Alloy 725 waa da'da la adkeyn karo, aluminium-saldhig nikkel ah oo bixisa iska caabin aan caadi ahayn oo dillaaca daxalka walaaca iyo godadka guud iyo daxalka daxalka ee da'da adag.Iyada oo iska caabin daxalka la mid ah 625 oo ka sarreeya kan 718, 725 ayaa loo tixgeliyey codsiyada halka jawiga xun xun ay walaac ka qabaan.Awood wax-soo-saar (0.2% la dhimay) oo ka sarreeya 120 ksi (827 MPa) waxaa lagu heli karaa da'da iyada oo aan horay loo shaqeyn diiran ama qabow.Awooda adkeynta roobabku waxay si gaar ah muhiim ugu tahay codsiyada halka cabbirka ballaaran ama qaabka qallafsan uu diidayo in si diiran loo shaqeeyo.
Alloy | % | Ni | Cr | Fe | Mo | P | Nb | C | Mn | Si | S | Al | Ti |
725 | Min. | 55.0 | 19.0 | dheelitirnaan | 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 |
Cufnaanta | 8.3 g/cm³ |
barta dhalaalaysa | 1271-1343 ℃ |
Xaalada | 0.2% Xoogga Wax-soosaarka | Xoogga ugu Dambeeya | % Dheeraynta ku jira 4D | % Dhimista Aagga | adkaanta brinell HB | HRC | |||
ksi | MPa | ksi | MPa | Ft.-lbs | J | ||||
Xalka waa la tirtiray | 47 | 324 | 117 | 806 | 70 | 72 | - | - | 28 |
Xalka waa la tirtiray + Waayeel | 134 | 923 | 186 | 1282 | 33 | 51 | 87 | 118 | 35 |
Baar/Usha | Silig |
ASTM B 805, ASME Code Case 2217,Faahfaahinta SMC HA91, Kiiska Koodhka ASME 2217 | ASTM B805, ASME Code Case 2217 |
•lron-nickel-chromium-molvbdenum-niobium alloy ku salaysan, iska caabin wanaagsan oo tiro balaadhan oo ah kiimikooyinka daxalka.Aad u adkeysi badan u leh daxalka, goynta, iyo dilaaca diiqada deegaanka oo ay ku jiraan kaarboon dioxide, chlorine iyo hydrogen sulfide. Iska caabbinta daxalka aad u wanaagsan ee bay'ada ka kooban kiimikooyinka aashitada ah. Iska caabbinta daxalka wanaagsan ee brine iyo biyaha badda.
•Iska caabbinta daxalka wanaagsan ee codsiyada heerkulka sare.sida saliida iyo gaaska soo saarista.halkaas oo daawaha uu leeyahay iska caabin wanaagsan ee daxalka H2S.
Gawaarida iyo qaybaha kale ee qalabka kuwaas oo u baahan iska caabin sare ee kiimikooyinka ama deegaanka.Qaybaha ama equioment loo isticmaalo xaaladaha badda