[플랜트교육] 마르텐사이트계, 페라이트계, 오스테나이트계, 듀플랙스, 석출경화형 스테인리스강 쉬운 차이점 (3분 순삭) Stainless Steel Family Difference

Ferritic stainless steels
Ferritic stainless steels are plain chromium stainless steels with a chromium content varying between 10.5 and 18% and a low carbon content. They are magnetic and not hardenable by heat treatment. Ferritic alloys have good ductility and formability but a relatively poor high temperature strength compared to that of austenitic grades.
Martensitic stainless steels
Martensitic stainless steels were the first stainless steels that were commercially developed (as cutlery) and have a relatively high carbon content (0.1 - 1.2%) compared to other stainless steels. They are plain chromium steels containing between 12 and 18% chromium. They are magnetic and hardenable by quenching and tempering like plain carbon steels and find their main application in cutlery, aerospace and general engineering.
A relatively new group of martensitic stainless steels are the supermartensitic stainless steels. The supermartensitic grades combine high strength and low-temperature toughness with acceptable corrosion resistance in many applications. (please also see the section on supermartensitics in the "More Alloys" Fact File.)
Austenitic stainless steels
Austenitic stainless steels are non-magnetic. When nickel is added to stainless steel in sufficient amounts the crystal structure changes to "austenite". The basic composition of austenitic stainless steels is 18% chromium and 8% nickel. This enhances their corrosion resistance and modifies the structure from ferritic to austenitic. Austenitic grades are the most commonly used stainless steels accounting for more than 70% of production (type 304 is the most commonly specified grade by far). They are not hardenable by heat treatment.
Super austenitic grades have enhanced pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types. This is due the further additions of chromium, molybdenum and nitrogen to these grades.
Duplex stainless steels
These are stainless steels containing relatively high chromium levels (between 18 and 28%) and moderate amounts of nickel (between 4.5 and 8%). The high corrosion resistance and the excellent mechanical properties combination of duplex stainless steels can be explained by their chemical composition and balanced ('duplex') microstructure of approximately equivalent volume fractions of ferrite and austenite.
Super duplex grades have enhanced pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types. This is due the further additions of chromium, molybdenum and nitrogen to these grades.
Precipitation hardening stainless steels
Precipitation hardening stainless steels, like the martensitic types, can be strengthened (i.e. hardened) by heat treatment. The mechanism is metallurgically different to the process in the martensitic types. This means that either martensitic or austenitic precipitation hardening structures can be produced.
Nickel based alloys
Nickel based alloys are a family of alloys in which the principle constituent is nickel although it might be less than 50% of the total composition. Nickel based alloys are used for a wide range of applications requiring aqueous corrosion, high temperature strength of both. Also resistance to mechanical damage by many mechanisms such as fatigue or creep damage is high.
#에듀넷#티클리어#대학온라인강의#에듀윌#ebslang#ebsi#해커스#elihigh#엘리하이#기술사#플랜트엔지니어#플랜트산업협회#KOPIA#한국조선해양플랜트협회#한국플랜트학회#산업통상자원부#한국엔지니어링협회#삼성엔지니어링#삼성물산#대림건설#대우건설#한국가스공사#해외취업#sk에너지#sk화학#한화건설#SK건설#GS건설#현대엔지니어링#현대건설#ARAMCO#TOTAL#BECHTEL#금속재료#배관시공#반도체배관#hookup#훅업#upstream#downstream#onshore#offshore#용접기능사#용접기능장#용접산업기사#용접기사#특수용접#용접기술사#플랜트교육#플랜트강의#해외건설#해외프로젝트#KOCW#수능강의#jobkorea#saramin#건설워커#메가스터디#산업인력공단#구매#발주#시공#검정고시#추천인강#화공플랜트#발전플랜트#해양플랜트#EPC#배관기초교육#배관정복#배관강의#배관강좌#플랜트학과#무료교육#무료강의#온라인교육#국비교육#국비무료#플랜트산업#중동취업#해외취업#국비지원무료교육#억대연봉직업#마이스터고#폴리텍대학교#기계공학과#화학공학과#KAIST#martensitic#ferritic#austenitic#duplex#precipitation hardening#stainless steel#family#families#chemical composition#magnetic#properties#work hardening#corrosion registance#ductility#high temperature#low temperature#cryogenic#resistance#bct#bcc#fcc#면심입방구조#체심입방구조#자성#마르텐사이트#페라이트#오스테나이트#듀플랙스#석출경화형#자성#연성#가공경화

[@LIMKYUNGSANG]

정말 좋은 영상입니다. 수고가 많습니다.

[@plant_kim_CM]

좋은 댓글 고맙습니다.
주변 지인분들과 함께 보시면 더욱 좋습니다.
감사합니다.

[@160praxis8]

좋은 강의 감사드립니다

[@plant_kim_CM]

좋은 댓글 고맙습니다.
채널공유로 좀 더 많은 사람들이 볼 수 있다면 더욱 좋겠습니다.
감사합니다.

[@MrPupkudos]

이제부터 구독하고 자주 열공 하겠습니다. 감사합니다.🥰

[@plant_kim_CM]

좋은 댓글 고맙습니다.
주변분들과의 영상 공유로 뜻깊은 영상이 될 수 있다면 더욱 좋겠습니다.
감사합니다.

[@민민형제의하루]

좋은정보 감사합니다 영상전부 다 보고있습니다^^

[@plant_kim_CM]

좋은 댓글 고맙습니다.
주변분들과의 영상 공유로 뜻깊은 영상이 될 수 있다면 더욱 좋겠습니다.
감사합니다.

[@lsu3080]

좋은 정보 감사합니다.

[@plant_kim_CM]

좋은 댓글 고맙습니다.
주변 지인분들과 함께하면 더욱 좋습니다. 감사합니다.

[@코난-l1v]

감사~~

[@plant_kim_CM]

좋은 댓글 고맙습니다.
주변 지인분들과 함께하면 더욱 좋습니다. 감사합니다.

[@dndodhdj1582]

최고임

[@plant_kim_CM]

좋은 댓글 고맙습니다.
채널공유로 좀 더 많은 사람들이 볼 수 있다면 더욱 좋겠습니다.
감사합니다.