Dab tsi yog qhov txawv ntawm ASME SA515 Qib 70 thiab ASME SA516 Qib 70?
Thawj qhov sib txawv ntawmASME SA515 Qib 70thiab ASME SA516 Qib 70yog lawv qhov kev pabcuam kub thiab cov qauv nplej: SA515 yog tsim los rau siab dua -kev pabcuam kub uas siv cov ntxhib- cov qauv nplej, thaum SA516 yog tsim los rau nruab nrab-rau- qis- qhov kub thiab txias kev pabcuam siv qhov zoo- cov qauv nplej txhawm rau ua kom muaj zog tshaj plaws. Thaum lawv muaj zog tensile zoo sib xws (485--620 MPa), SA515 muaj kev nkag siab zoo dua ntawm qhov kub thiab txias, whereas SA516 zoo dua nyob rau hauv qis - qhov kub thiab txias, qhov chaw tsis zoo.
ASME SA515 Qib 70 yog qhov siab - lub zog carbon steel phaj tshwj xeeb feem ntau tsim los rau nruab nrab thiab siab dua - kev pabcuam kub hauv boilers thiab lwm cov hlab ntsha siab. Nws yog tus cwj pwm los ntawm nws cov ntxhib- cov qauv nplej, uas yog txhob txwm khaws cia thaum lub sijhawm tsim khoom los muab kev nkag siab zoo dua thiab lub zog ntawm qhov kub siab piv rau cov hlau zoo -grained steels. Qib 70 yog qib uas muaj zog tshaj plaws nyob rau hauv SA515 specification, muab lub zog tensile yam tsawg kawg nkaus ntawm 70 ksi (485 MPa). Nws yog cov khoom siv tseem ceeb hauv chav ua haujlwm - tiam kev lag luam, qhov twg cov khoom yuav tsum tiv taus ntev ntev ntawm cov cua sov yam tsis muaj qhov cuam tshuam loj heev los yog "ceep" deformation.
Cov yam ntxwv tseem ceeb
Coarse-Kev xyaum ua qoob loo:Kev mob siab rau tsim kom muaj cov nplej loj dua, uas txhim kho lub sijhawm ntev - lub sijhawm thauj khoom - muaj peev xwm ntawm qhov kub thiab txias.
Enhanced Creep Resistance:Lub peev xwm zoo tshaj plaws los tiv thaiv qeeb deformation nyob rau hauv qhov kev ntxhov siab tas li hauv qhov chaw kub.
Cov ntsiab lus carbon siab:Cov pa roj carbon ntau dua ua rau nws lub zog tensile zoo dua thiab tawm los.
Predictable Thermal Expansion:Txhim kho qhov ruaj khov thaum lub sij hawm thermal cycling hauv boiler ua haujlwm.
Qib Qib
Standard ID:ASME SA515.
Qib tshwj xeeb:Qib 70.
Khoom siv:Coarse-Grained Carbon Steel rau siab-Temp Service.
Kev sib piv nrog ASME SA516 Qib 70
Grain Structure:SA515 yog ntxhib-grained rau siab- kub zog; SA516 yog zoo-grained rau qis-temp toughness.
Impact Testing:SA516 feem ntau yog Charpy V-notch kuaj rau kev pabcuam txias; SA515 tsis tshua muaj kev sim rau qhov cuam tshuam vim nws yog nkig ntawm qhov kub thiab txias.
Kev Pabcuam Ib puag ncig:SA515 yog xaiv rau boilers; SA516 yog xaiv rau ambient lossis tub yees tso tsheb hlau luam.
Cov ntawv thov siv
Boiler Steam Drums:Lub hauv paus pressurized hlab ntsha rau sau chav nyob rau hauv lub fais fab nroj tsuag.
Heat Exchanger Plhaub:Outer casings rau thermal hloov khoom siv nyob rau hauv refineries.
Lub hardness ntawm ASME SA515 Qib 70 yog dab tsi?
Lub hardness ntawm ASME SA515 Qib 70 feem ntau nyob ntawm 139 HB txog 190 HB, nyob ntawm seb cov khoom siv kho cua sov. Qib hardness no yog qhov zoo tagnrho rau kev siv cov hlab ntsha siab, vim nws muab qhov sib npaug ntawm lub zog, ductility, thiab cuam tshuam tsis kam. Cov khoom siv muaj zog txaus los tiv thaiv kev kub ntxhov thaum tswj xyuas qhov tsim nyog ductility los tiv thaiv kev tawg thaum muaj kev ntxhov siab.
Dab tsi yog cov thickness txwv ntawm ASME SA515 Qib 70?
ASME SA515 Qib 70 muaj nyob rau hauv cov tuab xws li 3/16 nti (4.8 mm) txog 1 1/2 nti (38 mm) rau kev siv lub nkoj siab. Cov khoom siv feem ntau yog siv rau hauv cov seem uas muaj zog tensile siab thiab zoo weldability yuav tsum tau. Rau cov phaj tuab, cov kev xav tau ntxiv rau kev kho cua sov thiab cov txheej txheem vuam yog tsim nyog los xyuas kom meej tias cov khoom ua tau zoo nyob rau hauv kev ntxhov siab thiab kub.
Dab tsi yog qhov qaug zog tiv thaiv ntawm ASME SA515 Qib 70?
ASME SA515 Qib 70 muaj kev qaug zog zoo rau feem ntau cov kev siv hauv cov hlab ntsha thiab cov boilers, qhov uas nws raug rau cyclic loading. Cov khoom siv lub zog tensile thiab zoo weldability pab nws tiv thaiv kev qaug zog tsis ua hauj lwm nyob rau hauv nruab nrab siab - kev ntxhov siab. Txawm li cas los xij, rau cov ntawv thov tseem ceeb uas qhov kev qaug zog ua haujlwm yog qhov kev txhawj xeeb tseem ceeb, siab dua - cov ntaub ntawv muaj zog lossis cov hlau tshwj xeeb hlau yuav muab kev ua tau zoo dua thiab siv tau ntev nyob rau hauv qhov hnyav hnyav.
Kev xav tau tshuaj
| Cov ntsiab lus % | TIAB SA 515 Gr 70 (Qib 485) |
|---|---|
| Cov pa roj carbon, max | |
| 1 nti (25 mm) thiab qis dua | 0.31 |
| Tshaj 1 mus rau 2 nyob rau hauv. (25 mus rau 50 mm), incl | 0.33 |
| Tshaj 2 mus rau 4 nti (50 mus rau 100 mm), incl | 0.35 |
| Tshaj 4 mus rau 8 nyob rau hauv. (100 mus rau 200 mm), incl | 0.35 |
| Tshaj 8 nti (200mm) | 0.35 |
| Manganese, max | |
| Kev ntsuas kub | 1.20 |
| Kev tshuaj xyuas cov khoom | 1.30 |
| Phosphorus, max | 0.035 |
| Sulfur, max | 0.04 |
| Silicon | |
| Kev ntsuas kub | 0.15-0.40 |
| Kev tshuaj xyuas cov khoom | 0.13-0.45 |
Tensile Requirements
| TIAB SA 515 Gr 70 (Qib 485) |
|
|---|---|
| Tensile zog, ksi (MP) | 70-90(485-620) |
| Yield zog, min. KSI (MP) | 38(260) |
| Elongation hauv 8 nti (200 mm), min, % | 17 |
| Elongation hauv 2 nti (50 mm), min, % | 21 |
1 ASME SA515 Qib 70 yog dab tsi?
ASME SA515 Qib 70 yog cov khoom siv carbon steel siv rau kev tsim cov hlab ntsha thiab boilers. Nws muaj lub zog tensile siab thiab zoo weldability, ua rau nws haum rau siab - kub thiab siab - ib puag ncig siab. Feem ntau siv rau hauv cov chaw tsim hluav taws xob thiab kev ua tshuaj, Qib 70 muaj lub zog, tawv, thiab tsis kam tiv thaiv thermal thiab mechanical stresses, ua kom muaj kev ruaj khov hauv kev siv tseem ceeb.
2 Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm ASME SA515 Qib 70?
Cov tshuaj muaj pes tsawg leeg ntawm ASME SA515 Qib 70 muaj xws li carbon (0.18–0.24%), manganese (0.60–1.00%), silicon (0.13–0.45%), sulfur (0.035% max), phosphorus (0.035% max), thiab cov kab nrib pleb ntawm chromium. Qhov kev sib xyaw ua ke ntawm cov ntsiab lus no txhim kho cov hlau lub zog, ductility, thiab tiv thaiv oxidation, ua rau nws tsim nyog rau kev siv kub, xws li hauv boilers thiab cov hlab ntsha siab.
3 Dab tsi yog qhov kub siab tshaj plaws uas ASME SA515 Qib 70 tuaj yeem tiv taus?
ASME SA515 Qib 70 tuaj yeem tiv taus kub txog 650℃F (343 degree) rau kev pabcuam txuas ntxiv. Nws yog qhov zoo tagnrho rau siab - daim ntawv thov kub qhov twg cov khoom yuav tsum tswj nws cov khoom siv hluav taws xob hauv qab cua sov. Txawm li cas los xij, qhov ntev ntawm qhov kub siab tshaj qhov kev txwv no tuaj yeem txo cov khoom siv zog. Nws yog ib qho tseem ceeb rau kev khiav lag luam nyob rau hauv qhov ntsuas kub tau pom zoo los xyuas kom meej cov hlau ntev - lub sij hawm kev ua tau zoo nyob rau hauv kev siv lub nkoj siab.
4 Dab tsi yog qhov cuam tshuam ntawm ASME SA515 Qib 70?
ASME SA515 Qib 70 nthuav tawm cov kev cuam tshuam zoo, ua rau nws tsim nyog rau cov ntawv thov uas muaj kev kub siab thiab kub. Cov ntaub ntawv tuav cov tawv tawv ntawm qhov kub siab, uas pab tiv thaiv kev tawg tawg. Txawm li cas los xij, rau qhov tsis tshua muaj siab tshaj - qhov kub thiab txias, cov ntaub ntawv nrog kev txhim kho qis - qhov kub thiab txias, xws li SA537, tej zaum yuav tsim nyog dua, vim SA515 Qib 70 tsis yog tsim los rau cov mob cryogenic.
5 Dab tsi yog cov ntawv thov tseem ceeb ntawm ASME SA515 Qib 70?
ASME SA515 Qib 70 feem ntau yog siv rau hauv kev tsim cov hlab ntsha siab, cov khoom siv hluav taws xob, thiab cov boilers uas ua haujlwm ntawm qhov kub thiab txias. Nws yog feem ntau siv hauv kev lag luam xws li kev tsim hluav taws xob, petrochemical, thiab roj thiab roj. Nws lub zog siab thiab zoo weldability ua rau nws zoo tagnrho rau cov ntawv thov tseem ceeb uas cov khoom xav tau los tiv thaiv qhov kub siab yam tsis muaj kev cuam tshuam kev ua haujlwm.
6 Dab tsi yog cov khoom siv kho tshuab ntawm ASME SA515 Qib 70?
ASME SA515 Qib 70 muaj lub zog tensile ntau ntawm 485-620 MPa thiab lub zog tawm ntawm kwv yees li 205 MPa. Nws kuj muaj qhov zoo elongation (kwv yees li 20%) thiab cuam tshuam tsis kam, uas ua rau nws haum rau siab - ib puag ncig siab. Cov khoom no tso cai rau cov hlau ua kom ntseeg tau hauv cov ntawv thov uas muaj kev ntxhov siab thiab kub siab, xws li hauv cov hlab ntsha, cov khoom siv hluav taws xob, thiab cov boilers.
7 Lub peev xwm vuam ntawm ASME SA515 Qib 70 yog dab tsi?
ASME SA515 Qib 70 muaj qhov zoo weldability, uas ua rau nws zoo tagnrho rau siv nyob rau hauv fabricating siab hlab ntsha, tshav kub exchangers, thiab boilers. Preheating tej zaum yuav tsim nyog rau cov seem tuab los tiv thaiv kev tawg, thiab tom qab -weld kev kho cua sov feem ntau pom zoo kom txo qis kev ntxhov siab thiab txhim kho cov khoom siv kho tshuab. Tsawg-hydrogen electrodes feem ntau yog siv los txo qhov kev pheej hmoo ntawm hydrogen-induced cracking thaum lub vuam txheej txheem.
Tiv tauj peb ntawm info@gneesteels.com rau tus nqi, kev txhawb nqa, lossis kev daws teeb meem. Peb yeej ib txwm npaj los txhawb koj qhov project.
