Qhov sib txawv ntawm UNS S31803 thiab SS316
Hom khoom
- UNS S31803 yog duplex stainless hlau raws li 22% chromium cov ntsiab lus.
- SS316 yog austenitic stainless hlau raws li 18% chromium cov ntsiab lus.
Physical thiab Mechanical Properties
- Vim lawv cov tshuaj sib txawv thiab microstructures, lawv muaj qhov sib txawv ntawm lub cev thiab tensile zog.
- S31803 muaj kev tiv thaiv corrosion zoo dua thiab muaj zog dua, thaum SS316 tuaj yeem raug xaiv rau lwm yam laj thawj.
Microstructure
- Duplex stainless hlau yog hu ua "duplex" vim hais tias lawv muaj qhov sib npaug ntawm austenitic thiab ferrite nplej, uas txhais tau hais tias duplex stainless hlau ua ke lub cev thiab txhua yam khoom ntawm ob qho tib si.
Corrosion kuj thiab nqi-zoo
- Austenitic stainless hlau feem ntau muaj kev tiv thaiv corrosion zoo heev, cov khoom siv kho tshuab zoo tshaj qhov kub ntawm kev khiav hauj lwm ntau, suav nrog qhov kub tsis tshua muaj zog, thiab tsis muaj hlau nplaum.
- Ferritic stainless hlau feem ntau tsis tshua muaj kev tiv thaiv corrosion thiab tsis tshua muaj nqi, tab sis tiv taus kev ntxhov siab corrosion.
- Duplex stainless steels muab cov cwj pwm no kom ua tiav lub zog siab thiab zoo heev corrosion kuj, nyob twj ywm tus nqi zoo, thiab kuj tiv thaiv kev ntxhov siab corrosion tawg.
Lub zog thiab corrosion kuj
- UNS S31803 muaj kwv yees li ob zaug lub zog tawm los piv rau SS316.
- Tus Pitting Equivalent Number (PREN) ntawm UNS S31803 yog ze rau 34 piv rau 25 rau SS316, implying ib tug kuj tsis tshua muaj kuj rau pitting corrosion.
Tus nqi thiab kev txwv kev thov
- SS316 feem ntau tsis tshua muaj nqi tshaj UNS S31803, yog li nws yuav raug xaiv los siv raws li qhov project tus nqi, txawm hais tias tus nqi sib txawv yuav txo qis los yog ploj thaum cov nqi npib tsib xee siab dua.
- UNS S31803 tej zaum yuav raug txwv nyob rau hauv qis-kub (qis dua -50 degree) los yog high-temperature (siab dua 250 degree), yog li SS316 tej zaum yuav nyiam.
