Alloy 31 ASTM B622 UNS N08031 Yeeb Nkab Tube
Hom: Seamless, Welded
OD: 1/2 "-48"
Thickness: SCH5-SCHXXS
Ntev: 0-12M, Customized
Txheej Txheem: Kub / Cold Rolled, Kub ua haujlwm, Txias kos
Zhengzhou Huitong Yeeb Nkab Khoom Co., Ltd. Peb sov siab txais tos koj mus yuav peb cov alloy 31 astm b622 uns n08031 yeeb nkab raj. Peb lub Hoobkas kuj lees txais cov kev txiav txim customized. Thov pub dawb kom txaus siab rau peb cov nqi sib tw thiab kev pabcuam zoo heev.
Alloy 31 Pipe Nqe 2026|ASTM B622 UNS N08031 Tus neeg muag khoom & Tus nqi
Alloy 31 (UNS N08031) yog hlau -nickel-chromium- molybdenum alloy. Nws muaj kev tiv thaiv zoo tshaj rau sulfuric acid thiab chloride-induced corrosion, feem ntau luv nqi ntawm$19–$30/kgnyob rau hauv 2026 nyob ntawm txoj kab uas hla thiab phab ntsa thickness. Nws yog qhov kev xaiv zoo tshaj plaws rau kev ua tshuaj lom neeg, flue gas desulfurization (FGD), thiab marine engineering qhov twg cov hlau tsis huv.
ASTM B622 UNS N08031 Yeeb Nkab Nqe Siv 2026
| Yeeb Nkab Loj | Phab ntsa Thickness | Hom | Tus nqi kwv yees (USD / kg) |
| 1/2" – 2" | SCH 10-40 | Seamless | $15 – $30 |
| 3" – 6" | TSI 40-80 | Seamless | $19 – $29 |
| 8" – 12" | TSI 40-80 | Seamless | $18 – $36 |
| 1/2" – 24" | Ntau yam | Welded | $15 – $30 |
Tiv tauj pebrau tus nqi thiab qhov ntau thiab tsawg.
Alloy 31 yeeb nkab yog npib tsib xee- hlau-chromium- molybdenum-nitrogen austenitic alloy nrog lub zog siab dua li cov hlau tsis zoo xws li 304 thiab 316. ASTM B622 UNS N08031 yeeb nkab muaj nyob rau hauv qhov ntev ntawm 6 hli mus rau 16mm (4mm txog 4mm). Peb tsim nws siv kub- dov thiab txias- cov txheej txheem dov, muab seamless thiab welded versions. Peb muab nws nyob rau hauv annealed, pickled, thiab ci -annealed tej yam kev mob.
Alloy 31 Tube Khoom
- UNS N08031 Alloy 31 yog nickel, chromium thiab molybdenum stainless hlau nrog nitrogen thiab tooj liab ntxiv. Nws ua ke lub zog tensile nruab nrab thiab siab ductility nrog zoo heev corrosion kuj nyob rau hauv sulfuric acid, txo thiab oxidizing media thiab muaj zog tiv thaiv corrosion thiab yaig corrosion nyob rau hauv phosphoric ib puag ncig.
- Feem ntau cov alloy muaj PREN ntawm ntau dua los yog sib npaug rau 48, uas xyuas kom meej tias qhov kev tiv thaiv pitting corrosion yog siab.
- Yog li ntawd, Alloy 31 UNS N08031 Hlau Yeeb Nkab yog dav siv nyob rau hauv ntau daim ntawv thov kev lag luam uas xav tau zoo heev corrosion kuj.
Alloy 31 Pipe yog dab tsi?
ASTM B622 npog seamless npib tsib xee thiab npib tsib xee -cobalt alloy kav, suav nrogUNS N08031 (Alloy 31 / EN 1.4562). Alloy 31 yog ib qho zoo heev austenitic nickel alloy uas muaj kwv yees li 30-32% nickel, 26-28% chromium, thiab 6-7% molybdenum nrog nitrogen thiab tooj liab ntxiv. Cov ntsiab lus no muab kev tiv thaiv zoo rau pitting, crevice corrosion, thiab acidic ib puag ncig.
Cov yam ntxwv tseem ceeb muaj xws li:
- Zoo heev sulfuric acid kuj
- Zoo heev phosphoric acid kuj
- Siab pitting kuj (PREN Ntau dua lossis sib npaug rau 48)
- Superior chloride corrosion kuj
- Zoo mechanical zog thiab ductility
- Haum rau qhov kub thiab txias los ntawm kev pabcuam cryogenic txog li 550 degree
Cov kev lag luam uas muaj xws li:
- Kev ua tshuaj lom neeg
- Roj & Roj
- Dej hiav txwv desalination
- Mining
- Flue Gas Desulfurization (FGD)
- Pulp & Ntawv
Alloy 31 UNS N08031 Pipes Specifications
| Specifications | ASTM A / ASME SA213 / A249 / A269 / A312 / A358 |
| Txheem Loj | 1/8 "NB TO 30" NB IN |
| Alloy 31 Seamless Pipes | 1/2" NB - 16" NB |
| Alloy 31 ERW Yeeb Nkab | 1/2" NB - 24" NB |
| Alloy 31 EFW yeeb nkab | 6" NB - 100" NB |
| Sab nraud | 6.00 hli OD txog 914.4 hli OD, Qhov ntau thiab tsawg mus txog 24 "NB |
| Thickness | 0.3 - 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS, LSAW, SSAW, HSAW |
| Cov txheej txheem tsim khoom | Seamless / ERW / Welded / Fabricated / EFW |
| Cov duab | Round, Ib nrab Round, Square, Rectangular los yog Custom |
| Ntev | Ib qho Random, Ob Chav Random & Custom Length |
| Cov yeeb nkab kawg | Plain End, Beveled kawg, Treaded |
| Daim Ntawv Pov Thawj | EN 10204 3.1 B |
Alloy 31 Khoom
- Resistant alkaline thiab acidic corrosion
- Resistant mus rau high concentrations sulfuric acid
- Resistant rau phosphoric acid
- Resistant kom txo thiab oxidizing ib puag ncig
Alloy 31 Tshuaj muaj pes tsawg leeg
| Lub ntsiab | C | Si | Mn | P | S | Cr | Cu | Fe | Mo | N | Ni |
| Min | - | - | - | - | - | 26 | 1 | Tshuav | 6 | 0.15 | 30 |
| Max | 0.0015 | 0.3 | 2 | 0.02 | 0.01 | 28 | 1.4 | 7 | 0.25 | 32 |
Alloy 31 UNS N08031 Steel Pipe yog tsim raws li cov qauv thoob ntiaj teb: ASTM B622, ASTM B619, thiab DIN 17751. Cov txheej txheem tsim khoom ntawm cov hlau no yog siv cov txheej txheem nqus induction melting (VIM) los tsim cov hlau uas muaj purity thiab zoo. Cov txheej txheem VIM ua kom lub homogeneity ntawm cov hlau, uas ua rau cov khoom siv zoo heev thiab kev tiv thaiv corrosion.
ASTM B622 UNS N08031 Pipes Mechanical Properties
| Kub | Annealed | |
| Tensile Rm | 94 | qis (min) |
| Tensile Rm | 650 | MPa (min) |
| Rp. 0.2% Tawm | 41 | qis (min) |
| Rp. 0.2% Tawm | 280 | MPa (min) |
| Elongation (2.02 lossis 4D gl) | 40 | % (min) |
Kev sib piv ntawm corrosion kub nrog rau lwm yam alloys
| Alloy Qib | Critical pitting | Critical crevice | Pitting kuj |
| corrosion temp.,℃(° F) | corrosion temp.,℃(° F) | sib npaug (PRE) | |
| 316 | 15 (60) | <0 (32) | 24 |
| 904L | 45 (113) | 25 (77) | 37 |
| 31 | 85 (185) | 65 (149) | 54 |
Alloy 31 Lub cev muaj zog:
- Qhov ceev: 8.1 g / cm³
- Melting point: 1350℃(2462℃F)
- Hluav taws xob tiv taus: 82.2 µΩ -cm ntawm 20℃(68℃F)
Daim ntawv thov
- Pulp thiab ntawv kev lag luam
- Flue gas desulphurization – FGD – systems
- Hiav txwv dej kub exchangers
- Petroleum ntau lawm
- Refining kev lag luam
- Mining kev lag luam - ore ua
Alloy 31 vs 904L vs Hastelloy C276
| Khoom | Alloy 31 | 904L | Hastelloy C276 |
| PREN | Ntau dua lossis sib npaug li 48 | ~37 | >65 |
| Sulfuric Acid Resistance | Zoo heev | Zoo | Zoo heev |
| Chloride Pitting Resistance | Zoo heev | Zoo | Zoo heev |
| Nqi | Nruab nrab-High | Nruab nrab | Siab heev |
| Seawater Service | Zoo heev | Zoo | Zoo heev |
| Phosphoric Acid Service | Zoo heev | Zoo | Zoo heev |
| Tus nqi ($/kg) | 20–30 | 6–12 | 35–70 |
Yuav Ua Li Cas Weld Alloy 31 Khoom?
Alloy 31 muaj qhov zoo tshaj plaws weldability, tab sis cov khoom siv hluav taws xob yuav tsum nruj me ntsis tswj kom tsis txhob muaj nag lossis daus ntawm cov theem sib txawv (piv txwv li, Sigma theem) uas tuaj yeem sib koom ua ke. Siv GTAW (TIG) nrog cov hlau muab tub lim sib piv rau lub hauv paus alloy.
Pom zoo muab tub lim hlau:
- ERNiCrMo-3 (Alloy 625)
- ERNiCrMo-13
Vuam Thaum tshav kub kub Tint
- Teeb meem: Thaum tshav kub kub tint tsim txo corrosion kuj.
- Kev daws: Ua kom tiav pickling thiab passivation tom qab vuam.
Alloy 31 MTC peb tau xa tawm rau koj siv
Phosphoric Acid Plant Failure Case:
Ib qho teeb meem tshwm sim hauv cov nroj tsuag tshuaj yog siv 316L nyob rau hauv 50% sulfuric acid ib puag ncig, ua rau kom nrawm nrawm. Hloov qhov no nrog Alloy 31 muab kev pab cuam lub neej nce ntawm 5x rau 10x, txo qhov ntev -cov nqi tu.
Phosphoric Acid Cog
Ib tsob nroj chiv keeb kwm siv 316L piping hauv ib chav tsev phosphoric acid concentration. Kev mob hnyav tshwm sim tom qab 18 lub hlis.
Lub kaw lus tau hloov kho mus rau Alloy 31 piping:
- Corrosion tus nqi txo qis heev
- Kev pab lub neej tshaj 10 xyoo
- Cov nqi kho mob txo qis dua 60%
Engineering Notes
Alloy Corrosion resistance nyob rau hauv siab -kub sulfuric acid, welding cov nyom (tiv thaiv kub tawg), thiab tus nqi- txiaj ntsim kev ncaj ncees vs. Nickel 200/201 los yog Hastelloy.
Corrosion Rate Test Data (Annual Corrosion Rate, mm/a) los ntawm Sulfuric Acid Concentration & High Temperature
| Sulfuric Acid Service Condition | Kub | Alloy 31 | Nickel 200/201 | Hastelloy C276 |
| 10% Dilute Sulfuric Acid (txo) | Boiling 100 degree | ＜0.03 | 0.8 ~ 1.2 (Qhov hnyav corrosion, ntshiab npib tsib xee tsis tiv taus oxidizing dilute acid) | ＜0.01 |
| 50% Medium Concentration Sulfuric Acid | 120 degree | 0.02~0.05 | ＞ 2.0 (Perforation-qib corrosion) | ＜0.01 |
| 90 ~ 98% Kub Concentrated Sulfuric Acid (Oxidizing) | 150 degree | 0.04~0.08 | ＞ 3.0 (ua tsis tiav) | 0.02~0.04 |
| Sulfuric Acid + 1~ 3% Chloride Ion Impurities (Feem ntau hauv Industrial Waste Acid) | 80 ~ 130 degree | ＜0.06 | Rapid pitting & perforation | ＜0.02 |
- Nickel 200/201 Kev txwv: Nickel ntshiab tsis muaj Cr lossis Mo, nws tsuas yog tsim rau siab -purity, txo sulfuric acid ntawm qhov kub thiab txias.
- Alloy 31 Qhov Zoo: 80℃txog 150℃-tshwj xeeb muaj kev lag luam-qib sulfuric acid uas muaj impurities xws li Cl⁻ thiab Fe³⁺- nws cov corrosion kuj yog deb tshaj ntawm cov ntshiab nickel, mus txog qhov ua tau zoo.npe c276;. Ntxiv mus, nws cov nqi qis dua li ntawm C276.
Life Cycle Cost Analysis
| Khoom siv | Tus nqi pib | Cia siab rau Kev Pabcuam Lub Neej |
| 316L | Tsawg | 2–5 Xyoo |
| 904L | Nruab nrab | 5–8 Xyoo |
| Alloy 31 | Nruab nrab-High | 10–20 Xyoo |
| Hastelloy C276 | Siab heev | 15–25 Xyoo |
Zhengzhou Huitong Pipeline Equipment Co., Ltd. Daim ntawv pov thawj:
✅ ISO 9001: 2015
✅ MTC 10204 3.1 3.2
✅ 100% PMI (Positive Material Identification)
✅ Ultrasonic Testing (Rau ASME VIII)
✅ Third-Kev Tshawb Fawb Kev Tshawb Fawb (SGS/BV/DNV/LR)
✅ NACE MR0175 / ISO 15156
FAQ:
A:Hom 2026 tus nqi sib txawv los ntawm$18–29/kg, nyob ntawm qhov loj me, qhov ntau, thiab kev tsim khoom.
A: Xaiv Alloy 31 thaum cov txheej txheem cuam tshuam nrog ntau dua ntawm sulfuric acid lossis ntau dua chloride ib puag ncig uas 904L tau ntsib pitting. Nws cov ntsiab lus Molybdenum siab dua muab tus nqi PREN zoo dua.
Q: Puas yog Alloy 31 ua rau muaj kev ntxhov siab corrosion tawg (SCC)?
A: Tsis yog, Alloy 31 muaj kev tiv thaiv zoo rau SCC, ua rau nws muaj kev ntseeg siab rau kev siv siab - kub qhov twg tus qauv austenitic stainless hlau yuav ua tsis tiav.
Q: Dab tsi yog cov khoom siv zoo tshaj plaws rau chloride - nplua nuj acidic ib puag ncig?
A: Rau huab cua acidic chloride ib puag ncig, Alloy 31 zoo heev. Txawm li cas los xij, yog tias ib puag ncig muaj qhov kub thiab txias heev thiab oxidative acids, koj yuav tsum tau nce mus rau ntau dua nickel alloys xws li C-276.
A:Rau ib puag ncig acidic chloride, Alloy 31 feem ntau muab kev tiv thaiv corrosion zoo dua thiab ua haujlwm ntev dua, txawm hais tias Duplex 2205 tseem pheej yig dua rau cov mob me me.
Q: Koj puas yog lub Hoobkas tsim khoom?
A: Yog. Factory xeem daim ntawv pov thawj yog xa nrog cov khoom.
Q: Kuv puas tuaj yeem muaj qee qhov qauv ua ntej xaj?
A: Yog lawm, tau kawg. kuaj dawb tab sis koj yuav tsum them tus xa khoom.
Q: Peb puas tuaj yeem tuaj xyuas koj lub tuam txhab?
A: Tau kawg. Peb zoo siab tau muaj koj nyob hauv Suav teb.
Q: Yam tsawg kawg nkaus Order Quantity yog dab tsi?
A: Tsis muaj MOQ.
Q: Cov nqe lus them nqi yog dab tsi?
A: T / T, L / C, Western Union, thiab lwm yam.
Q: Koj lub sijhawm xa khoom yog dab tsi?
A: Rau cov khoom lag luam, peb tuaj yeem xa cov khoom mus rau qhov chaw nres nkoj hauv 7 hnub tom qab tau txais koj cov nyiaj tso cia.
Rau lub sijhawm tsim khoom, nws feem ntau xav tau li 10 hnub - 35 hnub tom qab tau txais qhov tso nyiaj.
Q: Puas yog nws zoo rau kos kuv lub logo ntawm koj cov khoom?
A: Yog. OEM thiab ODM muaj rau peb.
Q: Peb Lub Tebchaws Exported
A: Indonesia, Is Nrias teb, Singapore, Malaysia, Iran, Russia, UAE, Chile, Nplog, Brazil, South Africa, thiab lwm yam
Hais txog Zhengzhou Huitong Pipeline Equipment Co., LTD.
HT PIPE yog ib tug zoo-paub stockist thiab exporter. Peb yog cov khoom siv stainless / carbon / npib tsib xee alloy khoom xa khoom nrog 15+ kev xa tawm. Peb tsis tsuas yog muab cov kav dej, phaj, puag ncig, tab sis kuj yog cov yeeb nkab fittings, flanges, thiab lwm yam. Hu rau peb kom paub ntau ntxiv thiab cov nqi dawb.
Author: Chloe Pu
5+ Xyoo ntawm Kev Tshaj Lij Tshaj Lij Tshaj Tawm hauv Stainless Hlau, Nickel Alloy & Carbon Steel Hlau Kev Lag Luam
Hloov tshiab kawg: Lub Rau Hli 3, 2026 (Lub Sijhawm Beijing)
Cim npe nrov:
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