Saky uamea Martensitic uamea u'amea o se ituaiga o chromium uʻamea uʻamea lea e tausia microstructure martensitic i le vevela o le potu, o ona meatotino e mafai ona fetuutuunai e togafitiga vevela (quenching ma tempering). I se tulaga lautele, o se ituaiga o uʻamea faʻamalosi faʻamalosi. Ina ua uma tineia, tempering ma annealing faagasologa, O le maaa o le 440 uʻamea uʻamea ua matua faaleleia nai lo isi uʻamea stainless ma vevela. E masani ona faʻaaogaina i le gaosiga o le faʻatau, tipi mea faigaluega, poʻo le palasitika palasitika e manaʻomia ai ni uta maualuga ma faʻafefeteina i lalo o tulaga pala. American standard 440 series stainless steel e aofia ai: 440A, 440B, 440C, 440F. O le kaponi o loʻo i totonu o le 440A, 440B ma le 440C faʻasolosolo faʻateleina. 440F (ASTM A582) o se ituaiga o u'amea tipi fua ma S anotusi faaopoopo i luga o le faavae o le 440C.
Vasega Tutusa O le 440 SS
| Amerika | ASTM | 440A | 440B | 440C | 440F |
| UNS | S44002 | S44003 | S44004 | S44020 | |
| Iapani | JIS | SUS 440A | SUS 440B | SUS 440C | SUS 440F |
| Siamani | DIN | 1.4109 | 1.4122 | 1.4125 | / |
| Saina | GB | 7Cr17 | 8Cr17 | 11Cr17 9Cr18Mo | Y11Cr17 |
Fa'ainumera Fa'ainumera O le 440 SS
| togi | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 440A | 0.6-0.75 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440B | 0.75-0.95 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440C | 0.95-1.2 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440F | 0.95-1.2 | ≤1.00 | ≤1.25 | ≤0.06 | ≥0.15 | 16.0-18.0 | / | (≤0.6) | (≤0.5) |
Manatua: o tau o loʻo i totonu o puipui e faʻatagaina ma e le faʻamalosia.
Malosi ole 440 SS
| togi | Ma'a'a, Fa'asusu (HB) | Togafitiga vevela(HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
E tutusa ma u'amea u'amea masani, Saky sila 440 faasologa Martensite uʻamea uʻamea uiga o le faamaaaina e ala i tineia, ma e mafai ona maua le tele o mea tau masini e ala i togafitiga vevela eseese. I se tulaga lautele, o le 440A e sili ona lelei le faʻamalosi ma le maualuga, ma o lona malosi e maualuga atu nai lo le 440B ma le 440C. 440B e maualuga atu le maaa ma le maaa nai lo le 440A ma le 440C mo meafaigaluega tipi, fua mea faigaluega, bearings ma valve. O le 440C o loʻo i ai le maaa sili ona maualuga o uʻamea uma ma le uʻamea faʻafefe mo mea faigaluega tipiina maualuga, nozzles ma bearings. 440F o se uʻamea tipi fua ma faʻaaogaina i lathes otometi.
Taimi meli: Iul-07-2020