Dab tsi yog Post-Weld Heat Treatment (PWHT) cov cai rau SA204 Qib C?
Tshaj tawm -Weld Heat Treatment (PWHT) rauSA204 Qib C(a 1/2Mo steel, P-Tsis yog. 4) feem ntau yuav tsum tuav ntawm1100∘F(593∘C) rau 1250∘F(677∘) rau yam tsawg kawg ntawm 1 teev ib nti (25mm) ntawm thickness, raws li ASME Tshooj VIII Div. 1 Table UCS-56. Yuav tsum tau PWHT feem ntau tshwm sim thaum nominal thickness tshaj 58ntiv tes (16 hli), txawm tias muaj kev zam raws li preheat thiab cov khoom specs.
ASME SA204 Qib C sawv cev rau kev xaiv engineering uas muaj zog rau cov cuab yeej siv siab uas yuav tsum muaj cov txiaj ntsig siab - rau - tensile piv nrog rau qhov kub thiab txias. Los ntawm kev siv lub hauv paus ferritic molybdenum tshuaj, qib no tswj nws cov neeg kho tshuab kev ncaj ncees nyob rau hauv thaj tsam ntawm 700℃F txog 1000℃F (370℃txog 540 degree), qhov twg cov qauv carbon steels yuav pib poob lawv cov load-cov kabmob muaj peev xwm. Nws yog "workhorse" rau hnyav-phab ntsa kev tsim kho, feem ntau muab nyob rau hauv cov xwm txheej zoo los xyuas kom meej cov txheej txheem ua kom zoo zoo uas tuaj yeem nqus tau cov thermal shocks thiab tiv thaiv kev pib tawg hauv kev xav tau petrochemical thiab chav{11}} tiam ib puag ncig.
Cov yam ntxwv tseem ceeb
Enhanced Load Capacity:Yam tsawg kawg yield zog ntawm295 MPa uatso cai rau siab tso cai rau kev ntxhov siab hauv cov lej tsim.
Creep-Rupture Strength:Kev muaj peev xwm zoo tshaj plaws los tiv thaiv kev ua haujlwm tsis ua haujlwm thaum lub sijhawm ua haujlwm siab - qhov kub thiab txias.
Microstructural Refinement:Feem ntau normalized kom ua tau zoo -cov qauv zoo rau kev txhim kho toughness.
Weldability Requirements:Haum rau fusion vuam, txawm hais tias nws yuav tsum tau preheating kom tsis txhob tawg.
Qib Qib
Specification ID:SA 204 gr. C.
UNS Classification: K12320.
P-Number:P-Tsis muaj 3 Pawg 2 (rau kev tsim nyog vuam).
Kev sib piv nrog ASME SA516 Qib 70
Alloy Hom:SA204 Qib C yog cov hlau alloy (Molybdenum), thaum SA516-70 yog carbon hlau.
Thermal Limit:SA204 Qib C yog tsim los rau siab kub; SA516 yog txwv rau qhov kub thiab txias.
Creep cwj pwm:SA204 tshwj xeeb yog kuaj rau kev nkag siab, uas tsis yog qhov tseem ceeb ntawm SA516.
Cov ntawv thov siv
Petrochemical Reactors:Hnyav- cov nkoj uas siv hauv kev ua cov hydrocarbon.
Heat Exchanger Plhaub:Cheebtsam raug thermal cycling tas li thiab siab sab hauv.
Fais fab Cog Piping:Cov ntsiab lus tseem ceeb ntawm lub taub hau thiab lub siab - cov kav dej siab.
Dab tsi kub tuaj yeem SA204 Qib C tiv taus?
SA204 Qib C tuaj yeem tswj qhov kub ntawm 450℃thiab 500℃(840℃F txog 930℃F). Nws yog tsim los rau kev siv nyob rau hauv siab - qhov kub thiab txias ib puag ncig, xws li chav boilers thiab siab hlab ntsha, uas nws tuav nws lub zog thiab kev ua tau zoo. Txawm li cas los xij, dhau qhov ntsuas kub no tuaj yeem ua rau txo cov khoom siv zog, ua rau nws tseem ceeb rau kev txiav txim siab qhov kub thiab txias thaum tsim lossis tswj cov cuab yeej ua los ntawm SA204 Qib C kom muaj kev nyab xeeb.
Tus nqi ntawm SA204 Qib C yog dab tsi?
Tus nqi ntawm SA204 Qib C yog feem ntau siab dua li cov qauv carbon steels vim nws cov ntsiab lus alloying, tshwj xeeb yog molybdenum, uas txhim kho nws qhov siab -kub kev ua haujlwm thiab corrosion kuj. Txawm li cas los xij, tus nqi ntxiv yog tsim nyog rau cov ntawv thov uas cov khoom siv lub zog, durability, thiab tsis kam oxidation yog qhov tseem ceeb. Nws qhov kev ua tau zoo hauv siab - kev ntxhov siab, siab - qhov kub thiab txias ua rau nws tus nqi - kev xaiv zoo hauv cov ntawv thov tseem ceeb.
Cov tshuaj muaj pes tsawg leeg ntawm SA204 Qib C yog dab tsi?
SA204 Qib C muaj qhov sib npaug ntawm cov pa roj carbon (0.10-0.20%), manganese (0.60-1.00%), silicon, chromium, thiab molybdenum (0.25-0.50%). Cov ntsiab lus alloying no txhim kho cov khoom siv lub zog, weldability, thiab corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias. Cov mol
ASME SA204 GR.C steel tshuaj muaj pes tsawg leeg (%) :
|
Kev sib xyaw |
Hom |
Thickness (hli) |
C |
|
C Tsawg dua lossis sib npaug |
Heatanalyse Productanalyse |
Tsawg dua los yog sib npaug li 25 |
0.18 |
|
＞25~50 |
0.21 |
||
|
＞50~100 |
0.23 |
||
|
＞100 |
0.25 |
||
|
Mn Tsawg dua lossis sib npaug |
Heatanalyse |
- |
0.90 |
|
Productanalyse |
- |
0.98 |
|
|
P Less dua los yog sib npaug rau ,S Less dua los yog sib npaug |
Heatanalyse |
- |
0.035 |
|
Productanalyse |
- |
0.035 |
|
|
Si |
Heatanalyse |
- |
0.15~0.40 |
|
Productanalyse |
- |
0.13~0.45 |
|
|
Mo |
Heatanalyse |
- |
0.45~0.60 |
|
Productanalyse |
- |
0.41~0.64 |
ASME SA204 GR.C hlau Mechanical Properties:
|
Qib |
Tensile zog [MPa] |
YieldStrengthmin, kis [MPa] |
Elongationin8in [200mm], min,% |
Elongationin2in [50mm], min,% |
|
SA 204 GrC |
65-85[450-585] |
37[255] |
19 |
23 |
1Dab tsi yog cov kev tshuaj xyuas uas siv rau SA204 Qib C?
Cov kev tshuaj ntsuam xyuas feem ntau rau SA204 Qib C suav nrog kev kuaj ultrasonic, X- kev tshuaj xyuas hluav taws xob, ntsuas tensile, thiab kev ntsuas cuam tshuam. Cov kev ntsuam xyuas no tau ua los xyuas kom meej tias cov khoom muaj kev ncaj ncees thiab kev ua haujlwm nyob rau hauv siab -siab thiab siab- qhov kub thiab txias. Tsis yog-kev kuaj kev puas tsuaj, xws li kev kuaj ultrasonic lossis radiographic, feem ntau yog siv los txheeb xyuas cov teeb meem sab hauv lossis cov kab nrib pleb, kom ntseeg tau tias cov khoom tuaj yeem tiv taus kev ntxhov siab ua haujlwm yam tsis ua haujlwm.
2 Lub zog tensile ntawm SA204 Qib C yog dab tsi?
SA204 Qib C muaj lub zog tensile ntawm ib ncig ntawm 415 MPa, uas yog haum rau siab - kev siv siab. Qib ntawm tensile lub zog no ua kom ntseeg tau tias cov khoom tuaj yeem tiv taus cov kev ntxhov siab los ntawm kev ntxhov siab hauv cov hlab ntsha thiab lwm yam tseem ceeb. Nws lub peev xwm los tswj nws cov qauv kev ncaj ncees nyob rau hauv ob qho tib si txhua yam thiab thermal kev nyuaj siab ua rau nws muaj kev ntseeg siab rau kev siv hauv kev lag luam uas kev nyab xeeb thiab kev ua tau zoo yog qhov tseem ceeb.
3 Lub peev xwm ua haujlwm txias ntawm SA204 Qib C yog dab tsi?
SA204 Qib C muaj peev xwm ua haujlwm txias txias, suav nrog kev tsim, khoov, thiab shaping, ua tsaug rau nws cov ductility thiab toughness. Txawm li cas los xij, nws yuav tsum tau ua tib zoo saib xyuas thaum lub caij txias, vim tias qhov deformation ntau dhau yuav ua rau cov khoom tawg, tshwj xeeb tshaj yog tias qhov kub thiab txias poob qis. Cov txheej txheem ua haujlwm txias yuav tsum tau ua nyob rau hauv cov kev txwv pom zoo kom tswj tau cov khoom ntawm cov qauv kev ncaj ncees thiab tsis txhob muaj kev cuam tshuam tsis zoo xws li nce brittleness lossis txo cov tawv nqaij.
4 Yuav tsum khaws cov khoom SA204 Qib C li cas?
Kev tshuaj xyuas tsis tu ncua yuav tsum tau ua los saib xyuas cov cim ntawm kev tawg, xeb, lossis kev ntxhov siab, tshwj xeeb tshaj yog nyob rau hauv siab - daim ntawv thov kub. Kev tiv thaiv kev saib xyuas, xws li ntxuav qhov chaw ntawm oxidation buildup thiab xyuas kom meej tias cov hlab ntsha siab los yog boilers nyob twj ywm tsis muaj qhov tsis xws luag, yog qhov tseem ceeb. Teem sijhawm kev saib xyuas pab kom ntseeg tau tias SA204 Qib C cov khoom txuas ntxiv ua kom ntseeg tau lub sijhawm, txo qhov kev pheej hmoo ntawm kev ua tsis tiav thiab txuas ntxiv lub neej kev pabcuam ntawm cov khoom siv tseem ceeb.
5 Yuav ua li cas SA204 Qib C piv rau SA516 Qib 70?
SA204 Qib C yog ib qho qis- alloy steel uas muaj molybdenum, uas muab siab tshaj - kub lub zog thiab oxidation kuj piv rau SA516 Qib 70, carbon steel. SA516 Qib 70 feem ntau yog siv nyob rau hauv qis kub thiab siab daim ntawv thov, thaum SA204 Qib C yog qhov nyiam rau siab dua - kub, siab - qhov chaw siab, xws li hauv boilers thiab siab hlab ntsha. Qhov ntxiv molybdenum hauv Qib C txhim kho nws cov kev ua tau zoo hauv cov xwm txheej tsis zoo.
6 Dab tsi yog SA204 Qib C?
ASME SA204 Qib C yog qhov qis- alloy steel feem ntau siv hauv siab - siab thiab siab - qhov kub thiab txias, xws li boilers thiab cov hlab ntsha siab. Nws muaj lub zog zoo dua thiab ua haujlwm rau oxidation, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov uas muaj cua sov siab. Cov khoom siv no muaj kev tiv thaiv zoo rau kev tawg thiab muab cov txheej txheem zoo heev thaum raug kub hnyiab, ua rau nws tsim nyog rau kev lag luam tseem ceeb hauv cov nroj tsuag hluav taws xob thiab refineries.
7 Txoj kev kho cua sov rau SA204 Qib C yog dab tsi?
SA204 Qib C feem ntau dhau los ntawm kev sib tsoo los txhim kho nws qhov hnyav thiab ua haujlwm tau zoo. Cov khoom yog rhuab mus rau qhov kub ntawm ib ncig ntawm 650℃mus rau 700℃thiab ces maj mam txias kom ntseeg tau tias ib tug uniform grain qauv. Cov txheej txheem no txhim kho cov khoom siv kho tshuab, xws li toughness, ua kom yooj yim rau fabricate thaum tseem ua rau nws tsis kam mus tawg nyob rau hauv siab - tej yam kev mob kev nyuaj siab, uas yog ib qho tseem ceeb rau kev siv nyob rau hauv lub siab hlab ntsha thiab boilers.
Yog tias koj muaj qhov yuav tsum tau ua rau ASME SA204 Qib C, peb txais tos koj nug. GNEE tuav cov khoom lag luam loj uas feem ntau siv cov qib siab zog steel rau koj xaiv.Rau cov ncauj lus kom ntxaws cov khoom siv, tshuaj muaj pes tsawg leeg, thiab cov ntaub ntawv kev, nrog rau cov qauv dawb, thov hu rau peb lub Hoobkas tam sim ntawd. Peb muab cov nqi sib tw, ruaj khov zoo, thiab kev pabcuam tshaj lij. Email: info@gneesteels.com
