304 vs 430 Austenitic vs Ferritic Stainless Steels: Siab -Corrosion Formability vs Tsawg- Nqi Sib Nqus Zog

 

Dab tsi yog lawv cov ntsiab lus tseem ceeb thiab qhov sib txawv ntawm kev ua haujlwm tseem ceeb?

304 muaj 18–20% Cr, 8–10.5% Ni, thiab tsawg dua los yog sib npaug li 0.08% C. Nws tsis yog-sib nqus, muaj zog toughness (txawm nyob rau hauv qhov kub thiab txias), thiab ductility zoo heev.430 nta 16–18% Cr, Tsawg dua los yog sib npaug rau 0.12 nick% C. Nws yog magnetic, muaj zog toughness, thiab yog tsawg dua ductile tshaj 304 tab sis muaj ntau dua thermal conductivity.304 muaj ib tug ntau dua corrosion kuj vim nws cov ntsiab lus nickel thiab austenitic microstructure.

Lawv cov khoom zoo li cas rau qhov kawg - siv cov ntawv thov?

304 yog siv rau siab - kev siv corrosion thiab kev tu cev: cov khoom siv ua zaub mov, khoom siv hauv hiav txwv, cov khoom siv tshuaj lom neeg, thiab cov qauv vaj tsev.430 yog siv rau cov khoom siv hauv tsev qhuav thiab cov hniav zoo nkauj: cov khoom siv backsplashes, tshuab ntxhua khaub ncaws, cutlery, thiab automotive trim qhov twg magnetism tsis muaj kev txhawj xeeb.

Lawv cov kev tiv thaiv corrosion piv li cas hauv - ntiaj teb ib puag ncig?

304 tiv taus atmospheric corrosion, dej tshiab, thiab tshuaj me me zoo. Nws yuav xeb nyob rau hauv siab -chloride ib puag ncig tab sis ua tau zoo nyob rau hauv feem ntau cov chaw sab nraum zoov.430 tiv thaiv xeb hauv cov huab cua qhuav hauv tsev tab sis corrodes sai sai nyob rau hauv cov av ntub, ntug hiav txwv dej, los yog ib puag ncig muaj kuab paug. Nws yuav tsum tau ntxuav thiab tu kom tsis tu ncua kom tsis txhob staining.

Tus nqi thiab kev tsim khoom lag luam yog dab tsi- tawm ntawm ob qib?

430 tus nqi qis dua (30-40% qis) tshaj 304 vim qhov tsis muaj npib tsib xee.304 yog qhov tsim tau zoo heev, ua rau nws zoo tagnrho rau cov duab nyuaj xws li dab dej thiab cov tso tsheb hlau luam; nws welds yooj yim.430 yog tsawg formable thiab tuaj yeem tawg thaum khoov hnyav; nws muaj qhov tsis zoo weldability thiab nws yooj yim rau cov qoob loo loj hlob nyob rau hauv tshav kub- cuam tshuam cheeb tsam.

Cov kev txwv tseem ceeb thiab cov txheej txheem xaiv yog dab tsi?

304 yog nquag rau kev ntxhov siab corrosion cracking (SCC) nyob rau hauv kub chloride ib puag ncig.430 yog nquag embrittlement ntawm qhov kub thiab muaj kev cuam tshuam tsis zoo ntawm qhov kub thiab txias.Prioritize 304 rau corrosion kuj, huv si, thiab complex forming; xaiv 430 rau tus nqi-sensitive, qhuav, sib nqus daim ntawv thov.