17-4PH ndi mpweya wa chromium-nickel-copper woumitsa chitsulo chosapanga dzimbiri cha martensitic. Gulu lachitsulo chosapanga dzimbiri lili ndi mphamvu zambiri, kuuma komanso kukana dzimbiri. The makina katundu ndi bwino ndi kutentha Chithandizo ndi compressive mphamvu mpaka 1100-1300 MPa (160-190 ksi) angapezeke. Gululi silingagwiritsidwe ntchito pa kutentha pamwamba pa 300 ° C (572 ° F) kapena kutentha kwambiri. Ili ndi kukana bwino kwa dzimbiri kumlengalenga komanso kusungunula ma acid kapena mchere, ndipo kukana kwake kwa dzimbiri kumafanana ndi 304.

17-7PH ndi austenitic-martensitic mpweya woumitsa zitsulo zosapanga dzimbiri zopangidwa pamaziko a 18-8CrNi, omwe amadziwikanso kuti owongolera gawo losintha chitsulo chosapanga dzimbiri. 17-7PH zitsulo zosapanga dzimbiri ndi wosakhazikika austenitic bungwe pambuyo olimba njira Chithandizo, ndi zabwino pulasitiki toughness ndi machinability, pambuyo tempering, kuti austenite mpweya wa carbides pambuyo kusintha zikuchokera, ndiyeno mwa martensitic kusintha ndondomeko, ambiri a bungwe amasandulika kukhala otsika mpweya kupsya mtima ndondomeko ndi kulimba bwino. Pambuyo kutentha, ndi austenite mpweya carbide zikuchokera amasintha, ndiyeno mwa martensitic kusintha ndondomeko, ambiri a bungwe amasandulika kukhala otsika mpweya mtima martensite ndi toughness wabwino, ndipo ali wabwino makina katundu pa sing'anga kutentha. Kukana kwa dzimbiri kwa 17-7PH kuli bwino kuposa chitsulo chosapanga dzimbiri cha martensitic.