ʻO ka Alloy 725 he mea paʻakikī paʻakikī, nickel-base alloy e hāʻawi i ke kūʻē kūʻokoʻa i ke koʻikoʻi o ka ʻāʻī ʻana a me ka lua maʻamau a me ka ʻāʻī ʻana i ka wā paʻakikī.Me ka pale ʻana i ka corrosion e like me 625 a ʻoi aku ka maikaʻi ma mua o ka 718, ua manaʻo ʻia ʻo 725 no nā noi kahi e hopohopo nui ai nā kaiapuni corrosive.Hiki ke loaʻa i ka ikaika hua (0.2% offset) ma luna o 120 ksi (827 MPa) ma o ka ʻelemakule me ka hana ʻole ʻana i ka mahana a i ʻole ke anu.He mea koʻikoʻi ka hiki ke hoʻopaʻakikī i ka ua ma nā noi kahi e pale ai ka nui o ka ʻāpana nui a i ʻole ke ʻano paʻakikī i ka hana mahana.
Alloy | % | Ni | Cr | Fe | Mo | P | Nb | C | Mn | Si | S | Al | Ti |
725 | Min. | 55.0 | 19.0 | kaulike | 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 |
ʻO ka mānoanoa | 8.3 g/cm³ |
Lae hehee | 1271-1343 ℃ |
Kūlana | 0.2% Ka ikaika hua | ʻO ka ikaika ʻoi loa | % Hooloihi i 4D | % Hoemi o Wahi | ʻO Brinell paʻakikī HB | HRC | |||
ksi | MPa | ksi | MPa | Ft.-lbs | J | ||||
Hoʻoponopono Annealed | 47 | 324 | 117 | 806 | 70 | 72 | - | - | 28 |
Solution Annealed + Aged | 134 | 923 | 186 | 1282 | 33 | 51 | 87 | 118 | 35 |
Bar/Rod | Uea |
ASTM B 805, ASME Code Case 2217,SMC kikoʻī HA91, ASME Code Case 2217 | ASTM B 805, ASME Code Case 2217 |
•lron-nickel-chromium-molvbdenum-niobium based alloy, kū'ē maikaʻi i kahi ākea o nā kinikona corrosive.Kūleʻa loa i ka ʻinoʻino, ka lua, a me ke koʻikoʻi ka pohā i loko o ke kaiapuni i loaʻa ke kalapona ʻokikene, chlorine a me ka hydrogen sulfide. ʻOi aku ka maikaʻi o ka pale ʻana i ka corrosion no nā kaiapuni i loaʻa i nā kinikona acidic.
•ʻO ke kūpaʻa corrosion maikaʻi ma nā noi wela kiʻekiʻe.e like me ka aila a me ka hana kinoea.kahi maikaʻi ke kūpaʻa ʻana o ka alloy i ka H2S corrosion.
ʻO nā bearings a me nā ʻāpana ʻē aʻe no nā mea hana e koi ai i ke kūpaʻa kiʻekiʻe i nā kemika acidic a i ʻole kaiapuni.Nā ʻāpana a i ʻole equioment i hoʻohana ʻia i nā kūlana moana