304 thiab 316 yog hom stainless hlau, thiab lawv "tiav" yog hais txog qhov zoo nkauj ntawm cov hlau los yog cov duab ntawm cov hlau. Qhov sib txawv ntawm ob hom no feem ntau yog nyob rau hauv lawv cov muaj pes tsawg leeg thiab cov txiaj ntsig tshwm sim:

Kev sib xyaw:

304 Stainless hlau:

Muaj li ntawm 18-20% chromium thiab 8-10.5% npib tsib xee.
Nws kuj tseem yuav muaj me me ntawm lwm cov khoom xws li manganese, silicon, thiab carbon.

316 Stainless hlau:

Muaj li ntawm 16-18% chromium, 10-14% nickel, thiab 2-3% molybdenum.
Qhov sib ntxiv ntawm molybdenum txhim kho nws cov kev tiv thaiv corrosion, tshwj xeeb tshaj yog tiv thaiv chlorides thiab lwm yam kuab tshuaj.

Properties thiab Applications:

304 Stainless hlau:

Corrosion Resistance: Zoo, tab sis tsis siab li 316, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig chloride.

Lub zog: Siab zog thiab toughness, zoo rau cov hom phiaj dav dav.

Daim ntawv thov: Siv dav hauv cov khoom siv hauv chav ua noj, kev ua zaub mov, kev tsim vaj tsev, cov thawv ntim tshuaj, thiab lwm yam vim nws qhov zoo corrosion kuj thiab yooj yim ntawm kev tu.

316 Stainless hlau:

Corrosion Resistance: Superior rau 304, tshwj xeeb tshaj yog nyob rau hauv dej ntsev los yog marine ib puag ncig, thiab nyob rau hauv lub xub ntiag ntawm chlorides.

Lub zog: Zoo ib yam li 304 tab sis nrog zoo pitting kuj.

Daim ntawv thov: Zoo tagnrho rau siv nyob rau hauv marine ib puag ncig, khoom siv tshuaj, kev kho mob implants, chemical processing, thiab txhua qhov chaw uas yuav tsum tau muaj corrosion kuj.

Ua tiav:

Qhov "tiav" ntawm stainless hlau, txawm tias nws yog 304 lossis 316, hais txog qhov ua tiav ntawm qhov chaw, uas tuaj yeem sib txawv nyob ntawm cov txheej txheem tsim khoom. Common finishes muaj xws li:

1. Tsis muaj. 2B: Ib tug du, dull tiav ua los ntawm txias dov ua raws li los ntawm annealing thiab descaling.

2. Nr. 4: Ib qho txhuam txhuam tiav, uas yog ua tiav los ntawm kev txhuam txhuam ntawm qhov chaw los tsim cov qauv ntawm cov kab zoo sib luag rau cov kev taw qhia ntawm txhuam.

3. Nr. 8: Ib daim iav zoo li ua tiav los ntawm polishing nrog kev ua tiav zoo dua abrasives thiab buffing.

Ob leeg 304 thiab 316 stainless hlau tuaj yeem muaj qhov zoo sib xws, tab sis kev xaiv ntawm 304 thiab 316 yuav nyob ntawm qhov tshwj xeeb ib puag ncig thiab cov khoom tsim nyog rau daim ntawv thov.

Puas yog 316 lossis 304 kim dua?

Feem ntau, 316 stainless hlau yog kim dua 304 stainless hlau. Lub ntsiab yog vim li cas rau qhov sib txawv ntawm tus nqi no yog cov muaj pes tsawg leeg ntawm 316 stainless hlau, uas muaj xws li ib tug ntau dua feem pua ​​ntawm cov nickel thiab ntxiv molybdenum. Cov ntsiab lus no txhim khu kev tiv thaiv corrosion ntawm 316 stainless hlau, tshwj xeeb tshaj yog nyob rau hauv chloride thiab marine ib puag ncig, tab sis lawv kuj ua rau cov khoom siv ntau dua.

Nov yog cov ntsiab lus ntawm cov xwm txheej ua rau tus nqi sib txawv:

Khoom siv:

304 Stainless hlau: Muaj li ntawm 18-20% chromium thiab 8-10.5% npib tsib xee.
316 Stainless hlau: Muaj li ntawm 16-18% chromium, 10-14% nickel, thiab 2-3% molybdenum.

Corrosion Resistance:

316 Stainless hlau: Muaj kev tiv thaiv corrosion zoo tshaj, tshwj xeeb tshaj yog tiv thaiv chlorides thiab nyob rau hauv marine ib puag ncig, vim muaj molybdenum.
304 Stainless hlau: Muaj kev tiv thaiv corrosion zoo tab sis tsis zoo nyob rau hauv ib puag ncig corrosive heev piv rau 316.

Tus nqi tsim khoom:

Cov nickel ntau dua thiab qhov sib ntxiv ntawm molybdenum hauv 316 stainless hlau ua rau cov khoom siv raw khoom nce ntxiv.
Kev ua thiab cov nqi tsim khoom kuj tseem yuav siab dua rau 316 stainless hlau vim nws txoj kev sib xyaw ua ke ntau dua.

Yog li ntawd, rau cov ntawv thov uas tsis muaj kev tiv thaiv corrosion zoo tshaj ntawm 316 stainless hlau, 304 stainless hlau feem ntau raug xaiv los ua tus nqi zoo dua.