Qhov sib txawv ntawm 430 VS 304 STAINLESS STEEL?

 

Stainless hlau los ntawm ntau qib sib txawv. Txhua qib coj nws tus kheej cov tshuaj muaj pes tsawg leeg, lub zog tensile, thiab lwm yam ntxwv. Cia peb saib ob ntawm cov qib nrov tshaj plaws ntawm stainless hlau - 430 thiab 304.

Stainless hlau yog dab tsi?

Zoo li lwm yam hlau, stainless hlau yog ib qho alloy ntawm hlau thiab carbon. Qhov txawv ntawm stainless hlau yog qhov sib ntxiv ntawm chromium. Txhawm rau txiav txim siab stainless hlau, cov hlau yuav tsum muaj tsawg kawg yog 10% chromium los ntawm qhov hnyav. Cov chromium muab stainless hlau nws cov yam ntxwv tsis-corrosive, uas pab lengthen cov hlau lub neej.

Cov qib sib txawv ntawm steel txhais li cas?

Kev lag luam steel faib cov hlau los ntawm cov qib txhawm rau txhawm rau ua kom muaj qhov sib xws thiab zoo uas cov txheej txheem steel xav tau. Qib steel yog txiav txim siab los ntawm txhua yam uas ua rau cov hlau tshwj xeeb.

Cov koom haum steel qauv txiav txim siab yuav ua li cas cais txhua qib ntawm cov hlau. Vim tias muaj ntau lub koom haum tsim qauv thoob ntiaj teb, tib qib ntawm cov hlau yuav raug cais tawm txawv ntawm cov ciam teb hauv tebchaws. Qib 304 thiab 430 yog American Iron and Steel Institute (AISI) cov qauv.

Dab tsi yog 430 stainless hlau?

Hom 430 stainless hlau yog cov hlau me me, corrosion-resistant hlau uas tuaj yeem yooj yim khoov, ncab, lossis kos.

Nws nta cov tshuaj muaj pes tsawg leeg hauv qab no:

Hlau=Sib npaug

Cov pa roj carbon < 0.12%

Chromium=16-18%

Nickel < 0.75%

Manganese < 1 0%

Silicon <1.{1}}%

Phosphorus < 0.040%

Sulfur < 0.30%

Nws cov ntsiab lus ntawm cov pa roj carbon ntau thiab tsis muaj cov khoom ruaj khov ua rau qib no nyuaj rau vuam.

Hom 430 stainless hlau muaj qhov tsawg kawg nkaus lub zog ntawm 30 ksi thiab lub zog tensile yam tsawg kawg nkaus ntawm 65 ksi. Feem ntau, hom 430 stainless hlau yog siv rau hauv cov ntawv thov kom zoo nkauj uas xav tau kev zoo nkauj dua li lub zog. Nws muaj nyob rau hauv 430 stainless hlau ntawv.

Dab tsi yog 304 stainless hlau?

Hom 304 stainless hlau yog qhov siv dav tshaj plaws ntawm txhua qib stainless hlau. Nws feem ntau tshwm sim hauv cov khoom siv hauv chav ua noj thiab cov ntawv thov kev lag luam.

Qib no ntawm stainless hlau nta cov tshuaj muaj pes tsawg leeg hauv qab no:

Hlau=Sib npaug

Cov pa roj carbon {{0}} 0 - 0.07%

Chromium=17.50 - 19.50%

Manganese {{0}} 0 - 2.0%

Silicon {{0}} 0 - 1.0%

Phosphorous {{0}} 0 - 0.05%

Sulfur {{0}} 0 - 0.03%

Nickel {{0}}.0 - 10.5%

Nitrogen {{0}} 0 - 0.11%

 

Hom 304 tuaj yeem welded rau cov pa roj carbon steel siv TIG lossis MIG vuam. Qib no ntawm stainless hlau muaj qhov tsawg kawg nkaus lub zog ntawm 30 ksi thiab lub zog tensile yam tsawg kawg nkaus ntawm 75 ksi.

Cov qib stainless hlau no niaj hnub khaws cia hauv ntau hom, suav nrog: 304 stainless hlau ntawv, 304 stainless hlau phaj, 304 stainless hlau raj, thiab 304 stainless hlau bar.

Dab tsi yog 304 stainless hlau ntawv?

304 stainless hlau daim ntawv yog ib qib siv feem ntau ntawm stainless hlau uas belongs rau tsev neeg austenitic stainless hlau. Nws tseem hu ua 18/8 stainless hlau vim nws muaj kwv yees li 18% chromium thiab 8% npib tsib xee los ntawm qhov hnyav. Lub alloy muaj pes tsawg leeg ntawm 304 stainless hlau muab zoo heev corrosion kuj, siab durability, thiab zoo formability.

Nov yog qee qhov tseem ceeb thiab cov khoom ntawm 304 stainless hlau ntawv:

• Corrosion resistance: 304 stainless hlau nthuav tawm zoo heev tiv thaiv corrosion nyob rau hauv ntau qhov chaw, nrog rau atmospheric tej yam kev mob thiab me me tshuaj ib puag ncig. Nws yog tshwj xeeb tshaj yog tiv taus oxidation thiab corrosion los ntawm feem ntau cov organic thiab inorganic acids.
• Lub zog thiab kav ntev: Txawm tias tsis muaj zog npaum li qee cov qib stainless hlau zoo li 316, 304 stainless hlau tseem muaj zog tensile zoo thiab kav ntev. Nws tuav nws lub zog thiab kev ncaj ncees txawm tias qhov kub siab.

Formability thiab weldability: 304 stainless hlau yog heev formable, cia nws yooj yim fabricated rau hauv ntau yam duab thiab qauv. Nws tuaj yeem ua haujlwm txias, khoov, lossis dov yam tsis muaj kev cuam tshuam rau nws cov khoom siv kho tshuab. Nws kuj yog yooj yim weldable siv cov txheej txheem vuam.

 

Kev nyab xeeb thiab zaub mov-qib haum: Vim nws cov corrosion kuj thiab yooj yim tu cov khoom, 304 stainless hlau yog dav siv nyob rau hauv cov ntaub ntawv uas kev huv thiab huv yog ib qho tseem ceeb, xws li hauv cov khoom noj khoom haus, khoom siv hauv chav ua noj, thiab cov khoom siv kho mob.

Cov tsos mob thiab ua tiav: 304 stainless hlau muaj qhov ci ntsa iab, ua kom pom tseeb, feem ntau hu ua "brushed" lossis "mill" tiav. Nws muab qhov zoo nkauj zoo nkauj thiab tuaj yeem ua polished lossis coated rau cov ntawv tshwj xeeb.

 

304 stainless hlau ntawv pom muaj ntau daim ntawv thov hauv ntau qhov kev lag luam, suav nrog:

• Kev tsim kho: ru tsev, cladding, architectural trim, thiab cov ntaub ntawv kho kom zoo nkauj.
• Chav ua noj thiab cov khoom siv: dab dej, countertops, tais diav, thiab khoom siv.
• Kev ua zaub mov: Cov khoom siv, lub tank cia, thiab cov kav dej.
• Automotive: Trim, tso cua tshuab, thiab cov khoom.
• Chemical processing: Tanks, li qub, thiab fittings.
• Kev kho mob thiab kws kho mob: cov cuab yeej phais, kev cog hniav, thiab cov cuab yeej kuaj.

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias 304 stainless hlau tsis haum rau cov ntawv thov uas cuam tshuam rau qhov chaw muaj corrosive heev lossis kub kub, qhov twg qib siab stainless hlau zoo li 316 lossis 321 yuav tsim nyog dua.

Puas yog 340 thiab 430 stainless hlau ferritic, austenitic, lossis martensitic?

Stainless hlau tuaj yeem muab faib ua peb pawg - austenitic, ferritic, thiab martensitic.

Austenitic steel yog feem ntau siv. Nws muaj cov ntsiab lus chromium siab heev, ua rau nws tshwj xeeb tshaj yog corrosion-resistant thiab tsis-magnetic (txawm tias nws yuav dhau los ua hlau nplaum tom qab ua haujlwm txias).

Ferritic hlau yog qhov thib ob feem ntau qeb. Cov hlau no tsis tshua kim dua li cov hlau austenitic vim lawv cov ntsiab lus qis nickel. Lawv yog cov hlau nplaum thiab tuaj yeem hardened los ntawm kev ua haujlwm txias.

Martensitic stainless hlau yog qhov tsawg tshaj plaws ntawm cov hlau stainless. Txawm hais tias nws yog qhov nyuaj tshaj plaws thiab ruaj khov tshaj plaws ntawm cov hlau tsis muaj steel, martensitic hlau yog qhov tsawg tshaj plaws corrosion-resistant. Martensitic stainless hlau tau nce ntxiv hauv kev lag luam tsheb.

Hom 430 stainless hlau yog ferritic thaum hom 340 stainless hlau yog austenitic.