304 Stainless hlau

304 stainless hlau yog qib stainless hlau ua raws li American ASTM tus qauv. Ntawm tag nrho cov ntaub ntawv stainless hlau, 304 stainless hlau yog yuav luag txhua qib. Qhov ceev ntawm 304 stainless hlau yog 7.93 g / cm³. Lub npe kev tshaj lij ntawm 304 stainless hlau tseem hu ua 18/8 stainless hlau, vim tias nws muaj ntau dua 18% chromium thiab ntau dua 8% npib tsib xee. 304 stainless hlau yog resistant rau kub (txog 800 ℃), thiab muaj cov yam ntxwv ntawm kev ua tau zoo thiab siab toughness. Nws yog dav siv nyob rau hauv kev lag luam, rooj tog kho kom zoo nkauj kev lag luam thiab khoom noj khoom haus thiab kev kho mob kev lag luam. Hauv ASTM A351 tus qauv, CF8 yog qhov sib npaug ntawm 304 stainless hlau.

 

Suav lub npe	304 不锈钢/06Cr19Ni10 (GB/T 3280-2015)	Lub ntsiab Alloy Elements	Ni, Mo
Lub npe Askiv	AISI 304 Stainless hlau, AISI 304 SS	Magnetic Performance	Tsis muaj zog hlau nplaum, tom qab ua haujlwm txias xws li ncab lossis stamping, cov hlau nplaum yuav muaj zog dua (tuaj yeem nyiam los ntawm cov hlau nplaum)
Lwm Lub Npe	SUS 304 SS (JIS G4303) lossis 18-8 SS	Yam ntxwv	Corrosion kuj (tsis muaj kev tiv thaiv tag nrho rau corrosion), kub tsis kam, zoo toughness
Metallographic Structure	Austenite

 

Nws yuav tsum tau muab sau tseg tias zaub mov-qib 304 stainless hlau muaj cov ntsiab lus nruj dua li qub 304 stainless hlau. Piv txwv li: lub ntsiab lus thoob ntiaj teb ntawm 304 stainless hlau yog qhov tseem ceeb 18% -20% ntawm chromium thiab 8% -10% ntawm npib tsib xee, tab sis cov zaub mov qib 304 stainless hlau yog 18% ntawm chromium thiab 8% nickel, uas tau tso cai rau fluctuate nyob rau hauv ib tug tej yam ntau yam, thiab txwv cov ntsiab lus ntawm ntau yam hnyav hlau. Hauv lwm lo lus, 304 stainless hlau tsis yog khoom noj khoom haus qib 304 stainless hlau

Cov txheej txheem sau npe ntau hauv kev lag luam suav nrog 06Cr19Ni10 thiab SUS 304, ntawm 06Cr19Ni10 feem ntau txhais tau tias lub teb chaws tus qauv tsim (GB / T 3280-2015), AISI 304 feem ntau txhais tau tias ASTM tus qauv tsim, thiab SUS 304 txhais tau tias Japanese qauv tsim.

304 yog lub hom phiaj dav dav hlau stainless uas tau siv dav los ua cov khoom siv thiab cov khoom siv uas yuav tsum muaj kev sib xyaw ua ke zoo (corrosion resistance and formability). Yuav kom tswj tau nws qhov kev tiv thaiv corrosion, nws yuav tsum muaj ntau dua 18% chromium thiab ntau dua 8% npib tsib xee.

Lub koom haum American Iron thiab Steel siv peb tus lej los xaiv ntau yam qauv ntawm cov hlau tsis muaj steel hlau. hauv:
1. Austenitic stainless hlau yog tsim los ntawm cov lej hauv 200 thiab 300 series. Piv txwv li, qee qhov ntau hom austenitic stainless hlau raug xaiv los ntawm 201, 304, 316 thiab 310.
2. Ferritic thiab martensitic stainless hlau yog sawv cev los ntawm 400 series tooj.
3. Ferritic stainless hlau yog sawv cev los ntawm 430 thiab 446. Martensitic stainless hlau yog sawv cev los ntawm 410, 420 thiab 440C. ,
4. Duplex (austenitic-ferritic) stainless hlau, nag lossis daus hardening stainless hlau, thiab siab alloys nrog tsawg dua 50% hlau feem ntau yog tsim los ntawm cov tswv lossis cov npe lag luam.

Rau 304 stainless hlau, Ni lub hauv paus hauv nws cov ntsiab lus tseem ceeb heev, uas ncaj qha txiav txim siab corrosion ntawm 304 stainless hlau thiab nws cov nqi. Cov ntsiab lus tseem ceeb tshaj plaws hauv 304 yog Ni thiab Cr, tab sis lawv tsis txwv rau ob lub ntsiab lus no. Cov kev cai tshwj xeeb raug teev los ntawm cov qauv khoom. Qhov kev txiav txim siab hauv kev lag luam yog tias ntev npaum li cov ntsiab lus Ni ntau dua 8% thiab cov ntsiab lus Cr ntau dua 18%, nws tuaj yeem suav tias yog 304 stainless hlau. Qhov no yog vim li cas kev lag luam hu ua hom stainless hlau 18/8 stainless hlau. Qhov tseeb, cov qauv khoom lag luam muaj cov kev cai meej meej rau 304, thiab cov qauv khoom no muaj qee qhov sib txawv rau cov duab sib txawv ntawm cov hlau tsis muaj steel. Hauv qab no yog qee cov qauv khoom siv thiab kev sim. Txhawm rau txiav txim siab seb cov khoom puas yog 304 stainless hlau, nws yuav tsum ua kom tau raws li qhov yuav tsum tau muaj ntawm txhua lub hauv paus hauv cov qauv khoom. Tsuav yog ib qho tsis tau raws li qhov yuav tsum tau ua, nws tsis tuaj yeem hu ua 304 stainless hlau.

 

Chemical Compositions ntawm 304 Stainless Hlau Raws li ASTM A276
SIB 304	C	Mn	P	S	Si	Cr	Ni
%	≤ 0.08	≤ 2.00	≤ 0.045	≤ 0.030	≤ 1.00	18.0-20.0 Nws	8.0-11.0 Nws
Chemical Compositions ntawm 304 Stainless Hlau Raws li ASTM A240
SIB 304	C	Mn	P	S	Si	Cr	Ni
%	≤ 0.07	≤ 2.00	≤ 0.045	≤ 0.030	≤ 0.75	17.5–19.5 Nws	8.0-10.5 Nws
Chemical Compositions ntawm 304 Stainless Hlau Raws li JIS G4303
SUS 304 SS	C	Mn	P	S	Si	Cr	Ni
%	≤ 0.08	≤ 2.00	≤ 0.045	≤ 0.030	≤ 1.00	18.0-20.0 Nws	8.0-10.5 Nws

 

Kev siv ntawm 304 Stainless Hlau

304 stainless hlau yog feem ntau siv chromium-nickel stainless hlau. Raws li ib tug dav siv hlau, nws muaj zoo corrosion kuj, tshav kub tsis kam, tsis kub kub lub zog thiab txhua yam khoom; Kev ua haujlwm kub zoo xws li stamping thiab dabtsi yog khoov, tsis muaj kev kho cua sov Hardening tshwm sim (siv kub -196 ℃ ~ 800 ℃). Corrosion tsis kam nyob rau hauv cov huab cua, yog tias nws yog ib qho chaw ua lag luam lossis thaj chaw muaj kuab heev, nws yuav tsum tau muab ntxuav kom huv si kom tsis txhob muaj corrosion. Haum rau kev ua zaub mov, khaws cia thiab kev thauj mus los. Nws muaj kev ua tau zoo thiab weldability. Phaj cua sov exchangers, bellows, khoom siv hauv tsev (Class 1 thiab 2 tableware, txee, cov kav dej hauv tsev, lub tshuab rhaub dej, boilers, da dej), qhov chaw pib (windshield wipers, mufflers, molded products), khoom siv kho mob, khoom siv hauv tsev, tshuaj, khoom noj khoom haus kev lag luam , kev ua liaj ua teb, nkoj qhov chaw, thiab lwm yam. Lub 304 stainless hlau uas nws cov ntsiab lus nruj tswj tau kuj tseem hu ua zaub mov qib 304 stainless hlau. hlau.

Feem ntau ntawm kev siv yuav tsum tau ua kom zoo li qub ntawm lub tsev rau lub sijhawm ntev. Thaum txiav txim siab txog hom stainless hlau xaiv, cov kev txiav txim siab tseem ceeb yog cov qauv tsim kom zoo nkauj, corrosiveness ntawm cov huab cua hauv zos, thiab cov txheej txheem tu yuav tsum tau siv. Txawm li cas los xij, lwm cov ntawv thov nce ntxiv nrhiav kev ncaj ncees los yog dej impermeability. Piv txwv li, lub ru tsev thiab sab phab ntsa ntawm cov tsev lag luam. Hauv cov ntawv thov no, tus tswv tus nqi tsim kho yuav tseem ceeb dua li kev zoo nkauj, thiab qhov chaw tsis huv heev. 304 stainless hlau ua haujlwm zoo hauv qhov chaw qhuav hauv tsev. Txawm li cas los xij, txhawm rau tswj nws qhov zoo li sab nraum zoov hauv thaj chaw nyob deb nroog thiab nroog, yuav tsum tau ntxuav tas li. Hauv cov cheeb tsam uas muaj kuab paug hnyav heev thiab cov ntug dej hiav txwv, qhov chaw tuaj yeem ua qias neeg heev thiab txawm xeb.

Txawm li cas los xij, txhawm rau ua kom zoo nkauj hauv ib puag ncig sab nraum zoov, yuav tsum muaj cov nickel-muaj stainless hlau. Yog li ntawd, 304 stainless hlau yog dav siv nyob rau hauv cov ntaub thaiv phab ntsa, sab phab ntsa, ru tsev thiab lwm yam kev tsim kho lub hom phiaj, tab sis nyob rau hauv loj heev corrosive industrial los yog marine atmospheres, 316 stainless hlau yog nyiam. Stainless hlau zawv zawg qhov rooj, cov neeg tau txais kev paub txog qhov zoo ntawm kev siv stainless hlau hauv cov qauv siv. 304 thiab 316 stainless hlau muaj nyob rau hauv ntau cov txheej txheem tsim. Vim hais tias "duplex" stainless hlau 2205 ua ke zoo atmospheric corrosion kuj nrog siab tensile thiab elastic zog, cov hlau no kuj muaj nyob rau hauv European cov lus qhia. Khoom Shapes Stainless hlau yog tiag tiag tsim nyob rau hauv ib tug tag nrho cov ntau yam ntawm cov qauv hlau duab thiab ntau thiab tsawg, thiab muaj ntau yam tshwj xeeb duab kuj muaj. Cov khoom siv feem ntau yog tsim los ntawm cov ntawv thiab sawb, tab sis kuj tseem muaj cov khoom tshwj xeeb yog tsim los ntawm cov phaj nruab nrab thiab hnyav, piv txwv li, hauv kev tsim cov hlau kub-kuav los tiag steel thiab extruded structural steel. Kuj tseem muaj cov kav dej puag ncig, oval, square, rectangular thiab hexagonal welded los yog seamless kav thiab lwm yam ntaub ntawv, nrog rau cov profiles, tuav, xov hlau thiab castings.

 

Lub cev muaj zog ntawm 304 Stainless Hlau		Cov cuab yeej ua haujlwm ntawm 304 Stainless Hlau
Qhov ceev (20 ℃, g / cm³)	7.93 ib	Tensile zog σb (MPa)	≥515-1035
Melting kub (℃)	1398-1454 Ib	Yield zog σ0.2 (MPa)	≥205
Lub peev xwm kub tshwj xeeb (0 ~ 100 ℃, KJ·kg-1K-1)	0.5	Elongation δ5 (%)	≥40
Thermal conductivity (W·m-1·K-1)	(100 ℃) 16.3, (500 ℃) 21.5	tus nqi txo hauv cheeb tsam ψ (%)	40-60
Coefficient ntawm Linear Expansion (10-6·K-1)	(0-100 ℃) 17.2, (0-500 ℃) 18.4	Hardness	≤201HBW; ≤92HRB; ≤210HV
Kev tiv thaiv (20 ℃, 10-6Ω·m2 / m)	0.73 ib
Ntev Elastic Modulus (20 ℃, KN / mm2)	193

 

Yog vim li cas rau xeb ntawm 304 stainless hlau

Qhov tshwm sim xeb ntawm 304 stainless hlau cov khoom yuav muaj cov laj thawj hauv qab no:

1. Cov tshuaj chloride
Chloride ions muaj nyob dav, xws li ntsev / hws / dej hiav txwv / hiav txwv cua / av thiab lwm yam. Nyob rau hauv lub xub ntiag ntawm chloride ions, stainless hlau corrodes sai heev, txawm ntau tshaj li cov uas tsis muaj carbon steel. Yog li ntawd, muaj cov kev xav tau rau kev siv ib puag ncig ntawm stainless hlau, thiab nws yuav tsum tau so ntau zaus kom tshem tawm cov plua plav thiab ua kom nws huv si thiab qhuav. Muaj ib qho piv txwv hauv Tebchaws Meskas: ib lub tuam txhab siv lub thawv ntoo qhib los tuav cov tshuaj uas muaj chloride ions. Lub thawv tau siv ze li ib puas xyoo. Nws tau npaj yuav hloov hauv xyoo 1990. Vim tias cov khoom siv ntoo qhib tsis niaj hnub txaus, lub thawv stainless hlau tau siv rau 16 hnub tom qab hloov. Los tiv thaiv corrosion.

2. Kev kho mob
Cov ntsiab lus alloy tsis yaj rau hauv matrix, ua rau cov ntsiab lus tsis tshua muaj hlau nyob hauv cov qauv matrix thiab tsis zoo corrosion kuj.

3. Intergranular corrosion
Qhov no titanium- thiab niobium-dawb cov ntaub ntawv yog nquag mus rau intergranular corrosion. Qhov sib ntxiv ntawm titanium thiab niobium, ua ke nrog kev kho kom ruaj khov, tuaj yeem txo cov kev cuam tshuam ntawm intergranular. Lub siab-alloy steel uas tuaj yeem tiv taus corrosion hauv huab cua lossis hauv cov tshuaj corrosive media. Stainless hlau muaj qhov zoo nkauj nto thiab zoo corrosion kuj. Nws tsis tas yuav tsum tau kho qhov chaw xws li xim plating, tab sis es tsis txhob siv cov khoom hauv qhov chaw ntawm stainless hlau. Nws yog siv ntau hom hlau, feem ntau hu ua stainless hlau. Cov neeg sawv cev ua tau zoo yog cov hlau alloy siab xws li 13 chrome steel thiab 18-8 chrome nickel steel. Los ntawm metallographic taw tes ntawm view, vim hais tias cov hlau tsis muaj chromium, ib tug nyias chromium zaj duab xis yog tsim nyob rau saum npoo, uas cais cov pa oxygen los ntawm cov hlau thiab plays lub luag hauj lwm nyob rau hauv corrosion kuj. Yuav kom tswj tau qhov kev tiv thaiv corrosion ntawm cov hlau tsis huv, cov hlau yuav tsum muaj ntau tshaj 12% chromium. Rau lub sijhawm uas yuav tsum tau vuam. Cov ntsiab lus qis dua txo qis carbide nag lossis daus nyob rau hauv thaj chaw tshav kub uas cuam tshuam ze ntawm qhov vuam, uas tuaj yeem ua rau muaj kev cuam tshuam ntawm intergranular corrosion (weld erosion) ntawm stainless hlau hauv qee qhov chaw.