17-4PH yog chromium-nickel-copper nag lossis daus hardening martensitic stainless hlau. Qib no ntawm stainless hlau yog tus cwj pwm los ntawm lub zog siab, hardness thiab corrosion kuj. Cov khoom siv kho tshuab yog txhim kho los ntawm kev kho cua sov thiab compressive zog txog li 1100-1300 MPa (160-190 ksi) tuaj yeem ua tiav. Cov qib no tsis tuaj yeem siv rau qhov kub siab tshaj 300 ° C (572 ° F) lossis ntawm qhov kub qis heev. Nws muaj corrosion kuj zoo rau atmospheric thiab dilute acids los yog ntsev, thiab nws corrosion kuj yog piv rau 304.

17-7PH yog austenitic-martensitic nag lossis daus hardening stainless hlau tsim los ntawm 18-8CrNi, tseem hu ua kev tswj theem hloov stainless hlau. 17-7PH stainless hlau yog tsis ruaj tsis khov austenitic lub koom haum tom qab kev daws teeb meem kev kho mob, nrog zoo yas toughness thiab machinability, tom qab tempering, kom lub austenite nag lossis daus ntawm carbides tom qab kev hloov nyob rau hauv muaj pes tsawg leeg, thiab ces los ntawm cov txheej txheem martensitic transformation, feem ntau ntawm lub koom haum yog hloov mus rau hauv ib tug tsawg carbon tempering txheej txheem nrog zoo toughness. Tom qab tempering, austenite nag lossis daus carbide muaj pes tsawg leeg hloov, thiab tom qab ntawd los ntawm cov txheej txheem martensitic transformation, feem ntau ntawm lub koom haum tau hloov mus rau hauv ib qho tsis tshua muaj carbon tempered martensite nrog zoo toughness, thiab muaj zoo mechanical zog ntawm nruab nrab kub. 17-7PH corrosion kuj zoo dua li cov martensitic stainless hlau.