321H thiab 317Lua hauj lwm raws li ob yam austenitic stainless hlau. Lawv nyob rau tib lub chromium-nickel alloy system, tab sis lawv cov qauv sib txawv ua rau muaj qhov sib txawv ntawm qhov ua tau zoo. HT PIPE yog ib tug thawj coj stockist thiab thoob ntiaj teb exporter nrog ntau tshaj 15 xyoo ntawm kev txawj ntse nyob rau hauv thoob ntiaj teb kev lag luam. Peb muab cov kav dej, daim hlau, cov kab tuav, thiab ntau yam ntawm cov yeeb nkab fittings, flanges, thiab li qub.Tiv tauj pebtam sim no rau cov quotes dawb thiab cov ntaub ntawv khoom ntiag tug.
317l vs 321h Mechanical zog
| Mechanical zog | Tensile, min, ksi [MPa] | Yield, min, ksi [MPa] | Elongation,% (min) |
| 317L | 75【515】 | 30【205】 | 40 |
| 321/H | 75【515】 | 30【205】 | 40 |
Tshuaj muaj pes tsawg leeg ss317l thiab 321h
|
Element Symbol |
Lub Npe Lub Npe |
S321H Stainless Hlau Cov ntsiab lus ntau yam (Faction, %) |
S317L Stainless Hlau Cov ntsiab lus ntau yam (Faction, %) |
|
C |
Cov pa roj carbon |
0.04-0.10 |
Tsawg dua los yog sib npaug li 0.03 |
|
Cr |
Chromium |
17-19 |
16-18 |
|
Ni |
Nickel |
9-12 |
11-15 |
|
Ti |
Titanium |
Ntau dua lossis sib npaug li 5 × C (Titanium cov ntsiab lus tsis tsawg dua 5 npaug ntawm cov ntsiab lus carbon) |
Tsis Ntxiv |
|
Mo |
Molybdenum |
Tsis Ntxiv |
3-4 |
|
Fe |
Hlau |
Tshuav |
Tshuav |
ss321h thiab ss317l Corrosion Resistance Analysis
321H Stainless hlau
Oxidizing Media Performance:Nyob rau hauv nitric acid nrog ib tug concentration ntawm tsawg dua los yog sib npaug rau 65% thiab ib tug kub ntawm tsawg tshaj li los yog sib npaug rau 100 degree, tus nqi corrosion yog<0.1 mm/year, superior to 304 stainless steel, in NaOH solution with a concentration of ≤50% and a temperature of ≤100℃, the corrosion rate is <0.05 mm/year, far exceeding the performance of carbon steel.
Tsis muaj zog:The critical pitting temperature in 3.5% NaCl solution is only 25-30℃, making it prone to pitting corrosion in high-temperature seawater environments, stress corrosion cracking may occur when the H₂S partial pressure is >0.00035MPa.
Core Advantages:Titanium stabilization tsim inhibits carbide nag lossis daus, tswj kev ua haujlwm zoo rau intergranular corrosion tom qab vuam.
317L Stainless hlau
Muaj zog Corrosion Adaptability:Cov ntsiab lus siab molybdenum ua rau nws tiv taus cov organic acids xws li sulfides, acetic acid, thiab formic acid. Nws corrosion kuj nyob rau hauv chloride ib puag ncig deb tshaj li cov pa austenitic stainless hlau.
Vuam Stability:Ultra- tsim cov pa roj carbon tsawg kom ntseeg tau tias nws tuav nws cov kev tiv thaiv rau intergranular corrosion tsis muaj kev kho cua sov tom qab vuam.
Performance Positioning:Qhov tseem ceeb pitting kub 45-50 degree, ho siab tshaj 321H, muab muaj zog tiv thaiv rau hnyav corrosive ib puag ncig.
s321h thiab s317l Kev tsim cov txheej txheem sib txawv
s321H Stainless hlau
Kub ua haujlwm:Cov cua kub kub 1150-1250 degree, tuav rau 30 feeb mus rau 2 teev, cua txias lossis cua sov cua txias. Kev tswj qhov kub thiab txias yog qhov yuav tsum tau ua kom tsis txhob muaj cov qoob loo loj hlob lossis deformation nyuaj.
Ua haujlwm txias:Lub zog tuaj yeem txhim kho los ntawm kev ua kom txias txias thiab kos duab txias, tab sis kev tswj kev ntxhov siab seem yog qhov tsim nyog. Kev txhaj tshuaj peening tej zaum yuav tsum tau yog tias tsim nyog.
Vuam:Kev ruaj ntseg ntawm tshav kub- thaj tsam cuam tshuam xav tau kev saib xyuas. titanium tuaj yeem txo qhov kev pheej hmoo ntawm vuam embrittlement, tab sis overheating yuav tsum tau zam.
s317L Stainless hlau
Kub ua haujlwm:Kub dov kub 1200-900 degree, qhov kawg dov kub siab tshaj los yog sib npaug rau 900 degree, tiv thaiv σ theem nag lossis daus ua rau brittleness.
Ua haujlwm txias:High work hardening rate, intermediate annealing (600-650℃) is required to restore plasticity when deformation >15%.
Vuam:TIG vuam lossis laser vuam yog pom zoo. Vuam hlau yuav tsum sib phim rau 317L muaj pes tsawg leeg. Hla qhov kub tsawg dua lossis sib npaug li 150 degree, tsis muaj kev tshaj tawm -weld cua sov yuav tsum tau kho.
Machining:Austenitic qauv ua rau ua hauj lwm hardening; qis txiav ceev (<30m/min) is required. Carbide or ceramic-coated tools should be used.
Cov lus qhia xaiv
Ua ntej 321H:High temperature (>537 degree), oxidizing media, welding daim ntaub ntawv yuav tsum tau tiv thaiv intergranular corrosion (xws li, boilers, pa system).
Qhov tseem ceeb 317L:SUS 317L yog qhov zoo dua rau cov khoom siv hauv qhov chaw hnyav hnyav xws li cov kua qaub muaj zog, cov chlorides siab, thiab cov organic acids, uas yuav tsum muaj cov yas siab thiab yooj yim ntawm vuam (xws li cov tshuaj reactors thiab cov thawv tshuaj dawb).
