ASME SA 517 Qib B yog dab tsi?
ASME SA 517 Qib Byogsiab -lub zog, quenched thiab tempered alloy steel phaj feem ntau yog siv rau welded siab hlab ntsha thiab cia tso tsheb hlau luam. Nws nta lub zog qis kawg nkaus ntawm 100 ksi (690 MPa) rau thicknesses Tsawg dua los yog sib npaug rau 2.5ntiv tes, muab lub zog tensile zoo heev (115-135 tsi) thiab, feem ntau, kev ua tau zoo nyob rau hauv qis -kub, subzero daim ntawv thov.
ASME SA517 Qib B yog qhov siab -lub zog, quenched thiab tempered (Q&T) alloy steel phaj tshwj xeeb tsim los siv rau hauv cov welded boilers thiab lwm cov hlab ntsha siab. Tsis zoo li SA516 series, uas tso siab rau carbon-manganese chemistry, SA517 Gr. B suav nrog cov ntsiab lus alloying xws li Boron, Chromium, thiab Molybdenum kom ua tiav qhov siab tensile thiab tawm los muaj zog. Nws yog tsim los rau cov ntawv thov uas txo qhov hnyav ntawm lub nkoj yog qhov tseem ceeb, lossis qhov chaw sab hauv siab heev uas cov qauv carbon steels yuav xav tau cov phab ntsa tuab.
Cov yam ntxwv tseem ceeb
Extreme Yield Strength:Muab cov txiaj ntsig yam tsawg kawg nkaus ntawm 100 ksi, ze li peb npaug ntawm cov qauv carbon steel.
Quenched & Tempered State:Muab xa tuaj rau hauv qhov cua sov- kho mob kom ntseeg tau tias cov qauv martensitic zoo.
Qhov hnyav Efficiency:Lub zog siab - rau - qhov hnyav piv tso cai rau cov hlab ntsha nyias nyias.
Boron- Txhim kho:Siv cov kab ntau ntawm boron los txhim kho hardenability hla lub phaj thickness.
Qib Qib
"SA":"S" sawv cev rau Tshooj II (Cov Khoom Siv) ntawm ASME Code. "A" qhia tias nws yog cov khoom siv Ferrous (hlau-raws li).
"517":Qhov no yog cov ntaub ntawv tshwj xeeb rau "Pressure Vessel Plate, Alloy Steel, High-Strength, Quenched and Tempered."
"Qib B":Qhov no qhia txog cov tshuaj muaj pes tsawg leeg thiab thickness ntau. Qib B yog tshwj xeeb alloyed nrog Chromium, Molybdenum, thiab Boron thiab feem ntau yog npaj rau daim hlau mus txog 1.25 nti (32 hli) tuab.
Kev sib piv (vs. SA516 Qib 70)
Qib Siab:SA 517 gr. B yog ze li ob npaug ntawm qhov muaj zog ntawm qhov nro li SA516 Gr. 70.
Kev kho cua sov:SA516 feem ntau normalized; SIB 517yuav tsumyuav quenched thiab tempered.
Alloying:SA516 yog carbon-manganese, whereas SA517 yog qis- alloy steel.
Vuam nyuaj:SA517 yuav tsum tau ua kom muaj cua sov ntau dua- tswj cov tswv yim los tswj cov khoom Q&T.
Cov ntawv thov siv
LPG Thauj Tankers:Tshaj - lub - txoj kev trailers uas txo qhov hnyav nce load.
Hydro-Turbine Penstocks:Siab- cov kav dej hauv lub taub dej hauv cov chaw tsim hluav taws xob.
Deep-Hiav txwv Submersibles:Lub siab hulls rau underwater tshawb fawb nkoj.
Siab -Kev Cia Siab:Nyob ruaj ruaj tanks rau compressed industrial gases.
Puas yog ASME SA517 Qib B weldable?
Yog lawm, ASME SA517 Qib B yog vuam, tab sis vuam yuav tsum tau ua nrog cov txheej txheem tsim nyog thiab kev saib xyuas vim nws lub zog siab. Preheating tej zaum yuav xav tau rau cov seem tuab, thiab tom qab-weld heat treatment (PWHT) feem ntau yog tsim nyog los txo cov kev ntxhov siab uas seem thiab xyuas kom cov welded pob qij txha tswj cov khoom siv tshuab. Cov ntaub ntawv muab tub lim kom zoo yuav tsum raug xaiv kom haum rau cov khoom siv hauv paus.
Dab tsi yog manganese cov ntsiab lus hauv ASME SA517 Qib B?
Cov ntsiab lus manganese hauv ASME SA517 Qib B feem ntau yog li ntawm 0.70% txog 1.25%. Manganese plays lub luag haujlwm tseem ceeb hauv kev txhim kho cov hlau lub zog, toughness, thiab hardness. Nws kuj tseem txhim kho cov khoom muaj peev xwm tiv taus qhov kub thiab txias, ua rau nws zoo tagnrho rau siv hauv cov hlab ntsha siab, cov khoom siv hluav taws xob, thiab lwm yam kev siv siab - kub, siab - kev siv siab.
Dab tsi yog qhov muaj pes tsawg leeg ntawm carbon hauv ASME SA517 Qib B?
Cov ntsiab lus carbon ntawm ASME SA517 Qib B feem ntau yog li ntawm 0.18% txog 0.21%. Cov ntsiab lus ntawm cov pa roj carbon monoxide no pab txhawb rau cov khoom siv lub zog thiab hardness thaum tuav cov weldability zoo. Cov pa roj carbon kuj tseem ua lub luag haujlwm tseem ceeb hauv cov khoom siv tag nrho toughness thiab tsis kam mus rau qhov kub thiab txias, kom ntseeg tau tias cov hlau ua tau zoo thaum muaj kev ntxhov siab thiab siab.
Mechanical Properties
|
Qib |
Thickness |
0.2% YS (ksi) |
UTS (ksi) |
Elongation hauv 2 "1) |
Kev txo qis hauv cheeb tsam rau cov qauv duab plaub2) |
Kev txo qis hauv cheeb tsam rau cov qauv puag ncig3) |
|---|---|---|---|---|---|---|
|
B |
4.78 - 31.75 |
100 |
115 - 135 |
16 |
35 |
45 |
Chemical Composition (dawb tsom xam)
|
C |
Mn |
P |
S |
Si |
Cr |
Mo |
V |
Ti |
B |
|---|---|---|---|---|---|---|---|---|---|
|
0.15 - 0.21 |
0.70 - 1.00 |
0.025 |
0.008 1) |
0.15 - 0.35 |
0.40 - 0.65 |
0.15 - 0.25 |
0.03 - 0.08 |
0.01 - 0.04 |
0.0005 - 0.005 |
1. Cov tshuaj muaj pes tsawg leeg ntawm ASME SA517 Qib B yog dab tsi?
Cov tshuaj muaj pes tsawg leeg ntawm ASME SA517 Qib B suav nrog:, Carbon (C): 0.18–0.21%, Manganese (Mn): 0.70–1.25%, Phosphorus (P): Tsawg dua lossis sib npaug li 0.035%. Sulfur (S): Tsawg dua lossis sib npaug rau 0.035%.Silicon (Si. steel lub zog siab, toughness, thiab weldability, ua rau nws haum rau siab - kev siv siab nyob rau hauv kev lag luam uas lub zog thiab durability yog ib qho tseem ceeb.
2. Dab tsi yog cov ntawv thov ntawm ASME SA517 Qib B?
ASME SA517 Qib B feem ntau yog siv rau hauv kev tsim cov hlab ntsha siab, boilers, thiab siab -cov ntaub ntawv siv lub zog. Nws lub zog tensile zoo heev thiab tsis kam mus rau qhov kub thiab txias ua rau nws tsim nyog rau ib puag ncig tseem ceeb hauv kev lag luam xws li kev tsim hluav taws xob, petrochemical, thiab kev ua tshuaj lom neeg. Cov khoom siv tshwj xeeb yog qhov tseem ceeb hauv cov hlab ntsha siab uas yuav tsum tiv taus kev kub ntxhov thiab kev ua haujlwm siab heev.
3. Lub zog tensile ntawm ASME SA517 Qib B yog dab tsi?
Lub zog tensile ntawm ASME SA517 Qib B feem ntau yog li ntawm 85 ksi txog 100 ksi (585-690 MPa). Lub zog tensile siab no ua kom cov khoom muaj peev xwm tiv taus kev ntxhov siab thiab siab, ua rau nws zoo tagnrho rau cov hlab ntsha siab, boilers, thiab lwm yam kev siv uas yuav tsum tau muaj zog tshwj xeeb thiab tsis kam rau cov khoom siv zog.
4. Dab tsi yog sulfur ntsiab lus hauv ASME SA517 Qib B?
Cov ntsiab lus sulfur hauv ASME SA517 Qib B raug txwv rau qhov siab tshaj plaws ntawm 0.035%. Cov ntsiab lus tsis tshua muaj leej faj yog qhov tseem ceeb hauv kev tiv thaiv kev tsim cov sulfide inclusions, uas tuaj yeem ua rau cov khoom tsis muaj zog thiab ua rau nws yooj yim dua rau kev tawg, tshwj xeeb tshaj yog thaum vuam. Qhov no pab ua kom cov khoom muaj zog thiab ua haujlwm ntev, tshwj xeeb tshaj yog nyob rau hauv siab - kev siv siab.
5. Dab tsi yog qhov kev xeem cuam tshuam rau ASME SA517 Qib B?
ASME SA517 Qib B yuav tsum muaj kev ntsuas cuam tshuam los xyuas kom muaj zog ntawm qhov kub thiab txias. Feem ntau, qhov kev ntsuam xyuas cuam tshuam tau ua tiav ntawm 0℃F (-18 degree) kom ntseeg tau tias cov hlau tuaj yeem nqus tau lub zog yam tsis muaj kev tawg. Qhov xav tau lub zog nqus yog feem ntau 20 ft-lbs (27 J) yam tsawg kawg nkaus. Qhov no ua kom cov khoom muaj peev xwm tswj tau nws cov qauv kev ncaj ncees txawm tias nyob hauv qhov chaw txias, txo qhov kev pheej hmoo ntawm nkig tawg.
6. Lub zog tawm los ntawm ASME SA517 Qib B yog dab tsi?
Lub zog tawm los ntawm ASME SA517 Qib B yog feem ntau 70 ksi (485 MPa) ntawm chav tsev kub. Lub zog ua haujlwm siab no ua kom cov khoom tuaj yeem tiv taus deformation thiab tsis ua haujlwm nyob rau hauv siab - siab, ua rau nws tsim nyog siv rau hauv kev tsim cov hlab ntsha siab, lub tank cia, thiab lwm yam siab - kev siv kev ntxhov siab hauv cov roj thiab roj, lub zog, thiab tshuaj lom neeg kev lag luam.
7. Lub hardness ntawm ASME SA517 Qib B yog dab tsi?
Brinell hardness ntawm ASME SA517 Qib B feem ntau yog li ntawm 190 txog 235 HB. Qib ntawm hardness no muab qhov zoo sib npaug ntawm lub zog thiab ductility, kom ntseeg tau tias cov khoom siv tiv taus hnav thiab cuam tshuam thaum tseem yog weldable thiab ua haujlwm. Nws yog ib qho tseem ceeb nyob rau hauv daim ntawv thov uas yuav tsum tau muaj zog thiab tsis kam mus rau mechanical hnav thiab siab.
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
