SA691 Qib 9CR Chrome-Molybdenum Alloy Steel Boiler Pipe
Product Overview
SA691 Qib 9CR yog siab -chromium, molybdenum-alloyed steel yeeb nkab tsim raws li covASTM / ASME SA691specification rau hluav taws xob-fusion-welded (EFW) piping. Qib no muaj kwv yees li 9% chromium thiab 1% molybdenum, muabsuperior oxidation kuj, siab -kub lub zog, thiab corrosion kuj piv rau qis chromium qib. Nws yog tsim tshwj xeeb rau kev ua haujlwm siab heev -kub thiab siab - kev siv lub zog hauv kev tsim hluav taws xob thiab kev lag luam petrochemical.
Cov ntawv thov tseem ceeb
Supercritical & Ultra-Supercritical Power Plants:Cov kab tseem ceeb, cov kab kub reheat, thiab superheater tubing
Petrochemical Kev Ua Haujlwm:Siab -kub reactor effluent kav, pyrolysis rauv tubes
Refinery Heaters:Rhaub raj rau siab -kev pab kub
Heat Recovery Steam Generators (HRSG):Siab - ntu siab
Advanced Thermal Power Systemsyuav tsum tau txhim kho oxidation tsis kam
SA691 9CR Chemical Composition & Mechanical Properties Table
| Qeb | Khoom / Khoom | Specification / Tus nqi |
|---|---|---|
| Standard & Qib | Standard Designation | ASTM / ASME SA691 |
| Qib | 9 CR ua(Sib npaug rau ASTM A335 P9) | |
| Tshuaj muaj pes tsawg leeg | Cov pa roj carbon (C) | 0.15% max |
| Manganese (Mn) | 0.30 - 0.60% | |
| Phosphorus (P) | 0.025% max | |
| Sulfur (S) | 0.025% max | |
| Silicon (Si) | 0.25 - 1.00% | |
| Chromium (Cr) | 8.00 - 10.00% | |
| Molybdenum (hli) | 0.90 - 1.10% | |
| Mechanical Properties | Tensile zog, min | 415 MPa (60,000 psi) |
| Yield zog, min | 205 MPa (30,000 psi) | |
| Elongation, min | Ntau dua lossis sib npaug li 20% (hauv 2 nti / 50mm) | |
| Hardness, max | 192 HBW (Brinell) | |
| Kev kho cua sov | Qhov xwm txheej | Normalizing thiab tempering Normalizing: 1040-1120℃(1900-2050℃F) Tempering: Ntau dua lossis sib npaug rau 730℃(Ntau dua lossis sib npaug rau 1350℃F) |
| Kev tsim khoom | Hom | Hluav taws xob Fusion Welded (EFW)nrog kev kho cua sov tag nrho tom qab vuam |
Temperature Resistance & Performance Data
| Khoom | Tus nqi / Ntau | Lus hais |
|---|---|---|
| Qhov siab tshaj plaws uas tau pom zoo rau kev pabcuam kub | 650℃(1200℃F) | Rau kev pabcuam tsis tu ncua |
| Oxidation Resistance txwv | Mus txog700℃(1290℃F) | Nyob rau hauv chav tsev / huab cua ib puag ncig |
| Creep zog | 34 MPa (4,930 psi)ntawm 600℃rau 100,000 teev | Yam tsawg kawg nkaus tus nqi |
| Thermal Expansion Coefficient | 12.2 × 10⁻⁶ /℃(20-600 degree) | Zoo ib yam li lwm yam Cr-Mo steels |
| Thermal conductivity | 26.0 W / m·K ntawm 500 degree |
Cov yam ntxwv tseem ceeb & Kev txiav txim siab
Txhim kho Oxidation Resistance:9% chromium cov ntsiab lus muab kev ua haujlwm zoo dua rau chav oxidation thiab scaling piv rau 5CR thiab qib qis, ua rau nws zoo tagnrho rau cov chaw tsim hluav taws xob ua haujlwm ntawm qhov kub siab dua.
Siab -Tsub Muaj Zog:Muab pov thawj zoo heev creep rupture zog thiab microstructural stability ntawm qhov kub txog li 650℃(1200℃F), tso cai rau nyias phab ntsa tsim thiab txhim kho efficiency.
Welding & Fabrication Considerations:
Yuav tsum tau preheating (feem ntau 200-300℃/ 400-570℃F) thiab tom qab vuam kub kho (PWHT) ntawm 730-760℃(1350-1400℃F)
Matching los yog overmatching muab tub lim hlau (xws li, E90xx-B9 rau SMAW) yuav tsum tau siv
Cov ntsuas cua txias yog qhov tseem ceeb los tiv thaiv kev tawg
Microstructural Stability:Cov muaj pes tsawg leeg yog tsim los txo qhov tsim ntawm cov theem kev puas tsuaj (xws li sigma theem) thaum lub sij hawm ntev - lub sij hawm siab - kub raug.
Quality Assurance Requirements:
Tsis yog-Kev kuaj kev puas tsuaj:100% radiographic (RT) los yog ultrasonic (UT) kuaj ntawm welds
Kev kuaj Hardness:Yuav tsum tau hla cov vuam (lub hauv paus hlau, HAZ, thiab vuam hlau)
Kev Ntsuas Hydrostatic:Yuav tsum tau ua raws li specifications
Advanced Testing:Feem ntau yuav tsum tau kuaj ntxiv creep rau cov ntawv thov tseem ceeb
Standards & Specifications Ua raws li:
ASME Boiler thiab Pressure Vessel Code, Tshooj I & Tshooj VIII
ASME B31.1 Fais Fab Piping
Cov qauv thoob ntiaj teb suav nrog EN 10216-2 thiab DIN 17175
Design & Selection Notes:
SA691 9CR feem ntau teev rauUSC (Ultra-Supercritical) fais fab nroj tsuagqhov twg chav kub tshaj 600 degree
Kev tsim kho ntawm SA691 muab kev lag luam zoo dua seamless A335 P9 rau qhov loj dua
Kev xaiv cov khoom yuav tsum xav txog ob qho tib si kub thiab siab xav tau, nrog rau ib puag ncig corrosion
Kev txheeb xyuas tus nqi ntawm lub neej feem ntau nyiam 9CR tshaj cov qib qis rau cov ntawv thov siab dua 580℃vim txo qis oxidation thiab txuas ntxiv kev pab cuam lub neej
Kev yuav khoom:
Certified Material Test Reports (CMTR) nrog tag nrho traceability
Thib peb-kev tshuaj ntsuam xyuas yog feem ntau teev rau cov ntawv thov tseem ceeb
Cov kev xav tau ntxiv (S1-S6) ntawm SA691 tuaj yeem raug hu ua raws li kev thov kev thuam
Tsis lees paub:Cov ntaub ntawv muab yog rau siv siv. Cov kws tsim qauv thiab cov kws tsim qauv yuav tsum sab laj txog cov ntawv tshaj tawm tshiab ntawm ASTM / ASME SA691 specification, cov lej siv tau (ASME B31.1, thiab lwm yam), thiab qhov project- cov kev cai tshwj xeeb rau kev xaiv cov khoom kawg thiab kev tsim nyog.
