Alloy 725 ose timu maaa, nickel-base u'amea e maua ai le tetee fa'apitoa i fa'amamafa a'a ta'eta'e ma fa'a'a'a'a'a pitting ma fa'a'a'a'a'a i le tausaga ma'a'a tulaga.Faatasi ai ma le tete'e o le pala e tutusa ma le 625 ma sili atu nai lo le 718, 725 e iloiloina mo talosaga e matua'i afaina ai siosiomaga.O le malosi e maua mai ai (0.2% offset) i luga atu o le 120 ksi (827 MPa) e mafai ona maua i le matua e aunoa ma le galue muamua o le mafanafana po o le malulu.Ole malosi ole fa'amalo ole timuga e taua tele ile fa'aoga ole lapo'a lapopo'a po'o foliga lavelave e taofia ai le galue mafanafana.
Alloy | % | Ni | Cr | Fe | Mo | P | Nb | C | Mn | Si | S | Al | Ti |
725 | Min. | 55.0 | 19.0 | paleni | 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 |
Malosi | 8.3 g/cm³ |
Liu liusuavai | 1271-1343 ℃ |
Tulaga | 0.2% Malosi e maua | Malosi'i Sili | % Fa'aumi i le 4D | % Fa'aitiitiga o le Eria | Brinell maaa HB | HRC | |||
ksi | MPa | ksi | MPa | Ft.-lbs | J | ||||
Fofo Fa'amau | 47 | 324 | 117 | 806 | 70 | 72 | - | - | 28 |
Fofo Fa'amau + Aged | 134 | 923 | 186 | 1282 | 33 | 51 | 87 | 118 | 35 |
Pa/Ai | Uaea |
ASTM B 805, ASME Code Case 2217,SMC fa'amatalaga HA91, ASME Code Case 2217 | ASTM B 805, ASME Code Case 2217 |
•lron-nickel-chromium-molvbdenum-niobium fa'avae u'amea, lelei le tete'e atu i le tele o vaila'au fa'aleagaina.E maualuga le tete'e i le pala, pitting, ma le atuatuvale ta'e i totonu o le siosiomaga o loo i ai carbon dioxide, chlorine ma hydrogen sulfide. Outstanding corrosion tetee mo le siosiomaga o loo i ai vailaau acidic.Good corrosion tetee mo brine ma le sami.
•Lelei fa'a'ele'ele fa'aoga ile maualuga ole vevela.pei ole gaosiga ole suauu ma le kesi.o lo'o i ai le fa'afefeteina lelei i le H2S pala.
Bearings ma isi vaega mo meafaigaluega e manaʻomia ai le maualuga o le tetee atu i vailaʻau faʻamaʻi poʻo siosiomaga.O vaega po'o mea e fa'aaogaina i tulaga o le sami