304 thiab 316 yog ustenitic stainless hlau.

304 stainless hlaumuaj kev tiv thaiv corrosion zoo heev thiab tus nqi -kev ua tau zoo rau kev siv dav dav; 304 Stainless hlau tus nqi yog USD 2.0-4.5 / kg.316 stainless hlaumuaj 2–3% molybdenum (Mo), txhim kho kev tiv thaiv rau chlorides, dej hiav txwv dej, thiab aggressive chemical ib puag ncig. 316 Stainless hlau nqi yog USD 3.0–6.0/kg.

Rau marine, offshore, tshuaj, thiab tshuaj ua daim ntawv thov, 316 feem ntau yog qhov kev xaiv txawm tias nws tus nqi siab dua.

 

304 vs 316 Stainless hlau

Qhov xwm txheej	304 Stainless hlau	316 Stainless hlau
Chromium	18-20%	16-18%
Nickel	8-10.5%	10-14%
Molybdenum	Tsis muaj	2-3%
Corrosion Resistance	Zoo	Zoo heev
Chloride Resistance	Nruab nrab	Superior
Seawater Service	Tsis pom zoo	Pom zoo
Kub Resistance	Zoo heev	Zoo heev
Weldability	Zoo heev	Zoo heev
Nqi	qis	20-40% siab dua
Hom kev lag luam	Khoom noj khoom haus, Architecture	Offshore, Tshuaj, Pharma

 

 

304 vs 316 Stainless hlau Nqe ib kg (2026)

Khoom	304 Stainless hlau	316 Stainless hlau
Phaj / Ntawv	USD 2.5–3.8 / kg	USD 3.5–5.2 / kg
Seamless Yeeb Nkab	USD 3.0–4.5 / kg	USD 4.2–6.0 / kg
Welded yeeb nkab	USD 2.8–4.0 / kg	USD 3.8-5.5 / kg
Round Bar	USD 3.2-4.8 / kg	USD 4.5-6.5 / kg
Flanges & Fittings	USD 4.0–7.0 / kg	USD 5.5–9.0 / kg

Cov nqi yog qhov taw qhia xa tawm- kev lag luam ntau thiab sib txawv nrog qhov ntau, qhov ntev, keeb kwm, thiab cov khoom siv raw.

Hu rau tam sim no

Kev sib piv tshuaj lom neeg

Khoom (%)	304	316
Chromium (Cr)	18-20	16-18
Nickel (Ni)	8-10.5	10-14
Molybdenum (hli)	-	2-3
Carbon (Max)	0.08	0.08
Manganese (Max)	2	2
Silicon (Max)	1	1

 

Vim li cas Molybdenum tseem ceeb?

Qhov sib ntxiv ntawm molybdenum txhim khu lub passive oxide txheej thiab ua kom muaj zog tiv thaiv:

• Pitting corrosion
• Kev txhim kho corrosion
• Chloride nres
• Ib puag ncig sulfuric acid
• Qhov no yog qhov laj thawj tseem ceeb ntawm 316 outperforms 304 nyob rau hauv hnyav industrial puag ncig.

 

Mechanical Properties

Khoom	304	316
Tensile zog	515 MPa ua	515 MPa ua
Yield zog	205 MPa	205 MPa
Elongation	40%	40%
Hardness	Tsawg dua lossis sib npaug rau 201 HB	Tsawg dua lossis sib npaug rau 217 HB
Qhov ntom	8.00 g / cm³	8.00 g / cm³

304 thiab 316 Mechanical kev ua tau zoo yog ze li qub.

 

Corrosion Resistance Analysis

Ob qib 304 316 ua tau zoo nyob rau hauv: Cov cheeb tsam hauv nroog, Cov cua hauv tsev, cov tshuab dej tshiab; Qhov sib txawv me me tau pom nyob rau hauv cov mob me.

Ib puag ncig	304	316
Dej ntshiab	Zoo heev	Zoo heev
Ntug hiav txwv Atmosphere	Ncaj ncees	Zoo heev
Ntsev Txau	Tsis zoo-Fair	Zoo heev
Seawater Splash Zone	pluag	Zoo
Desalination Nroj tsuag	Tsis pom zoo	Pom zoo

 

Pitting Resistance Equivalent Number (PREN)

Alloy	Hom PREN
304	18-20
316	24-26

 

Hom Failure ntawm 304

Hauv cov tshuaj chloride-muaj ib puag ncig, 304 feem ntau tsim:
Cov kab xeb
Tshuaj yej staining
Pitting corrosion
Kev txhim kho corrosion
316 cuam tshuam cov txheej txheem tsis ua haujlwm no.

 

304 thiab 316 Kub Kub

Khoom	304	316
Kev pabcuam txuas ntxiv	Mus txog 870 degree	Mus txog 925 degree
Intermittent Service	Mus txog 925 degree	Mus txog 870 degree
Cryogenic Service	Zoo heev	Zoo heev

Ob qib khaws cov tawv tawv ntawm qhov kub tsis tshua muaj siab thiab tau siv dav hauv LNG systems.

 

Weldability

Ob lub alloys 304 316 pom zoo weldability siv:

• GTAW (TIG)
• GMAW (MIG)
• SMAW
• SAW

 

Pom zoo Filler hlau

• 304: 308 L
• 304L: ER308L
• 316: Hwv 316L
• 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: 316L: ER316L

 

Yuav ua li cas kom tsis txhob vuam tsis ua hauj lwm?

Tsis zoo	Ua rau	Kev tiv thaiv
Kev xav	Tshaj tawm cua sov	Siv 304L / 316L
Distortion	Siab thermal expansion	Balanced vuam ib ntus
Porosity	Qhov chaw paug	Kev tu kom raug
Tsis muaj Fusion	Tsawg cua sov input	Optimize vuam parameters

 

304 vs 316 Stainless Hlau rau Marine Ib puag ncig

Rau ib puag ncig marine, 316 stainless hlau yog qhov zoo dua li 304 stainless hlau . 316 muaj 2-3% molybdenum cov ntsiab lus, uas txhim kho kev tiv thaiv chloride-induced pitting thiab crevice corrosion.

 

304 vs 316 Stainless hlau rau kev ua zaub mov

Ob leeg 304 thiab 316 stainless hlau tau dav siv hauv kev lag luam ua zaub mov. Thiab 304 yog pheej yig. Txawm li cas los xij, 316 stainless hlau yog qhov zoo dua thaum cov khoom siv raug rau cov khoom noj acidic, cov khoom qab ntsev, tshuaj tua kab mob hnyav.

 

304 vs 316 Stainless hlau rau Offshore Platforms

Rau cov kev kho dej tshiab, 304 stainless hlau muaj qhov sib npaug zoo ntawm kev ua tau zoo thiab tus nqi. Rau kev desalination, kev teeb tsa ntawm ntug dej hiav txwv, lossis chloride- cov dej nplua nuj, 316 stainless hlau feem ntau yog cov khoom nyiam.

 

 

304 Stainless Hlau Daim Ntawv Thov

Kev ua zaub mov	Kev tsim vaj tsev	Dej Systems
Lub tank cia	Tes tuav	Cov kav dej kav dej
Cov cuab yeej siv tshuab raj	Lub tsev facades	Cov khoom siv kho dej
Cov khoom noj mis nyuj	Kho kom zoo nkauj panels	-

 

316 Stainless Hlau Daim Ntawv Thov

Offshore Roj & Roj	Seawater Systems	Kev lag luam kws tshuaj
Txheej txheem kav	Cov kav dej txias	Ntxuav - khoom siv hauv chav
Instrument tubing	Desalination nroj tsuag	Bioreactors
Hydraulic systems	Cov khoom siv marine	Sterile ua kab

 

Offshore Platform Instrument Tubing Case

Peb Client offshore platform pib teeb tsa 304 stainless hlau tubing rau kev ntsuas tshuab.

Kev tshwm sim
Tom qab kwv yees li 18 lub hlis:
Deg tshuaj yej staining tsim
Localized pitting tshwm
Yuav tsum tau hloov cov tubing ntau

Kev daws
Yuav lub 316L tubing, Kev pab lub neej tshaj 10 xyoo. Cov nqi kho mob txo qis heev. Corrosion tsis ua haujlwm tau raug tshem tawm zoo

 

Engineering Notes

Ntau tus thawj tswj hwm kev yuav khoom ua ntej rau 304 kom khaws cov peev nyiaj pib qis. Nws yog ib qho zoo heev, tus nqi -txoj kev xaiv zoo rau sab hauv tsev lossis tsis yog - corrosive ib puag ncig. Tab sis yog tias koj daim ntawv thov cuam tshuam nrog huab cua ntawm ntug dej hiav txwv, kev ua tshuaj lom neeg, lossis dej ntsev, qhov "txuag" sai dhau los ua lub luag haujlwm. Qib 316 muaj 2-3% molybdenum, muab qhov tseem ceeb tiv thaiv pitting thiab chloride-induced corrosion uas 304 tsuas yog tsis tuaj yeem sib xws.

 

Xaiv Phau Ntawv Qhia

Xaiv 304 Stainless Hlau yog tias:

• Nyiaj txiag yog ib qho kev txhawj xeeb loj
• Ib puag ncig tsis yog -chloride
• Kev pabcuam sab hauv tsev muaj nyob
• Kev siv dav dav yuav tsum tau siv

 

Xaiv 316 Stainless Hlau yog:

• Marine raug tshwm sim
• Kev pabcuam Offshore yog koom nrog
• Pharmaceutical lossis tshuaj ua haujlwm yuav tsum tau ua
• Ntev - lub sij hawm corrosion kuj tseem ceeb heev

Yog tias koj muaj lus nug, thov koj xav tiv taujtiv tauj pebthaum twg los tau.

 

304 thiab 316 Muaj Cov Khoom Muag

• Seamless Yeeb Nkab
• Welded Yeeb Nkab
• Cov raj
• Daim phiaj
• Cov ntawv
• Coils
• Round Bars
• Hex Bars
• Pav ca Bars
• Forged Flanges
• Lub taub qab- Weld Fittings
• Qhov (socket) Weld Fittings
• Xov Fittings
• Pipe Spools
• Thaum tshav kub kub Exchanger Tubes
• Instrumentation Tubing

 

 

Yam khoom

304 Stainless hlau yeeb nkab
316 Stainless hlau yeeb nkab
304 Stainless Hlau Phaj
316 Stainless Hlau Phaj

 

 

1. Puas yog 316 ib txwm zoo dua 304?

Tsis tas li. Yog tias tsis muaj tshuaj chloride, 304 feem ntau muab tus nqi zoo tshaj -kev ua tau zoo.

 

2. Puas yog 304 xeb?

Yog lawm. Txawm hais tias stainless, 304 tuaj yeem xeb thaum raug cov tshuaj chlorides, cov kab mob sib kis, lossis cov yeeb yaj kiab tsis zoo.

 

3. Vim li cas 316 kim dua?

Qhov ntxiv molybdenum thiab ntau dua nickel cov ntsiab lus ua rau cov nqi raw khoom.

 

4. Puas yog 316 zaub mov- nyab xeeb?

Yog lawm. Ob leeg 304 thiab 316 tau siv dav hauv kev ua zaub mov.

 

5. Qhov twg yog qhov zoo dua rau cov dej hiav txwv?

316 yog qhov zoo dua li 304, txawm hais tias Duplex 2205 feem ntau nyiam rau kev pabcuam dej hiav txwv ntev ntev.

 

6. Kuv puas tuaj yeem vuam 304 txog 316?

Yog lawm. Qhov sib txawv ntawm qhov sib txawv yog siv cov khoom siv hlau zoo xws li ER309L.

 

7. Ntev npaum li cas 316 nyob rau hauv Marine Environments?
Qhov kev pab cuam lub neej txawv nyob ntawm ib puag ncig, kev saib xyuas, thiab kev tsim cov khoom siv. Txawm li cas los xij, 316 stainless hlau feem ntau kav ntev dua 304 stainless hlau hauv chloride - nplua nuj nyob hauv dej hiav txwv.

 

8. Puas yog 316 Tus Nqi Ntxiv?
Hauv ntau daim ntawv thov, yog.
316 stainless hlau feem ntau raug nqi ntau dua 304 stainless hlau vim nws cov ntsiab lus ntau dua nickel thiab molybdenum. Nyob ntawm kev ua lag luam, tus nqi them feem ntau yog nyob nruab nrab ntawm 20% thiab 40%.

 

Hais txog Zhengzhou Huitong Pipeline Equipment Co., LTD.

HT PIPE yog ib tug zoo-paub stockist thiab exporter. Peb yog cov khoom siv stainless / carbon / npib tsib xee alloy khoom xa khoom nrog 15+ kev xa tawm. Peb tsis tsuas yog muab cov kav dej, phaj, puag ncig, tab sis kuj yog cov yeeb nkab fittings, flanges, thiab lwm yam. Tiv tauj peb kom paub ntau ntxiv thiab cov nqi dawb.

 

Author: Chloe Pu

5+ Xyoo ntawm Kev Tshaj Lij Tshaj Plaws hauv Stainless Hlau, Nickel Alloy & Carbon Steel Hlau Kev Lag Luam

Hloov tshiab kawg: Lub Rau Hli 5, 2026 (Beijing Sijhawm)