SUS310S vs SUS304 Stainless hlau: Corrosion Resistance piv
Apr 03, 2025
Tso lus
Ob Qib Austenitic, txawv Corrosion txwv
SUS310S yog siab -chromium, siab-nickel austenitic stainless hlau txhais hauv JIS system, thaum SUS304 yog qhov dav - lub hom phiaj 18-8 austenitic qib. Txawm hais tias ob qho tib si yog austenitic thiab tsis yog{10}}sib nqus nyob rau hauv cov mob annealed, qhov sib txawv loj ntawm chromium thiab npib tsib xee cov ntsiab lus ua rau muaj qhov sib txawv ntawm corrosion thiab oxidation tus cwj pwm. SUS310S raug xaiv rau siab - qhov kub thiab txias kev pabcuam tshuaj lom neeg; SUS304 raug xaiv rau kev lag luam dav dav thiab khoom noj khoom haus kev sib cuag ntawm qhov kub nruab nrab.
Tshuaj muaj pes tsawg leeg (JIS G4304 / G4305)
Kev sib xyaw ua ke ntawm JIS G4304 thiab G4305 rau SUS310S thiab SUS304, hauv qhov hnyav feem pua:
| Element | SUS 310 S | SUS 304 |
|---|---|---|
| Cov pa roj carbon (C) | 0.08 max | 0.08 max |
| Silicon (Si) | 1.50 max | max 1.00 Nws |
| Manganese (Mn) | max 2.00 Nws | max 2.00 Nws |
| Phosphorus (P) | 0.045 max | 0.045 max |
| Sulfur (S) | 0.030 max | 0.030 max |
| Chromium (Cr) | 24.00-26.00 | 18.00-20.00 |
| Nickel (Ni) | 19.00-22.00 | 8.00-10.50 |
| Molybdenum (hli) | Tsis tau teev tseg | Tsis tau teev tseg |
Kev sib piv Corrosion Resistance
Oxidizing ib puag ncig: cov tuab chromium oxide passive txheej ntawm SUS310S muab oxidation tsis kam mus txog li 1200 degrees C hauv kev siv tas li, thaum SUS304 txwv rau li 870 degrees C thiab ntsuas nrawm dua li ntawd. Acidic ib puag ncig: cov ntsiab lus siab nickel ntawm SUS310S txhim kho kev tiv thaiv tsis yog -oxidizing acids xws li dilute sulfuric thiab hydrochloric acid ntawm qhov kub thiab txias, thiab nws tiv taus qhov nruab nrab ntawm sulfuric acid txog li 50% nrog rau dilute nitric acid; SUS304 resists dilute nitric acid tab sis corrodes yooj yim nyob rau hauv sulfuric los yog hydrochloric acid, tshwj xeeb tshaj yog kub thiab concentrated. Chloride ib puag ncig: qhov siab dua chromium thiab npib tsib xee ntawm SUS310S nce nws cov pitting tsis kam sib npaug, muab cov tshuaj chloride zoo dua SUS304 tab sis tseem qis dua molybdenum-cov qhab nia xws li SUS316, yog li ob qib raug txwv rau qis - chloride daim ntawv thov. Intergranular corrosion: qhov qis-carbon tsim ntawm SUS310S txo qis chromium carbide nag lossis daus thiab intergranular nres yam tsis muaj post-weld stabilization, thaum tus qauv SUS304 tuaj yeem hnov qab thaum cua sov hauv 450-850 degrees C thaum lub sij hawm vuam; rau welded 304-hom kev pab cuam, SUS304L los yog stabilized SUS321 yuav tsum tau siv.
Daim Ntawv Thov Xaiv Table
| Daim ntawv thov | Pom zoo Qib | Yog vim li cas |
|---|---|---|
| High -kub qhov cub qhov chaw, cov raj radiant, cov khoom siv hluav taws xob | SUS 310 S | Oxidation tsis kam mus txog 1200 ° C |
| Cov cuab yeej siv tshuaj rau dilute acids | SUS 310 S | High chromium thiab nickel tiv thaiv acid nres |
| Khoom noj khoom haus thiab kev kho mob machinery, khoom siv hauv chav ua noj | SUS 304 | Tus nqi -zoo rau kev pabcuam corrosion me me nrog dej thiab organic acids |
| Marine thiab seawater kev pabcuam | Tsis yog | Yuav tsum tau molybdenum{0}}cov qhab nia xws li SUS316 lossis qib duplex |
Mechanical Properties at a Glance
Hauv kev daws teeb meem -annealed mob ob qib ua tau raws li JIS minima ntawm 520 MPa tensile lub zog thiab 205 MPa yield zog (0.2% offset), nrog elongation ntawm 40% yam tsawg kawg nkaus. SUS310S kuj tseem txhim kho qhov muaj txiaj ntsig zoo hauv lub zog ntawm 800-1000 ° C, uas yog qhov laj thawj tseem ceeb uas nws tshwm sim hauv cov hluav taws xob hluav taws xob thiab qhov cub tsim qhov twg SUS304 yuav poob lub zog sai.
Cov lus nug nquag
Qhov txawv ntawm SUS310S thiab SUS304 yog dab tsi?SUS310S muaj 24-26% chromium thiab 19-22% nickel piv rau 18-20% chromium thiab 8-10.5% nickel rau SUS304. Cov ntsiab lus alloy siab dua muab SUS310S kwv yees li 300 degrees C ntau dua oxidation tsis kam thiab zoo acid tsis kam, ntawm cov khoom siv ntau dua.
Qhov kev pabcuam siab tshaj plaws ntawm SUS310S yog dab tsi?Nyob rau hauv oxidizing atmospheres SUS310S feem ntau ntsuas rau kev pabcuam txuas mus txog li 1200 degrees C thiab tuaj yeem tiv taus qhov sib cuam tshuam ntawm qhov siab dua, muab cov khoom siv thauj khoom nyob rau hauv qhov kev cia siab.
Puas yog SUS310S haum rau dej hiav txwv?Tsis yog SUS310S lossis SUS304 tsis muaj molybdenum, yog li ob qho tib si muaj kev cuam tshuam rau pitting thiab crevice corrosion nyob rau hauv chloride- nplua nuj ib puag ncig xws li dej hiav txwv; molybdenum- bearing SUS316 lossis duplex qib yuav tsum muaj nyob ntawd.
Qhov twg zoo dua, SUS310S lossis SUS304, rau siab - qhov kub ntawm qhov cub?SUS 310 S. Nws qhov ntom ntom chromium oxide nplai tseem tiv thaiv txog 1200 degrees C, thaum SUS304 ntsuas saum toj li 870 degrees C.
Puas yog SUS310S tiv thaiv intergranular corrosion tom qab vuam?Yog lawm, zoo dua li tus qauv SUS304. Qhov qis-carbon muaj pes tsawg leeg ntawm SUS310S txwv chromium carbide nag lossis daus nyob rau hauv 450-850 degrees C rhiab heev, yog li nws feem ntau siv nyob rau hauv raws li-welded mob.
Dab tsi yog JIS tus qauv siv rau cov qib no?SUS310S thiab SUS304 phaj, ntawv thiab sawb yog them los ntawm JIS G4304 thiab G4305; tuav thiab ntu yog them los ntawm JIS G4303. Cov qauv ASTM sib xws yog UNS S31008 thiab UNS S30400 hauv qab ASTM A240.
Xa kev nug