1.4410 vs . 316 stainless hlau: Dab tsi yog qhov txawv?
Jan 19, 2026
Tso lus
Thaum xaiv stainless hlau rau marine, tshuaj, zog, los yog cov qauv siv, cov neeg yuav khoom feem ntau piv EN 1.4410 (Duplex 2507) nrog 316 stainless hlau.Txawm hais tias ob qho tib si muaj kev tiv thaiv corrosion, lawv cov kev ua tau zoo, cov nqi ua haujlwm, thiab daim ntawv thov txawv txawv.
Phau ntawv qhia no qhia meej, cov ntaub ntawv - tsav kev sib piv los pab cov engineers thiab pab pawg muag khoom txiav txim siab.
Dab tsi yog en 1.4410 khoom?
EN 1.4410 yog super duplex stainless hlau, tseem hu ua Alloy 2507, UNS S32750, los yog F53, muaj lub zog tshwj xeeb thiab zoo heev corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv chloride - nplua nuj ib puag ncig (xws li dej hiav txwv). Nws yog qhov tsim nyog rau kev thov rau kev thov hauv kev lag luam xws li roj thiab roj, kev ua tshuaj lom neeg, thiab marine engineering. Nws lub zog yog ob npaug ntawm tus qauv austenitic stainless hlau 316.
Dab tsi yog 316 qib stainless hlau?
316 qib stainless hlau yog ib qho nrov, corrosion-resistant austenitic steel, hu ua "marine- qib," muaj chromium, npib tsib xee, thiab molybdenum, uas muab nws superior tiv thaiv chlorides, dej ntsev, thiab tshuaj piv rau 304 stainless hlau, ua rau nws zoo tagnrho rau marine, kev kho mob, khoom noj khoom haus kev lag luam.
1.4410 vs . 316 stainless hlau: Khoom Txheej txheem cej luam
| Qib | Txuj | UNS | Hom |
|---|---|---|---|
| 1.4410 | TS EN 10088 | S32750 | Super Duplex Stainless Hlau |
| 316 | ASTM / AISI | S31600 | Austenitic Stainless hlau |
1.4410 vs . 316 stainless hlau: Tshuaj muaj pes tsawg leeg
| Khoom (%) | 1.4410 (S32750) | 316 (S31600) |
|---|---|---|
| Chromium (Cr) | 24.0 – 26.0 | 16.0 – 18.0 |
| Nickel (Ni) | 6.0 – 8.0 | 10.0 – 14.0 |
| Molybdenum (hli) | 3.0 – 5.0 | 2.0 – 3.0 |
| Nitrogen (N) | 0.24 – 0.32 | Tsawg dua lossis sib npaug li 0.10 |
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.03 | Tsawg dua los yog sib npaug li 0.08 |
| PREN* | Ntau dua lossis sib npaug li 40 | ≈ 23–25 |
1.4410 vs . 316 stainless hlau: Mechanical Properties
| Khoom | 1.4410 | 316 |
|---|---|---|
| Yield zog (MPa) | Ntau dua lossis sib npaug li 550 | Ntau dua lossis sib npaug rau 205 |
| Tensile zog (MPa) | 750 – 950 | 515 – 690 |
| Elongation (%) | Ntau dua lossis sib npaug li 15 | Ntau dua lossis sib npaug li 40 |
| Hardness (HB) | Tsawg dua lossis sib npaug li 310 | Tsawg dua lossis sib npaug li 217 |
1.4410 vs . 316 stainless hlau: Corrosion Resistance
Nyob rau hauv cov nqe lus ntawm corrosion kuj, 1.4410 (UNS S32750 super duplex stainless hlau) ho outperforms 316 stainless hlau, tshwj xeeb tshaj yog nyob rau hauv chloride - muaj ib puag ncig. Lub pitting kuj sib npaug tus naj npawb (PREN) ntawm 1.4410 feem ntau yog ntau dua lossis sib npaug rau 40, thaum ntawm 316 tsuas yog 23-25, qhia tias 1.4410 muaj siab dua rau pitting thiab crevice corrosion.
| Ib puag ncig | 1.4410 | 316 |
|---|---|---|
| Chloride dej hiav txwv | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Pitting corrosion | Zoo heev | Nruab nrab |
| Kev txhim kho corrosion | Zoo heev | Txwv tsis pub |
| Kev nyuaj siab corrosion cracking | Kev tiv thaiv siab heev | Nyiag |
| Cov tshuaj acidic | Zoo heev | Zoo |
Cov ntaub ntawv kuaj thiab teb qhia tau hais tias 316 stainless hlau yuav muaj kev cuam tshuam hauv cheeb tsam thaum cov tshuaj chloride ntau tshaj 1000 ppm, thaum 1.4410 tuaj yeem tiv taus dej hiav txwv corrosion (chloride concentration kwv yees li 19000 ppm) nyob rau hauv ib txwm ua haujlwm yam tsis muaj pitting. Tsis tas li ntawd, duplex microstructure ntawm 1.4410 muab nws zoo heev tiv thaiv kev nyuaj siab corrosion cracking (SCC), whereas 316 stainless hlau yog kuj raug rau kev nyuaj siab corrosion cracking ntawm kub siab tshaj 50-60 degree.
1.4410 vs . 316 stainless hlau: Daim ntawv thov
1.4410 feem ntau yog siv nyob rau hauv offshore thiab seawater daim ntaub ntawv uas cov tshuaj chloride nce mus txog ~ 19,000 ppm, thaum 316 stainless hlau yog tsuas yog siv nyob rau hauv kev lag luam thiab marine ib puag ncig nrog chloride concentrations feem ntau qis dua 1,000 ppm.
Xa kev nug