Alloy 725 ndi mvula yowumitsa, nickel-base alloy yomwe imapereka kukana kwapadera kupsinjika kwa dzimbiri komanso kuphulika kwapang'onopang'ono komanso kuwonongeka kwapang'onopang'ono muzaka zolimba.Ndi kukana kwa dzimbiri kofanana ndi 625 komanso kupitilira kwa 718, 725 imaganiziridwa ngati ntchito pomwe malo owononga kwambiri amadetsa nkhawa.Mphamvu zokolola (0.2% offset) pamwamba pa 120 ksi (827 MPa) zitha kupezeka mwa kukalamba popanda kutentha kapena kuzizira koyambirira.Kutha kwa kuuma kwa mvula ndikofunikira makamaka m'malo omwe kukula kwa magawo akulu kapena mawonekedwe osokonekera amalepheretsa kugwira ntchito mofunda.
Aloyi | % | Ni | Cr | Fe | Mo | P | Nb | C | Mn | Si | S | Al | Ti |
725 | Min. | 55.0 | 19.0 | bwino | 7.0 | - | 2.75 | - | - | - | - | - | 1.0 |
Max. | 59.0 | 22.5 | 9.5 | 0.015 | 4.0 | 0.03 | 0.35 | 0.2 | 0.01 | 0.35 | 1.7 |
Kuchulukana | 8.3g/cm³ |
Malo osungunuka | 1271-1343 ℃ |
Mkhalidwe | 0.2% Mphamvu Zokolola | Ultimate Tensile Mphamvu | % Kukula ku 4d | % Kuchepetsa Malo | Brinell kuuma HB | Mtengo wa HRC | |||
ksi | MPa | ksi | MPa | Ft.-lbs | J | ||||
Yankho Annealed | 47 | 324 | 117 | 806 | 70 | 72 | - | - | 28 |
Yankho Annealed + Okalamba | 134 | 923 | 186 | 1282 | 33 | 51 | 87 | 118 | 35 |
Chipinda / ndodo | Waya |
ASTM B 805, ASME Code Case 2217,Mafotokozedwe a SMC HA91, ASME Code Case 2217 | ASTM B 805, ASME Code Case 2217 |
•lron-nickel-chromium-molvbdenum-niobium based alloy, kukana bwino kwamitundu yambiri yamafuta owononga.Imalimbana kwambiri ndi dzimbiri, pitting, ndi kupsinjika maganizo m'malo okhala ndi carbon dioxide, chlorine ndi hydrogen sulfide. Kukana kwapadera kwa corrosion kwa malo omwe ali ndi mankhwala a acidic.Good corrosion resistance for brine ndi madzi a m'nyanja.
•Good dzimbiri kukana pa ntchito kutentha mkulu.monga kupanga mafuta ndi gasi.kumene aloyi ali ndi kukana zabwino H2S dzimbiri.
Bearings ndi mbali zina za zida zomwe zimafuna kukana kwambiri ndi mankhwala acidic kapena malo.Zigawo kapena zinthu zomwe zimagwiritsidwa ntchito m'nyanja