ASTM A387 Qib 5 Chav Kawm 1(feem ntau abbreviated li SA 387 Gr 5 Cl 1) yog ib tug siab -zoochromium{0}}molybdenum alloy hlauphaj. Nws yog feem ntau siv nyob rau hauv fabrication ntawm weldable boilers thiab siab hlab ntsha tsim rauKev pabcuam kub siab, xws li cov uas pom nyob rau hauv cov roj, roj, thiab petrochemical industries.
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A387 Gr.5 CL.1Tshuaj muaj pes tsawg leeg |
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Qib |
Cov ntsiab lus Max (%) |
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C |
Si |
Mn |
P |
S |
Cr |
Mo |
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A387 Gr.5 Cl.1 |
0.15 |
0.55 |
0.25-0.66 |
0.035 |
0.035 |
3.90-6.10 |
0.40-0.70 |
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Qib |
A387 Gr.5 CL.1Mechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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A387 Gr.5 Cl.1 |
mm |
Min Mpa |
Mpa |
Tsawg% |
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t Tsawg dua lossis sib npaug li 50 |
205 |
415-585 |
18 |
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50<> |
- |
- |
- |
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Cov txheej txheem ua haujlwm
Kev kho cua sov:
Cov txheej txheem kho cua sov yog ua tib zoo tswj kom zoo dua cov khoom siv microstructure. Nws feem ntau muaj xws li Normalizing ntawm qhov kub ntawm 900℃mus rau 950 degree, uas refines grain loj, tshem tawm qhov tsis xws luag thiab homogenizes tus qauv. Cov kauj ruam no yog ua raws li Tempering ntawm siab tshaj 675 degree, kev ua haujlwm tseem ceeb los txo cov kev ntxhov siab ntawm qhov qub, txhim kho ductility thiab toughness, thiab stabilize cov cuab yeej cuab tam uas yuav tsum tau siv rau Class 1 daim ntawv thov, kom ntseeg tau tias cov khoom tuaj yeem ua haujlwm hnyav.
Vuam raws tu qauv:
Vuam ntawm no chromium-molybdenum alloy xav tau nruj ua raws li ua ntej -welding thiab muab tub lim hlau yuav tsum. Preheating ntawm 150℃thiab 250℃yog qhov yuav tsum tau ua kom txo tau qhov kub thiab txias ntawm thaj tsam weld, txo qhov kev pheej hmoo ntawm kev kub ntxhov los ntawm kev txias sai. Lub caij no, qis- hydrogen muab tub lim hlau (piv txwv li, E8018-B6) tsuas yog siv los txo cov ntsiab lus hydrogen hauv qhov vuam, ntxiv tiv thaiv hydrogen-induced cracking thiab ua kom cov weld sib koom ua ke lub zog sib tw nrog cov khoom siv hauv paus.
Tshaj tawm -Kev kho cua sov (PWHT):
Kev ntxhov siab -relieving PWHT yog qhov tseem ceeb tom qab vuam, ua ntawm 700℃txog 760℃. Cov txheej txheem no ua tau zoo txo qhov seem vuam kev nyuaj siab, softens lub hardened Heat Afected Zone (HAZ), thiab txhim kho cov vuam sib koom ua ke lub toughness thiab corrosion kuj, zam tsis ntxov ntxov tsis ua hauj lwm nyob rau hauv lub siab thiab kub.
Ntug Conditioning:
Thermal txiav inevitably tsim ib txheej hardened ntawm npoo, uas impairs weld zoo thiab mechanical kev ua tau zoo. Yog li, tag nrho cov thermal txiav npoo yuav tsum tau ua kom huv si hauv av kom tshem tawm cov txheej txheem tawv tawv no, ua kom huv si, cov npoo npoo ua ntej vuam thiab lav lub suab fusion ntawm cov khoom siv hauv paus thiab muab tub lim hlau.
Daim ntawv thov
Kev lag luam Standard rau Heat-Intensive Service
Cov khoom no yog dav suav hais tias yog kev lag luam benchmark rau cov cuab yeej ua hauj lwm nyob rau hauv high-temperature ib puag ncig uas cov qauv kev ncaj ncees, thermal stability, thiab kuj mus creep, oxidation, thiab corrosion yog ib qho tseem ceeb. Nws muaj peev xwm khaws tau lub zog thiab toughness ntawm qhov kub thiab txias, ua ke nrog zoo weldability thiab fabricability, ua rau nws nyiam xaiv rau cov khoom tseem ceeb nyob rau hauv ntau yam sectors.
Petrochemical & Refining Applications
Nyob rau hauv petrochemical thiab refining chaw, nws yog dav siv nyob rau hauv siab hlab ntsha, tshav kub exchangers, thiab reactor hlab ntsha uas ua cov qaub crude roj, high-siab hydrogen, thiab lwm yam aggressive hydrocarbons. Cov ntawv thov no xav tau kev tiv thaiv hydrogen nres, sulfide kev ntxhov siab tawg, thiab thermal cycling, nrog rau kev ua raws li kev ruaj ntseg thiab cov hlab ntsha siab. Cov khoom siv kev ua tau zoo pab txo qis qis qis, txhim khu kev ntseeg tau ntawm kev ua haujlwm, thiab txhawb kev hloov pauv ntawm cov roj crude rau hauv cov khoom muaj txiaj ntsig.
Daim ntawv thov tsim hluav taws xob
Hauv kev tsim hluav taws xob, cov khoom siv yog ib qho tseem ceeb rau kev lag luam boilers, chav piping, thiab high-temperature ducting systems. Nws muab lub zog zoo heev thiab qaug zog tiv thaiv nyob rau hauv lub sijhawm ntev ntawm qhov kub thiab txias, ua kom muaj kev nyab xeeb thiab tsis tu ncua ntawm chav rau hluav taws xob tsim thiab cov txheej txheem kev lag luam. Nws cov kav ntev kuj tseem ua rau txo tus nqi kho thiab ua haujlwm ntev dua rau cov chaw tsim hluav taws xob tsim hluav taws xob.
Kev siv tshuaj ua haujlwm
Nyob rau hauv cov tshuaj ua cov nroj tsuag, nws yog ua hauj lwm nyob rau hauv cov hlab ntsha thiab cia systems tuav kub acidic media, corrosive chemicals, thiab reactive txheej txheem kwj. Cov khoom siv tiv thaiv oxidation, scaling, thiab tshuaj tua kab mob pab tswj cov hlab ntsha kev ncaj ncees, tiv thaiv kom tsis txhob xau, thiab xyuas kom ua raws li kev cai nruj ib puag ncig thiab kev nyab xeeb. Nws versatility tso cai rau nws siv nyob rau hauv ntau yam ntawm cov txheej txheem tshuaj, los ntawm acid ntau lawm mus rau tshwj xeeb chemical manufacturing.
Kev siv roj & roj
Rau kev lag luam roj thiab roj, cov khoom siv yog siv rau hauv cov roj cais tawm, cov txheej txheem ua haujlwm sab nrauv, thiab lwm yam khoom siv ua haujlwm hnyav hauv ntug dej hiav txwv thiab ntug dej hiav txwv. Nws yuav tsum tiv taus qhov kub thiab txias, corrosive kua, thiab mechanical stresses, thaum tseem ua tau raws li kev lag luam cov kev cai nruj rau kev ntseeg siab thiab kev nyab xeeb. Nws kev sib xyaw ua ke ntawm cov cua sov ua haujlwm thiab kev tiv thaiv corrosion ua rau nws zoo haum rau kev siv tseem ceeb hauv kev ua haujlwm sab saud thiab nruab nrab.
Qhov zoo
Creep Resistance:
Molybdenum ua kom cov hlau tsis tas yuav deform nyob rau hauv lub sij hawm ntev - kev ntxhov siab ntawm qhov kub thiab txias.
Oxidation Resistance:
5% Chromium muab kev tiv thaiv zoo tiv thaiv kev ntsuas hauv qhov chaw kub.
Kev tiv thaiv HTHA:
Tshwj xeeb resistant rau High -Tub kub Hydrogen Attack, ib tug tseem ceeb kev nyab xeeb feature rau refineries.
Superior Ductility:
Piv rau Chav Kawm 2, Chav Kawm 1 muaj kev cuam tshuam zoo dua thiab yooj yim dua rau txias- daim ntawv (yob lossis khoov).
Tus nqi -Ua tau zoo:
Muab kev ua haujlwm siab -tier ntawm tus nqi qis dua li cov hlau tsis muaj steel lossis npib tsib xee-raws li alloys.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
Dab tsi yog qhov sib txawv ntawm cov tshuaj muaj pes tsawg leeg ntawm A387 Qib 5 Chav Kawm 1 thiab A387 Qib 11 Chav Kawm 1?
Qib 11 Chav Kawm 1 muaj 1.00-1.50% chromium, thaum Qib 5 Chav Kawm 1 muaj 4.00-6.00% chromium, txhim kho qhov kev ua haujlwm siab tom kawg.
Dab tsi yog qhov sib txawv ntawm cov tshuaj muaj pes tsawg leeg ntawm A387 Qib 5 Chav Kawm 1 thiab A387 Qib 11 Chav Kawm 1?
Qib 11 Chav Kawm 1 muaj 1.00-1.50% chromium, thaum Qib 5 Chav Kawm 1 muaj 4.00-6.00% chromium, txhim kho qhov kev ua haujlwm siab tom kawg.
Qhov ductility ntawm A387 Qib 5 Chav Kawm 1 txawv li cas ntawm A516 Qib 70?
A516 Qib 70 muaj cov ductility siab dua (elongation Ntau dua lossis sib npaug li 21%) dua li A387 Qib 5 Chav Kawm 1 (Ntau dua lossis sib npaug li 18%), tab sis tom kawg yog ntau dua kub-resistant.
Dab tsi yog qhov txawv ntawm daim ntawv thov ntawm A387 Qib 5 Chav Kawm 1 ntawm A242 Hom 1?
Qib 5 Chav Kawm 1 yog rau siab - siab boilers thiab cov hlab ntsha, thaum A242 Hom 1 yog rau kev siv cov qauv, sib txawv hauv siab thiab temp kuj.
Cov txheej txheem kho cua sov ntawm A387 Qib 5 Chav Kawm 1 txawv ntawm A387 Qib 7 Chav Kawm 1 li cas?
oth xav tau normalizing thiab tempering, tab sis Qib 5 Chav Kawm 1's tempering tempering yog 620-705 degree, 20-30℃qis dua Qib 7 Class 1, yoog rau nws cov alloy piv.
Qhov ductility ntawm A387 Qib 5 Chav Kawm 1 txawv li cas ntawm A516 Qib 70?
A516 Qib 70 muaj cov ductility siab dua (elongation Ntau dua lossis sib npaug li 21%) dua li A387 Qib 5 Chav Kawm 1 (Ntau dua lossis sib npaug li 18%), tab sis tom kawg yog ntau dua kub-resistant.
Dab tsi yog qhov txawv ntawm daim ntawv thov ntawm A387 Qib 5 Chav Kawm 1 ntawm A242 Hom 1?
Qib 5 Chav Kawm 1 yog rau siab - siab boilers thiab cov hlab ntsha, thaum A242 Hom 1 yog rau kev siv cov qauv, sib txawv hauv siab thiab temp kuj.
Cov txheej txheem kho cua sov ntawm A387 Qib 5 Chav Kawm 1 txawv ntawm A387 Qib 7 Chav Kawm 1 li cas?
Ob leeg xav tau normalizing thiab tempering, tab sis Qib 5 Chav Kawm 1's tempering tempering yog 620-705 degree, 20-30℃qis dua Qib 7 Chav Kawm 1, yoog rau nws cov alloy piv.