductility; mma n'ibu Njirimara na ibu cross-ngalaba, na mma forgeability. Ọ bụ ngwa ngwa weldable. Enwere ike ịme ya na nke ọ bụla n'ime ọnọdụ okpomọkụ dị na ọkwa a.