SUS316 vs SUS304: Qhov txawv ntawm qhov tseem ceeb hauv kev sib xyaw, cov khoom siv thiab kev siv
Dec 03, 2025
Tso lus
SUS316 thiab SUS304: Ob Tus Neeg Ua Haujlwm ntawm Tsev Neeg Austenitic
SUS304 thiab SUS316 yog ob qho tib si austenitic stainless hlau nrog lub ntsej muag -centered cubic qauv uas ua rau lawv tsis yog -magnetic nyob rau hauv annealed mob thiab formable nyob rau hauv ib tug dav kub ntau yam. Qhov tseem ceeb sib txawv ntawm ob yog chemistry: SUS316 yog qhov tseem ceeb SUS304 nrog rau kev txiav txim siab molybdenum ntxiv ntawm 2.00-3.00%. Qhov kev hloov pauv no hloov pauv cov hlau los ntawm qhov dav dav - hom phiaj qib mus rau qib siab dua - corrosion- qib tsis kam rau cov kev pabcuam chloride.
SUS304 Stainless hlau yog dab tsi?
SUS304 yog Japanese npe ntawm 18-8 austenitic stainless hlau, muaj kwv yees li 18% chromium thiab 8% npib tsib xee. Nws muaj zoo heev corrosion kuj, zoo mechanical zog thiab zoo formability thiab weldability, ntawm tus nqi qis. Hauv Suav GB system nws sib raug rau 06Cr19Ni10. SUS304 yog qhov kev xaiv ua ntej rau cov khoom siv hauv chav ua noj, cov khoom siv ua zaub mov, lub tsev sab hauv thiab suav tsis tau cov khoom siv hluav taws xob, tab sis nws tsis tiv taus cov tshuaj chloride pitting, crevice corrosion lossis kev ntxhov siab corrosion tawg.
SUS316 Stainless hlau yog dab tsi?
SUS316 yog austenitic stainless hlau alloyed nrog molybdenum rau txhim kho corrosion kuj. Cov ntsiab lus molybdenum ntawm 2.00-3.00% txhim khu kev tiv thaiv pitting thiab crevice corrosion nyob rau hauv chloride media xws li seawater thiab de-icing ntsev, thiab txhim kho lub zog ntawm qhov kub thiab txias. Hauv Suav GB system nws sib raug rau 06Cr17Ni12Mo2. Cov ntawv thov muaj xws li cov khoom siv tshuaj, khoom siv hauv hiav txwv, cov khoom siv kho mob, cov khoom siv tshuaj thiab cov khoom siv hluav taws xob.
Tshuaj muaj pes tsawg leeg (JIS G4304 / G4305)
| Cov ntsiab lus,% | SUS 304 | SUS 316 |
|---|---|---|
| Cov pa roj carbon C | 0.08 max | 0.08 max |
| Silicon Si | max 1.00 Nws | max 1.00 Nws |
| Manganese Mn | max 2.00 Nws | max 2.00 Nws |
| Phosphorus P | 0.045 max | 0.045 max |
| Sulfur S | 0.030 max | 0.030 max |
| Nickel Nim | 8.00-10.50 | 10.00-14.00 |
| Chromium Cr | 18.00-20.00 | 16.00-18.00 |
| Molybdenum Cov | - | 2.00-3.00 |
Nco ntsoov tias SUS316 nqa ntau dua nickel ntau dua thiab qis dua chromium ntau dua SUS304, nrog rau qhov sib npaug hloov kho los ntawm molybdenum ntxiv.
Mechanical Properties (JIS G4304, Phaj)
| Khoom | SUS 304 | SUS 316 |
|---|---|---|
| 0.2% pov thawj kev ntxhov siab, MPa | 205 feeb | 205 feeb |
| Tensile zog, MPa | 520 min | 520 min |
| Elongation,% | 40 feeb | 40 feeb |
| Hardness | 187 HB / 90 HRB / 200 HV max | 187 HB / 90 HRB / 200 HV max |
Lub cev muaj zog
| Khoom | SUS 304 | SUS 316 |
|---|---|---|
| Qhov ceev, g / cm3 | 7.93 | 7.98 |
| Modulus ntawm elasticity, GPa | 193 | 193 |
| Thermal conductivity ntawm 100 C, W / mK | 16.3 | 16.3 |
| Kev kub siab ntau yam, degrees C | 1400-1450 Nws | ib 1371-1399 |
SUS316 muaj qhov sib txawv me ntsis qis dua SUS304 vim nws cov ntsiab lus alloy siab dua. Qhov no tsis tshua muaj kev xav txog kev tsim qauv hauv kev pabcuam ib txwm muaj, vim tsis muaj qib siv nyob ze nws qhov chaw melting.
Corrosion Resistance thiab Nqi
Lub molybdenum nyob rau hauv SUS316 muab nws kom meej meej zoo tiv thaiv pitting thiab crevice corrosion nyob rau hauv chloride ib puag ncig. Hauv cov ntsiab lus siv tau, SUS316 yog qhov nyiam rau kev tsim kho ntug hiav txwv, cov khoom siv hauv hiav txwv, cov khoom siv tshuaj lom neeg thiab txhua daim ntawv thov raug rau ntsev lossis tshuaj chlorine- raws li cov tshuaj ntxuav. Vim tias npib tsib xee thiab molybdenum yog cov khoom siv kim heev, SUS316 feem ntau raug nqi ntau dua SUS304, thiab nws cov ntsiab lus ntau dua nickel ua rau nws tus nqi ntau dua rau cov khoom lag luam raw khoom txav.
Kev sib piv ntawm daim ntawv thov
SUS304: chav ua noj, kev ua zaub mov, kab dej haus, tsev facades, railings, khoom siv hauv tsev, cov tank tso rau hauv cov khoom tsis yog -chloride kev pabcuam.
SUS316: Cov khoom siv tshuaj lom neeg thiab tshuaj, khoom siv hauv hiav txwv thiab sab nrauv, cov khoom siv hluav taws xob, cov khoom siv kho mob, cov kav dej hiav txwv, brewery thiab cov khoom siv mis nyuj ntxuav nrog chlorine.
Sib piv nrog lwm cov qib JIS
SUS430 yog qib ferritic uas yog sib nqus thiab muaj kev tiv thaiv corrosion tsawg dua SUS304 thiab SUS316, tab sis nws yog pheej yig thiab dav siv rau hauv chav ua noj dab dej thiab cov khoom vaj huam sib luag. SUS303 yog ib qho dawb-machining version ntawm SUS304 nrog ntxiv sulfur; nws tshuab tau yooj yim tab sis muaj qis corrosion kuj thiab formability. SUS310S yog ib lub siab -nickel, siab -chromium tshav kub- qib resistant nrog zoo siab - kub oxidation tsis kam tshaj SUS316, ntawm tus nqi siab dua.
Cov lus nug nquag
Q1. Puas yog SUS316 ib txwm zoo dua SUS304?
Tsis yog rau txhua daim ntawv thov. SUS316 muaj cov tshuaj chloride zoo dua thiab pitting tsis kam, tab sis rau cov khoom siv sab hauv qhuav, kev sib cuag cov khoom noj tsis muaj cov tshuaj ntxuav tes, thiab cov kev pabcuam huab cua, SUS304 muab qhov sib npaug ntawm tus nqi qis. Kev xaiv yuav tsum yog nyob ntawm qhov chaw pabcuam tiag tiag.
Q2. Puas yog SUS304 thiab SUS316 sib nqus?
Ob leeg yog austenitic thiab qhov tseem ceeb tsis yog -magnetic nyob rau hauv annealed mob. Kev ua haujlwm txias xws li kev sib sau hnyav lossis machining tuaj yeem hloov ib feem ntawm cov qauv mus rau martensite, ua rau cov khoom sib nqus me ntsis. Ferritic qib xws li SUS430 yog cov hlau nplaum.
Q3. Kuv tuaj yeem qhia SUS304 thiab SUS316 sib nrug li cas?
Visually ob yog tib yam. Kev txheeb xyuas kev ntseeg siab yuav tsum muaj daim ntawv pov thawj zeb kuaj lossis kuaj tshuaj rau molybdenum. Kev soj ntsuam kuaj ib JIS G1253 lossis zoo sib xws yog qhov tseeb.
Q4. 18-8 stainless hlau txhais li cas?
Nws hais txog qhov kwv yees muaj pes tsawg leeg ntawm SUS304: txog 18% chromium thiab 8% npib tsib xee. Lub sij hawm yog siv xoob rau 304 tsev neeg, suav nrog qis -carbon thiab stabilized variants.
Q5. SUS316 puas tuaj yeem siv rau hauv dej hiav txwv?
Hauv cov huab cua me me hauv hiav txwv thiab thaj chaw txaws, SUS316 ua tau zoo. Rau kev tso dej mus tas li hauv dej hiav txwv lossis hauv qhov tsis muaj zog, creviced tej yam kev mob, pitting thiab crevice corrosion tseem tuaj yeem tshwm sim, thiab siab dua - cov ntaub ntawv alloy xws li 6% molybdenum super- qib austenitic lossis duplex feem ntau tau teev tseg.
Q6. Vim li cas SUS316 kim dua SUS304?
Vim yog cov ntsiab lus ntau dua nickel thiab qhov sib ntxiv ntawm molybdenum, ob qho tib si yog cov khoom siv alloying kim heev. Tus nqi sib txawv hloov nrog nickel thiab molybdenum ua lag luam tus nqi.
Xa kev nug