Ob qho khoom siv ua cov yeeb nkab luj tshib - tab sis lawv daws teeb meem sib txawv. Aluminium yeej ntawm qhov hnyav, nqi thiab xeb - pabcuam huab cua dawb; stainless yeej ntawm qhov kub thiab txias, txhoj puab heev- tawm tsam thiab nyias- phab ntsa siab ntsuas. Phau ntawv qhia no muab piv rau lawv thoob plaws rau lub ntsiab lus uas txiav txim siab yuav khoom tiag tiag, tom qab ntawd muab lub rooj txiav txim ncaj nraim rau koj.
Aluminium vs Stainless hlau luj tshib
| Khoom | Aluminium (6061-T6) | Stainless hlau (304/316) |
|---|---|---|
| Qhov ntom | 2.70 g / cm³ - txog ⅓ steel | 7.93 g / cm³ (304) / 7.98 g / cm³ (316) qhov hnyav |
| Tensile zog | Ntau dua lossis sib npaug rau 290 MPa (6061-T6) | ≈ 515 MPa (304 annealed) |
| Ntev -lub sijhawm ua haujlwm kub | ≈ 120℃max (derate saum toj no) | Mus txog ≈ 870℃txuas ntxiv |
| Melting point | 660 degree | ≈ 1400-1450 degree |
| Corrosion nyob rau hauv huab cua / dej tshiab | Zoo heev - ntuj oxide zaj duab xis | Zoo heev |
| Corrosion nyob rau hauv seawater / chlorides | Zoo nrog 5xxx alloys (5083); xav tau kev cais tawm ntawm cov hlau tsis sib xws | Zoo heev nrog 316 / duplex |
| Modulus ntawm elasticity | ≈ 69 GPa (deflects ntau) | ≈ 200 GPa (stiffer) |
| Rust / internal contamination | Tsis muaj xeb - ua kom compressed cua huv si | Tsis muaj xeb |
| Tus nqi ntawm cov khoom siv txheeb ze | Tsawg ib kg | Siab dua ib kg |
| Installation & freight | Sib dua - sai dua, pheej yig dua | Kev txhawb nqa hnyav dua - ntau dua, kev ua haujlwm ntau dua |
| Galvanic pheej hmoo nrog cov hlau tsis sib xws | Anodic - corrodes yog txuas rau hlau / stainless yam tsis muaj kev sib cais | Cathodic - feem ntau muaj kev nyab xeeb raws li tus khub passive |
Cov peev txheej: ASM Phau Ntawv Qhia Vol. 2 (cov khoom siv tshuab), MatWeb (qhov ntom ntom / modulus), ASTM B221 (cov txwv alloy). Kev ntsuas kub thiab ntsuas kub yuav tsum tau lees paub los ntawm qhov project xam ib ASME B31.3 / B31.1.
1 · Nyhav & tuav
Aluminium qhov ceev yog 2.70 g / cm³ piv rau 7.93 g / cm³ rau 304 stainless -aluminium luj tshib hnyav li ib -feem peb ntawm qhov sib npaug stainless. Hauv kev xyaum: tus nqi thauj khoom qis dua, kev tuav tau yooj yim dua hauv qhov chaw kaw, cov qauv kev txhawb nqa sib dua, thiab txo qhov hnyav saum toj kawg nkaus ntawm cov nkoj thiab cov khoom tawm sab nraud. Qhov no yog ib qho laj thawj loj tshaj plaws txhuas tau teev tseg rau marine, compressed -air thiab modular systems.
2 · Corrosion Resistance
Aluminium tiv thaiv nws tus kheej nrog tus kheej - kho oxide zaj duab xis - zoo heev nyob rau hauv atmospheric, ntub thiab tshiab - dej kev pab cuam, thiab nwsyeej tsis rusts sab hauv, uas ua kom compressed cua thiab ntsuas kab huv si. Stainless hlau resists tshuaj lom neeg thiab tshuaj tua kab mob, uas yog vim li cas 316 / duplex tau teev tseg rau seawater piping, aggressive chemicals thiab noj qab haus huv kab. Hauv dej ntsev, siv 5xxx aluminium alloys (5083/5086) nrog kev sib cais kom raug; tsis txhob cia siab rau 6061.
3 · Kub txwv
Qhov no yog qhov uas ob cov ntaub ntawv faib txoj kev.Aluminium melts ntawm 660℃thiab poob lub zog zoo hauv qab ntawd;lub tswv yim ntev - lub sij hawm qab nthab yog hais txog 120 degree, nrog derating yuav tsum tau saum toj no. Stainless hlau ua haujlwm tsis tu ncua txog li 870 degree. Txoj cai ntawm tus ntiv tes xoo:yog tias koj cov kab khiav saum toj 120℃- chav, roj kub, tso pa tawm, txheej txheem cua sov - txhuas yog tawm ntawm qhov.Hauv qab 120 degree, txhuas lub teeb yuag thiab tus nqi qis ua rau nws yuav smarter.
4 · Siab ntsuas
Rau tib lub phab ntsa tuab, stainless hlau muaj zog (≈515 MPa vs ≈290 MPa rau 6061-T6). Tab sis txhuas lub luj tshib muaj nyob rau hauv cov phab ntsa tuab, thiab cov kev ntsuam xyuas yog xam rau ib tus lej (Barlow's formula P=2St/D nyob rau hauv ASME B31.3). Qhov ntes:aluminium lub qis elastic modulus (69 GPa vs 200 GPa) txhais tau tias ntau deflection, yog li kev khiav tsis txhawb nqa ntev yuav tsum muaj kev txhawb nqa ze dua. Rau ib txwm qis-rau- cov kev pabcuam siab nruab nrab (cov cua compressed ntawm PN16 / 16 bar, dej, HVAC), aluminium phab ntsa thicknesses zoo kawg nkaus txaus - thiab tseem sib dua tag nrho.
5 · Weldability & Installation
Ob leeg weld zoo, tab sis txawv. Txhuas yuav tsum tau TIG nrog ib tug huv oxide-dawb nto (ER4043 rau 6061, ER5356 rau 5083) thiab ib tug tshwj xeeb stainless- txhuam hlau - paug yog qhov #1 ua rau ua tsis tau tejyam txhuas welds. Nco ntsoov tiasvuam T6 temper txo lub zog nyob rau hauv tshav kub- cuam tshuam cheeb tsam, yog li welded aluminium pob qij txha suav nrog txo cov khoom tsim. Stainless welds yog ntau zam txim rau cov neeg cog lus tab sis hnyav dua los tuav. Rau cov cuab yeej- sib dhos pub dawb, aluminium thawb- haum tshuab (NBR seals + stainless clamp rings) nruab ib feem ntawm lub sijhawm ntawm cov hlau welded.
6 · Tus nqi ntawm cov tswv cuab
Stainless tus nqi ntau dua ib kilogram thiab xav tau cov khoom siv ntau dua rau qhov sib npaug, tab sis nws nyias - phab ntsa muaj peev xwm offsets qee qhov ntawd. Sib pivtag nrho cov nqi nruab: aluminium yeej ntawm freight, tuav, installation ua hauj lwm thiab kev txhawb nqa qauv; stainless yeej qhov twg cov phab ntsa nyias thiab cov kev ntsuas siab tseem ceeb, lossis qhov twg cov xov xwm xav tau nws. Rau ib tug raug compressed - huab cua los yog marine auxiliary system, txhuas tus nqi ntsia feem ntau yog tus lej qis.
Kev siv ntawm aluminium luj tshib
Tsawg-rau- nruab nrab siab, qhov kub thiab txias, qhov hnyav- lossis tus nqi- cov tshuab rhiab heev.
Qhov zoo tshaj plaws haum:
Compressed cua & nitrogen tes hauj lwm (PN16 chav kawm)
Marine & offshore auxiliary piping (5083, hnyav txuag)
HVAC, kev kho dej, cua txias loops
Automotive / turbo intercooler & intake piping
Architectural thiab pom pipework nrog anodized tiav
Tej yaam num uas freight thiab installation ua hauj lwm teeb meem
Daim ntawv thov ntawm Stainless hlau luj tshib
Kev kub siab, kev tawm tsam hnyav, kev tu cev, lossis nyias - phab ntsa siab.
Qhov zoo tshaj plaws haum:
Chav, kub- roj thiab cov kab tso tawm saum 120 degree
Seawater thiab chloride-kev pabcuam tshuaj hnyav (316/duplex)
Khoom noj khoom haus, dej haus thiab tshuaj txheej txheem kab
High-siab hydraulic systems nrog nyias- phab ntsa yuav tsum
Corrosive acid / alkali hloov qhov twg txhuas tsis tuaj yeem hla
Kev khiav ntev yuav tsum muaj kev nruj nruj yam tsis muaj kev txhawb nqa ntxiv
Galvanic corrosion ceeb toom:aluminium yog anodic rau stainless hlau. Yog hais tias lub luj tshib aluminium yog bolted los yog flanged ncaj qha mus rau ib tug stainless tivthaivtsis muaj kev sib cais, aluminium sab corrodes nyiam tshaj - tshwj xeeb tshaj yog nyob rau hauv ntub dej los yog ntsev. Siv dielectric gaskets, lub tes tsho insulating, coated fasteners thiab tswj cov kua dej ntawm txhua txhua txhuas - mus rau - stainless interface. Thaum tsis ntseeg, cais tawm.
Media yog chav, roj kub, tso tawm?
→ Stainless hlauKab kub> 120 degree?
→ Stainless hlauDej hiav txwv los yog muaj zog chlorides?
→ Stainless (316) lossis 5083 Al nrog kev sib caisCompressed cua / nitrogen / nqus tsev?
→ AluminiumQhov hnyav lossis tus nqi thauj khoom tseem ceeb?
→ AluminiumCov peev nyiaj-sensitive, Tsawg dua lossis sib npaug li 120 degree, nruab nrab siab?
→ Aluminium
FAQ
Yam khoom & Cov lus qhia
Aluminium 90℃luj tshib- Nplooj khoomSpecs, qhov ntev daim ntawv qhia thiab daim ntawv tsocai rau GNEE txhuas lub luj tshib.
6061 vs 6063 Alloy GuideQhov twg alloy haum rau koj lub siab, marine los yog tiav yuav tsum tau.
Kev Ntsuas Kev Ntsuas & Kev Ntsuas Kev NtsuasYuav ua li cas txheeb xyuas qhov ntsuas nrog ASME B31.3 thiab Barlow's formula.
Xa koj cov kev ua haujlwm rau peb
Qhia rau peb cov xov xwm, siab, kub thiab qhov loj me - peb cov engineers yuav pom zoo cov khoom siv thiab xa ib nqe lus nrog cov ntaub ntawv.
Tau txais cov lus qhia EngineeringGNEE Aluminium
Aluminium yeeb nkab fittings manufacturers
gnealuminum.com
Sib piv
NPT vs BSP Phau Ntawv Qhia
Kub txwv
Tau txais cov lus hais hauv 24 teev
