Dab tsi yog qhov txawv ntawm ASTM 304 thiab ASTM 316?
Dec 17, 2025
Tso lus
Dab tsi yog qhov txawv ntawm ASTM 304 thiab ASTM 316?
Dab tsi yog qhov txawv ntawm ASTM 304 thiab ASTM 316?
Lub ntsiab sib txawv ntawm ASTM 304 thiab 316 stainless hlau nyob rau hauv lawv cov tshuaj muaj pes tsawg leeg, tshwj xeeb tshaj yog ntxiv ntawm molybdenum rau 316 stainless hlau. Qhov no ua rau 316 stainless hlau resistant rau chlorides, pitting, thiab corrosion, ua rau nws zoo tagnrho rau marine / ntug hiav txwv dej thiab tshuaj ib puag ncig. 304 stainless hlau, ntawm qhov tod tes, yog ib tug dav - stainless hlau lub hom phiaj haum rau feem ntau daim ntaub ntawv uas siab corrosion kuj tsis yuav tsum tau. Vim nws qhov kev ua tau zoo tshaj, 316 stainless hlau kuj tseem kim dua.
Dab tsi yog qhov tsis zoo ntawm 304 stainless hlau?
Ib qho tsis zoo ntawm 304 stainless hlau yog nws qhov ua tau rau pitting corrosion, los yog hauv zos corrosion, tshwj xeeb tshaj yog thaum raug cov tshuaj chloride siab los yog dej ntsev ib puag ncig. Txawm tias chloride concentrations tsawg li 25 ppm tuaj yeem ua rau pitting corrosion.
Dab tsi yog 304 stainless hlau?
304 stainless hlau (EN 1.4301/X5CrNi18-10), tseem hu ua 18/8 stainless hlau (xa mus rau nws cov ntsiab lus chromium thiab npib tsib xee), yog cov qauv kev lag luam rau kev siv dav dav -cov ntawv siv stainless hlau vim nws cov corrosion kuj zoo heev, kev ua haujlwm yooj yim, thiab cov nqi siv tau.
Dab tsi yog 316 stainless hlau?
316 stainless hlau (EN 1.4401 / X5CrNiMo17-12-2) zoo ib yam li 304 stainless hlau tab sis muaj molybdenum (Mo)-ib qho khoom siv alloying uas txhim kho nws txoj kev tiv thaiv corrosion los ntawm chlorides, acids, thiab dej ntsev.
Chemical Composition ntawm 304 vs 316 Stainless hlau
Qhov sib txawv tseem ceeb hauv kev sib xyaw ntawm 304 stainless hlau thiab 316 stainless hlau yog nyob rau hauv cov ntsiab lus ntawm npib tsib xee thiab molybdenum. 316 stainless hlau muaj ntau nickel thiab tau ntxiv molybdenum, uas muab nws superior corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv chloride ib puag ncig thiab hnyav hnyav.
| Element | 304 (Wt.%) | 316 (Wt.%) |
| Hlau, Fe | Tshuav | Tshuav |
| Chromium, Cr | 18.0 – 20.0 | 16.0 – 18.0 |
| Nickel, Nia | 8.0 – 10.5 | 10.0 – 14.0 |
| Molybdenum, Mo | – | 2.0 – 3.0 |
| Manganese, Mn | Tsawg dua lossis sib npaug li 2.0 | Tsawg dua lossis sib npaug li 2.0 |
| Carbon, C | Tsawg dua los yog sib npaug li 0.08 | Tsawg dua los yog sib npaug li 0.08 |
| Silicon, Sib | Tsawg dua los yog sib npaug rau 1.0 | Tsawg dua los yog sib npaug rau 1.0 |
| Phosphorus, P | Tsawg dua lossis sib npaug li 0.045 | Tsawg dua lossis sib npaug li 0.045 |
| Sulfur, S | Tsawg dua lossis sib npaug li 0.03 | Tsawg dua lossis sib npaug li 0.03 |
Cov qauv rau stainless hlau 304 thiab 316 cov khoom
| Cov kav dej | Cov raj |
|---|---|
| ASTM A312 TP 304 Cov Lus Qhia Tshwj Xeeb | TIAB SA 213 TP 304 |
| ASTM A 312 TP 304L | SA 213 TP 304L |
| ASTM A 312 TP 316 1 | SA 213 TP 316 |
| ASTM A 312 TP 316L | SA 213 TP 316L |
| ASTM A312 TP 321 Cov Lus Qhia Tshwj Xeeb | TIAB SA 213 TP321 |
ASTM cov qauv txhais 304 thiab 316 stainless hlau raws li lawv cov tshuaj muaj pes tsawg leeg, feem ntau suav nrog chromium, npib tsib xee, thiab cov ntsiab lus sib txawv ntawm molybdenum (316 stainless hlau muaj molybdenum). Cov qauv muaj xws li ASTM A240 (phaj / ntawv), A276 (bars / profile), A312 (pipes), thiab A269 (tubing) . 304 stainless hlau yog ib qho dav - lub hom phiaj stainless hlau, thaum 316 stainless hlau, vim nws cov ntsiab lus molybdenum, muaj kev tiv thaiv corrosion, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig chloride.
Lub ntsiab ASTM cov qauv rau 304 thiab 316 stainless hlau, categorized los ntawm hom khoom
Phaj, Sheets, & Coils:ASTM A240 / A240M (nrog rau 304/304L & 316/316L).
Bars & Shapes:ASTM A276 (rau cov kev cai dav dav).
Cov kav dej (Seamless & Welded):ASTM A312 / A312M (TP 304, TP316).
Tubing (Lub hom phiaj dav dav):ASTM A269 (nrog 304/304L & 316/316L).
Bolts / Fasteners:Feem ntau khi rau A193 / A194 rau qhov kub siab, tab sis cia siab rau cov khoom siv xws li F593 (304/316).
Cov lus sib piv ntawm cov khoom siv kho tshuab ntawm 304 stainless hlau thiab 316 stainless hlau:
| Khoom | Stainless hlau 304 | Stainless hlau 316 |
|---|---|---|
| Tensile zog (MPa, min) | 515 | 515 |
| Yield zog (0.2% Offset, MPa, min) | 205 | 205 |
| Elongation (% hauv 50 hli, min) | 40 | 40 |
| Hardness (Rockwell B, max) | 92 PAB | 95 PAB |
| Hardness (Brinell, max) | 201 HB | 217 HB |
| Modulus ntawm Elasticity (GPa) | 193 | 193 |
| Qhov ceev (g / cm³) | 8.00 | 8.00 |
| Melting Range (zeeg) | 1400 – 1450 | 1375 – 1400 |
| Primary Corrosion Resistance | Zoo dav dav corrosion kuj, tsis zoo nyob rau hauv chlorides | Zoo heev corrosion kuj, tshwj xeeb tshaj yog rau chlorides thiab acids |
| Hom Max Service Temperature (Nruam) | 870 degree | 870 degree |
| Impact Strength (Charpy V-Notch, J) | Ntau tshaj los yog sib npaug rau 100 | Ntau tshaj los yog sib npaug rau 100 |
Cov ntsiab lus tseem ceeb:
304: Standard austenitic stainless hlau, nrog zoo corrosion kuj (muaj 18% chromium thiab 8% npib tsib xee).
316: Vim yog qhov sib ntxiv ntawm 2-3% molybdenum, nws muaj zog corrosion kuj thiab yog haum rau marine / chloride ib puag ncig (muaj 16% chromium, 10% nickel, thiab molybdenum).
Vim li cas thiaj xaiv Gnee ua koj cov khoom siv stainless hlau?
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📦 Ntim thiab Shipping
Tag nrho cov khoom siv stainless hlau tau ntim raws li hauv qab no:
Ntoo pallets lossis ntoo crates
Moisture -cov ntaub ntawv pov thawj
Sau npe nrog tus lej xov tooj cua sov, tus qauv, thiab qhov ntev
Shipped thoob ntiaj teb los ntawm hiav txwv, huab cua, los yog xa tawm
Gnee Steel yog ib lub chaw muag khoom ntawm ASTM A213 stainless hlau 304, muab ntau yam khoom xws li: Cov kav dej: Seamless kav: Qhov ntau thiab tsawg: 4 - 219 hli; Thickness: 0.5 - 20 hli; Welded kav: Qhov ntau thiab tsawg: 5.0 - 1219.2 hli; Thickness: 0.5 - 20 hli; Phaj: Phaj thickness 0.1 txog 100 hli; Phaj dav 10-2500 mm; Daim kab xev; Alloy round bars: Txoj kab uas hla 3-800 mm; Flat tuav: Thickness 2-100 mm; Dav: 10-500 mm; Hexagonal tuav: 2-100 hli; Hlau thiab extruded profiles. Peb koom tes nrog steel mills los muab peb cov neeg muas zaub nrog 304 stainless hlau, uas nws cov khoom ua tau raws li los yog ntau tshaj cov qauv kev lag luam, xws li ASTM, ASME, SAE, AMS, ISO, DIN, EN, thiab BS cov qauv.
Gnee Steel stocks thiab muag ASTM A213 stainless hlau 304, kav, raj, phaj, strips, nplooj ntawv, puag ncig tuav, tiaj tuav, forged billets, hexagonal hlau, nyob ntawm tej, thiab extruded profiles. Thov koj xav tiv tauj peb ntawm email ntawmsales@gneestainless.comrau ib nqe lus.
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