I-17-4PH yi-chromium-nickel-copper precipitation eyenza lukhuni intsimbi ye-martensitic. Eli bakala lensimbi engenasici libonakaliswa ngamandla aphezulu, ukuqina kunye nokumelana nokubola. Iimpawu zomatshini ziphuculwe ngokutshisa Unyango kunye namandla oxinzelelo ukuya kwi-1100-1300 MPa (160-190 ksi) inokufezekiswa. Eli bakala alinakusetyenziswa kumaqondo obushushu angaphezu kwama-300°C (572°F) okanye kumaqondo aphantsi kakhulu. Inokumelana ne-corrosion efanelekileyo kwi-atmospheric kunye ne-dilute acids okanye iityuwa, kwaye ukuxhathisa kwayo kokuhlwa kuthelekiseka naleyo ye-304.

I-17-7PH i-austenitic-martensitic precipitation iqinisa insimbi engenasici eyenziwe ngesiseko se-18-8CrNi, eyaziwa ngokuba yi-controlled phase change steel stainless steel. 17-7PH steel stainless umbutho engazinzanga austenitic emva isisombululo esiluqilima Unyango, kunye nokuqina kakuhle zeplastiki kunye machinability, emva tempering, ukuze precipitation austenite of carbides emva kotshintsho ekubunjweni, kwaye ke ngokusebenzisa inkqubo inguqu martensitic, uninzi lombutho iguqulwa ibe yinkqubo ephantsi carbon tempering kunye nokuqina okulungileyo. Emva kokufudumala, i-austenite precipitation carbide composition compositions, kwaye emva koko ngenkqubo yokuguqulwa kwe-martensitic, ininzi yombutho iguqulwa ibe yi-carbon tempered martensite ephantsi kunye nokuqina okulungileyo, kwaye ineempawu ezilungileyo zomatshini kwiqondo lokushisa eliphakathi. I-17-7PH ukuxhathisa i-corrosion ingcono kune-martensitic yensimbi engenasici.