AL6XN cevzaum hauv ib lub niche uas nyuaj rau tsis quav ntsej. Nws raug nqi ntau dua 316L, qee zaum peb mus rau plaub zaug ntxiv rau ib kilogram, tab sis nws ua haujlwm hauv chloride- thaj chaw nplua nuj nyob qhov twg 316L tsis muaj kev puas tsuaj loj. Tib lub sijhawm, nws ua haujlwm pheej yig dua li npib tsib xee-raws li alloys xws li C-276 lossis Alloy 625. HT PIPE yog ib qhostainless hlau al6xn 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.
PREN: Tus lej koj yuav tsum tau suav
Pitting Resistance Equivalent Number (PREN) muab qhov sib piv ceev rau koj qhov kev pabcuam chloride. Cov mis rau austenitic qib:
PREN=%Cr + 3.3 × %Mo + 16 × %N
Siv ib txwm nruab nrab - ntau yam kev sib xyaw:
| Alloy | Hom PREN | Seawater Service Temperature Limit |
|---|---|---|
| 316L | ~24 | Tsis pom zoo rau saum 25 degree |
| 904L | ~35 | Ambient seawater nkaus xwb |
| 254 SIB | ~43 | Zoo rau ~ 45 degree |
| AL 6 XN | ~47 | Zoo rau ~ 50-55 degree |
| Alloy 625 (Ni{1}}raws li) | ~50 | Kub seawater / acid kev pab |
| Alloy C-276 (Ni-raws li) | ~65 | Extreme: kub acid + chlorides |
Qhov PREN ntawm 47 tso AL6XN saum 254 SMO los ntawm kwv yees li 3-5 ntsiab lus. Hauv cov ntsiab lus siv tau, Critical Pitting Temperature (CPT) rau AL6XN hauv 10% FeCl₃ (ASTM G48 Txoj Kev A) nyob ib puag ncig 75 degree, thiab Critical Crevice Temperature (CCT) nyob ib ncig ntawm 50-60℃- ob qho tib si ntsuas siab tshaj 254 SMOPT's ~ 70℃C.
AL6XN Yeeb Nkab Cov Khoom Siv thiab Cov Qauv Tsim Khoom
Seamless vs. Welded - Thaum Txhua Qhov Kev Pom Zoo
AL6XN yeeb nkab yog tsim nyob rau hauv ob qho tib si seamless thiab welded cov ntaub ntawv, thiab kev xaiv tsis yog hais txog kev ntsuas siab. Nws yog hais txog daim ntawv thov, qhov loj me, thiab tus nqi.
Seamless AL6XN yeeb nkabyog tsim los rau ASTM B675 (welded) thiab ASTM B676 (seamless) rau raj / yeeb nkab khoom. Cov txheej txheem seamless - feem ntau txias pilgering los yog txias txias los ntawm extruded hollow - ua yeeb nkab uas tsis muaj longitudinal weld seam, uas tseem ceeb nyob rau hauv peb lub sij hawm:
- High - cov ntawv thov siabqhov twg cov weld seam yuav yog qhov chaw tsis muaj zog (ASME B31.3 piping hauv kev pabcuam refinery)
- Creviced geometryqhov twg cov hlaws hauv cov hlaws tuaj yeem ntes chlorides thiab pib crevice corrosion
- NACE MR0175 / ISO 15156 Kev pabcuam qaubqhov twg weld seam kev ncaj ncees raug tshuaj xyuas ntau dua
Seamless AL6XN yeeb nkab feem ntau muaj los ntawm 1/4 "(6.35mm) mus rau 8" (219.1mm) sab nraud txoj kab uas hla, nrog phab ntsa thicknesses ntawm Sch 5S mus rau Sch 80S thiab tshaj.
Welded AL6XN yeeb nkab(ASTM A249 rau tubing, ASTM A312 rau cov yeeb nkab, ASTM A358 rau txoj kab uas hla loj) yog qhov kev xaiv pheej yig dua rau qhov loj dua. Tshaj 8" nominal txoj kab uas hla, seamless AL6XN yuav nyuaj rau qhov chaw thiab txwv tsis pub kim - welded yeeb nkab siv phaj dov thiab longitudinally welded yog tus qauv mus kom ze. Rau qhov ntau thiab tsawg los ntawm 8" mus rau 24", welded AL6XN yeeb nkab nrog 100% radiography thiab kev daws annealing tom qab welding desalin feem ntau siv.
AL6XN vs. Alternative Alloys: Lub Tswv Yim Txiav Txim Siab
Koj muaj corrosive ib puag ncig. Koj xav tau cov yeeb nkab. Daim ntawv qhia tshwj xeeb hais tias "xav txog AL6XN lossis sib npaug." Nov yog yuav ua li cas txiav txim siab tiag tiag.
AL6XN vs . 254 SMO
Ob qho no yog cov qib uas feem ntau hloov tau. Ob leeg yog 6Mo super austenitics nrog cov txiaj ntsig PREN zoo sib xws. Qhov txawv:
AL6XN muaj ntau dua nickel(24% vs . 18%), uas muab me ntsis zoo dua kev ntxhov siab corrosion cracking tsis kam thiab ntau dua yield zog
254 SMO muaj ntau dua tooj liab(0.7% vs. 0.1%), uas pab hauv kev pabcuam sulfuric acid tab sis tuaj yeem ua rau muaj kev puas tsuaj rau cov chaw muaj tshuaj chloride
AL6XN muaj ~ 5-10% zog duathiab ASME pom zoo rau 800℃F (427 degree) vs . 254 SMO's 700℃F (371 degree)
254 SMO yog cov khoom lag luam dav davnyob rau hauv cov teb chaws Europe thiab muaj dav EN tus qauv kev pab cuam
AL6XN vs . 904L
904L yog super austenitic nrog 4.5% molybdenum - txhais tau tias tsawg dua AL6XN's 6.3%. Nws PREN ntawm ~ 35 yog txaus rau ambient seawater tab sis txaus ntshai nyob rau hauv sov chloride kev pab cuam . 904L nqi kwv yees li 60-70% ntawm AL6XN ib kilogram.
AL6XN vs. Nickel{2}}Based Alloys (C-276, Alloy 625)
Qhov no yog tus nqi -kev ua lag luam kev ua tau zoo- tawm lo lus nug. C-276 thiab Alloy 625 muab PREN qhov tseem ceeb ntawm 65 thiab 50 raws li - siab dua AL6XN's 47 - thiab lawv tswj txo cov kua qaub ib puag ncig uas AL6XN tsis tuaj yeem. Tab sis lawv raug nqi 2.5 mus rau 4 npaug ntau dua ib kilogram.
Cov ntaub ntawv ntsuam xyuas cov ntaub ntawv - Tsis yog Txhua Daim Ntawv Pov Thawj 3.1 yog sib npaug
Daim ntawv pov thawj EN 10204 Hom 3.1 yuav tsum yog los ntawm cov chaw tsim khoom tus neeg sawv cev soj ntsuam, tsis yog los ntawm lub tuam txhab lag luam lossis tus xa khoom. Hom 3.2 daim ntawv pov thawj suav nrog rau thib peb- lub koom haum tshuaj ntsuam xyuas (ywj siab ntawm ob lub chaw tsim khoom thiab cov neeg yuav khoom) thiab yuav tsum tau ua kom siab dua - pawg PED phom sij thiab ntau lub tuam txhab roj hauv Middle East lub teb chaws.
Dab tsi yuav tsum muaj nyob rau hauv daim ntawv pov thawj rauAL6XN cev:
- Kub naj npawb- traceable rau qhov qub yaj
- Tshuaj ntsuam xyuas- tag nrho cov ntsiab lus suav nrog nitrogen (ntau lub chaw sim hla nitrogen; hais rau nws)
- Mechanical zog- tensile zog (Ntau dua los yog sib npaug rau 690 MPa), yield zog (Ntau tshaj los yog sib npaug rau 310 MPa), elongation (Ntau tshaj los yog sib npaug rau 30%), hardness (Less tshaj los yog sib npaug rau 100 HRB)
- Intergranular corrosion test- rau ASTM A262 Xyaum E (Strauss test) lossis Xyaum C (Huey test)
- Pitting / crevice corrosion test- ASTM G48 Txoj Kev A lossis C, nrog CPT thiab CCT cov txiaj ntsig
- Solution anneal cov ntaub ntawv kho cua sov- kub (1110-1200 degree), tuav lub sij hawm, quench method
- Tsis yog -kev kuaj xyuas kev puas tsuaj- kuaj hydrostatic lossis pneumatic xeem, kuaj ultrasonic rau kev pabcuam tseem ceeb
