Monel 400 (UNS N04400, DIN 2.4360)yog ib qho -theem npib tsib xee- tooj liab khoom- tov alloy. Kwv yees li 63% npib tsib xee, 28-34% tooj liab, nrog tswj cov nyiaj hlau, manganese, thiab silicon. Tsis zoo li duplex lossis nag lossis daus- qib hardenable, tsis muaj theem nrab los nag thaum lub sijhawm vuam - tsis muaj qhov xav tau, tsis muaj theem sigma, tsis muaj qhov sib txuam ntawm cov ciam teb. Qhov ntawd ua rau Monel 400 tiag tiag zam txim rau vuam piv rau feem ntau cov nickel alloys.
Welded Monel 400 yeeb nkab yog tsim raws li ASTM B725 / ASME SB725.Txoj kev tsim khoom: sawb lossis phaj yog tsim rau hauv ib lub tog raj kheej thiab koom nrog cov hlua txuas ntev ntev - feem ntau autogenous GTAW (gas tungsten arc vuam) rau cov phab ntsa sib zog, lossis GTAW nrog cov muab tub lim rau cov sij hawm hnyav dua. Weld seam yuav tsum tau annealed tom qab vuam kom rov ua haujlwm corrosion hauv tshav kub- cuam tshuam cheeb tsam (HAZ).
HT PIPE is amonel 400 alloy yeeb nkabtus xa khoom nrog 15+ kev xa tawm.Tiv tauj pebkom paub ntau ntxiv thiab quotes dawb!
Cov Khoom Muag Khoom
Bar & Rod
Phaj & Ntawv
Coil & Sawb
Tube & Tube
Haum: Flange, Tee, Luj Tshib, Reducer thiab lwm yam.
Forging: Nplhaib, Ncej, Vajvoog, Thaiv thiab lwm yam.
| Parameter | ASTM B165 (tsis muaj seamless) | ASTM B725 (welded yeeb nkab) |
|---|---|---|
| Kev tsim khoom | Extruded / txias- kos los ntawm billet | Tsim sawb + longitudinal weld |
| ASME B31.3 sib koom ua haujlwm | 1.0 (tsis muaj) | 0.85 (welded, radiographed) lossis 0.80 (qhov chaw RT) |
| Siab derating | Tag nrho cov sij hawm ntsuas | Feem ntau 85% ntawm seamless sib npaug |
| Standard NPS ntau yam | 1/8 "- 10" ntau | 1/8 "- 30" + (kev lag luam siab dua 4") |
| Tus nqi vs seamless (qhov loj me) | Lub hauv paus | 15-35% qis dua 4 "NPS |
| Lub Sijhawm Lead (loj diameters) | Ntev dua | luv dua |
| Weld seam NDE | N/A | Eddy tam sim no lossis UT rau ASTM E213 / E309; RT thaum tau teev tseg |
UNS N04400 Composition (rau ASTM B725)
| Lub ntsiab | Cov ntsiab lus (wt%) | Lub luag haujlwm |
|---|---|---|
| Nickel (+ Co) | 6 3,0mn | Base - tsav corrosion kuj |
| Tooj | 28.0 – 34.0 | Khoom -kev daws teeb meem, dej hiav txwv tsis kam |
| Hlau | 2.50 max | Tswj tau - me me zog |
| Manganese | max 2.00 Nws | Deoxidizer, kub ua haujlwm |
| Silicon | 0.50 max | Weldability tswj |
| Cov pa roj carbon | 0.30 max | Khaws qis kom tsis txhob muaj carbide nag lossis daus |
| Sulfur | 0.024 max | Tight tswj rau weld soundness |
Mechanical Properties - Annealed Condition
| Khoom | ASTM B725 Yam tsawg kawg nkaus | Hom Annealed Range |
|---|---|---|
| Lub zog tensile | 480 MPa (70 ksi) | 482-620 MPa |
| Yield zog (0.2% offset) | 195 MPa (28 ksi) | 195-310 MPa |
| Elongation hauv 50 mm | 35% | 35 – 50% |
| Hardness | - | 125 - 190 HB (65 - 80 HRB) |
| Qhov ntom | - | 8.80 g / cm³ |
| Melting ntau | - | 1300 - 1350 degree |
| Modulus ntawm elasticity | - | 179 gp ua |
Vuam Monel 400: Filler Metals, Txheej Txheem, thiab HAZ Cwj Pwm
Qhov no yog qhov uas feem ntau cov nplooj ntawv xa khoom mus nyias. Qhov vuam ntawmMonel 400 welded kavtsim nyog tau txais kev saib xyuas tiag tiag vim tias qhov vuam seam yog lub ntsiab lus ntawm B725 cov khoom.
Filler Hlau Xaiv
| Txheej txheem | Filler | AWS Classification | Sau ntawv |
|---|---|---|---|
| GMAW / GMAW | ERNiCu-7 hlau | AWS A5.14 | "Monel 60" - txuam muab tub lim, feem ntau |
| SMAW | ENiCu-7 npog electrode | AWS A5.11 | "Monel 190" - rau thaj chaw welds thiab kho |
ERNiCu-7 muaj cov titanium me me ntxiv (feem ntau 2.5–3.5%) uas ua raws li deoxidizer thiab tiv thaiv weld hlau porosity. Nws yog tus mus-rau muab tub lim rau ob lub khw fabrication ntawm welded yeeb nkab thiab teb girth welds nyob rau hauv piping systems. Yog tias koj txuas Monel 400 rau cov hlau tsis sib xws (xws li carbon steel lossis stainless), ERNi-1 (AWS A5.14, npib tsib xee ntshiab) yog lwm txoj hauv kev uas txo cov kev pheej hmoo tawg.
Qhov tseem ceeb Welding Parameters thiab kev txiav txim siab
Preheat:Tsis xav tau. Monel 400 lub siab thermal conductivity (21 W / m·K - txog 4 × ntawm austenitic stainless hlau) txhais tau tias cua sov dissipates sai, yog li koj xav tau txaus amperage los tuav lub pas dej ruaj khov, tab sis tsis muaj preheating yog tsim nyog.
Interpass kub:Khaws hauv qab 150 degree. Kev sib cuam tshuam ntau dhau tshav kub tuaj yeem nthuav dav HAZ thiab ua kom cov weld- nyob ib sab.
Tiv thaiv Gas:100% argon rau GTAW yog tus qauv. Rau GMAW, argon nrog me me helium ntxiv (piv txwv li, 75Ar / 25He) txhim kho kev nkag mus thiab kev nrawm.
Tom qab-weld heat treatment (PWHT):Monel 400 uatsis yogxav tau PWHT tom qab vuam. Tsis muaj kev ntxhov siab-kev pab cuam anneal raug yuam los ntawm ASME B31.3 lossis los ntawm ASTM B725. Txawm li cas los xij, txoj hlua txuas ntev ntawm B725 yeeb nkab yuav tsum tau muab tso rau hauv - txheej txheem los ntawm cov chaw tsim khoom kom rov ua kom muaj kev tiv thaiv corrosion tag nrho hauv HAZ - qhov no yog qhov yuav tsum tau ua, tsis yog ib qho chaw.
Pickling:Tom qab vuam, lub teeb oxide tint nyob rau hauv HAZ yuav tsum tau muab tshem tawm los ntawm pickling (ib tug nitric -hydrofluoric acid sib tov yog tus qauv rau npib tsib xee alloys) los yog los ntawm mechanical tu tom qab passivation. Kev hla cov kauj ruam no tawm ntawm cov txheej txheem oxide uas tuaj yeem ua raws li qhov nyiam tshaj plaws corrosion pib qhov chaw, tshwj xeeb tshaj yog nyob rau hauv seawater thiab chloride ib puag ncig.
Cov lus nug nquag
Dab tsi yog qhov txawv ntawm ASTM B165 thiab ASTM B725 rau Monel 400 yeeb nkab?
ASTM B165 npog seamless Monel 400 yeeb nkab (tsim los ntawm extrusion los yog txias kos los ntawm ib tug khoom billet, tsis muaj weld seam). ASTM B725 npog welded Monel 400 yeeb nkab (tsim los ntawm kev sib sau sawb los yog phaj rau hauv lub tog raj kheej thiab koom nrog ib tug longitudinal weld seam). B165 seamless muaj kev sib koom ua haujlwm ntawm 1.0 hauv ASME B31.3; B725 welded muaj 0.85 (nrog tag nrho RT) lossis 0.80 (nrog RT). B725 feem ntau yog 15-35% pheej yig dua B165 hauv qhov sib npaug ntau tshaj 4 "NPS.
Monel 400 welded yeeb nkab puas tuaj yeem siv rau hauv kev pabcuam qaub (H₂S ib puag ncig)?
Yog lawm. Monel 400 tau teev nyob rau hauv NACE MR0175 / ISO 15156 rau kev pabcuam qaub. Lub alloy yog resistant rau sulfide kev nyuaj siab tawg (SSC) nyob rau hauv lub annealed mob. Rau welded yeeb nkab nyob rau hauv qaub kev pab cuam, qhia meej tias cov weld seam tau annealed thiab hais tias cov cua sov chemistry raws li NACE cov cai. Cov ntaub ntawv kev pabcuam qaub yuav tsum nrog MTC.
Monel 400 welded yeeb nkab puas yuav tsum tau tom qab-weld kev kho cua sov?
Tsis yog. Monel 400 yog ib qho khoom siv - kev daws teeb meem, ib zaug -theem alloy tsis muaj theem hloov pauv. Tsis muaj kev ntxhov siab -relief anneal lossis PWHT yuav tsum tau tom qab vuam - tsis yog los ntawm ASTM B725 los yog ASME B31.3. Lub longitudinal weld seam ntawm B725 yeeb nkab yuav tsum tau muab tshem tawm thaum lub sij hawm tsim khoom los ntawm cov chaw tsim khoom, tab sis qhov no yog cov kauj ruam tsim khoom, tsis yog qhov yuav tsum tau ua.
Qhov siab tshaj plaws ua haujlwm kub rau Monel 400 welded yeeb nkab yog dab tsi?
Qhov pom zoo rau qhov kev pabcuam siab kub yog kwv yees li 480℃(900℃F) rau kev pabcuam txuas ntxiv. luv- lub sij hawm excursions saum toj no yog tolerable. Ntawm qhov kub siab tshaj 540 degree, Monel 400 tuaj yeem ntsib oxidation thiab yuav tsum tau hloov nrog ntau dua -nickel alloy (xws li Inconel 600 lossis 625) rau kev ua haujlwm siab - kub.
Monel 400 welded yeeb nkab nqi pes tsawg xyoo 2025?
Qhov taw qhia 2025 tus nqi rau ASTM B725 Monel 400 welded yeeb nkab yog kwv yees li ntawm 30-45 / kgex-works (Tuam Tshoj / Indianmill) txog 30-45 / kgex-works (Tuam Tshoj / Indianmill) txog 38-55 / kg los ntawm European distributors. Tus nqi tsaws rau Middle East cov chaw (xws li kev thauj khoom, lub luag haujlwm, thiab thib peb{10}} ntawv pov thawj tog) feem ntau yog $41–48/kg. Tus nqi taug qab LME npib tsib xee nrog 30-60 hnub lag luam - thov ib daim ntawv tso cai rau cov nqi lag luam tam sim no.
Dab tsi welding muab tub lim kuv yuav tsum siv rau Monel 400 yeeb nkab?
Use ERNiCu-7 (AWS A5.14, trade name "Monel 60") for GTAW/GMAW, or ENiCu-7 (AWS A5.11, trade name "Monel 190") for SMAW. ERNiCu-7 muaj cov titanium ntxiv uas tiv thaiv qhov porosity. Tsis xav tau preheat. Tshem tawm cov oxides saum npoo los ntawm HAZ los ntawm pickling lossis kho tshuab tom qab vuam kom tsis txhob muaj qhov zoo tshaj plaws corrosion pib.
