ASME SA 517 Qib B yog dab tsi?
Qhov ntom ntawmASME SA 517 Qib B, hom quenched thiab tempered qis- alloy siab nkoj steel, yog kwv yees li7,85g 3(7850kg/m3los yog0.284 lb/in 3). Qhov ntom ntom no zoo ib yam nrog cov hlau alloy ib txwm, ua rau nws siv tau rau hauv siab - cov ntawv thov siab uas yuav tsum tau muaj zog tawm los.
ASME SA517 Qib B yog qhov qis- alloy siab lub nkoj hlau uas dhau los ua cov txheej txheem quenching thiab tempering kom ncav cuag lub zog tensile ntawm 115-135 ksi. Nws yog cov khoom ntawm kev xaiv thaum cov neeg tsim qauv ntsib "thickness txwv" ntawm cov pa steels; los ntawm kev siv SA517 Gr. B, ib lub nkoj uas ib txwm xav tau 100mm phab ntsa feem ntau tuaj yeem hloov kho nrog 40mm phab ntsa. Qhov no ua kom ntseeg tau tias txawm tias muaj lub zog siab, cov khoom khaws cia kom txaus kom txaus siab rau qhov kev nyab xeeb uas yuav tsum tau ua los ntawm ASME Code.
Cov yam ntxwv tseem ceeb
Nthuav Toughness:Kev cuam tshuam zoo heev ntawm ob qho tib si ambient thiab qis dua.
High Hardness:Muab kev tiv thaiv zoo dua rau qhov hnav thiab puas dua li carbon steels.
Strict Chemical Control:Tsis tshua muaj phosphorus thiab sulfur txwv los tiv thaiv weld tawg.
Thickness txwv:Feem ntau muaj nyob rau hauv daim hlau mus txog 1.25 nti (32 mm) rau Qib B.
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. SA514 Qib B)
Daim ntawv thov Focus:SA517 yog rauCov nkoj siab(ASME); SA514 yog rauKev tsim qauvsiv ( choj / tshuab).
Test Rigor:SA517 tau dhau qhov kev ntsuam xyuas nruj dua Kev Ntsuas Siab Zoo (PVQ).
Safety Factor:Kev tsim cov kev ntxhov siab uas tsim nyog tau suav nrog sib txawv raws li ASME Tshooj VIII rau SA517.
Ntawv pov thawj:SA517 yuav tsum muaj tag nrho MTR traceability rov qab mus rau lub melting kub.
Cov ntawv thov siv
Oxygen Storage Bullets:High - lub tog raj kheej siab rau kev kho mob lossis kev lag luam oxygen.
Spherical Gas Containers:Siab -siab "Horton Spheres" rau butane/propane.
Rocket Motor Cases:Lub teeb yuag, siab - lub zog muaj zog rau aerospace propulsion.
Ntau-Cov nkoj:Siv raws li qhov siab - lub zog sab nrauv qhwv hauv txheej txheej.
ASME SA517 Qib B puas tuaj yeem ua kom sov- kho?
Yog lawm, ASME SA517 Qib B yog cov cua sov- kho steel. Cov khoom siv feem ntau yog quenched thiab tempered los txhim kho nws lub zog thiab hardness. Cov txheej txheem kho cua sov pab ua kom cov hlau tsis zoo, txhim kho nws cov khoom siv zoo li toughness thiab qaug zog. Rau qee daim ntawv thov, tom qab-weld heat treatment (PWHT) tej zaum yuav tsim nyog los txo cov kev ntxhov siab thiab tiv thaiv kev tawg.
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.
Dab tsi yog cov ntsiab lus ntawm silicon hauv ASME SA517 Qib B?
Cov ntsiab lus silicon hauv ASME SA517 Qib B feem ntau yog li ntawm 0.15% txog 0.40%. Silicon yog ib qho tseem ceeb deoxidizer hauv steelmaking thiab pab txhawb rau cov hlau lub zog thiab kub tsis kam. Lub xub ntiag ntawm silicon pab txhim kho cov khoom muaj peev xwm tiv taus qhov kub thiab txias, ua rau SA517 Qib B haum rau siv hauv cov hlab ntsha siab thiab siab - siv zog
| Cov ntsiab lus | Qib B% |
|---|---|
| Cov pa roj carbon | |
| Kev ntsuas kub | 0.15-0.21 |
| Kev tshuaj xyuas cov khoom | 0.13-0.23 |
| Manganese | |
| Kev ntsuas kub | 0.70-1.00 |
| Kev tshuaj xyuas cov khoom | 0.64-1.10 |
| Phosphorus, max | 0.025 |
| Sulfur, max | 0.025 |
| Silicon | |
| Kev ntsuas kub | 0.15-0.35 |
| Kev tshuaj xyuas cov khoom | 0.13-0.37 |
| Chromium | |
| Kev ntsuas kub | 0.40-0.65 |
| Kev tshuaj xyuas cov khoom | 0.36-0.69 |
| Molybdenum | |
| Kev ntsuas kub | 0.15-0.25 |
Tensile Requirements
| 2.50 in. [65 mm] thiab Under | Tshaj 2.50 mus rau 6 nti [65-150 mm] | |
|---|---|---|
| Lub zog tensile | 115-135 [795-930] | 105-135 [725-930] |
| Yield zog, min, ksi [MPa] | 100 [690] | 90 [620] |
| Elongation hauv 2 nti [50 mm], min, % | 16 | 14 |
| Txo thaj tsam, min, %: | ||
| Rectangular qauv | 35 | – |
| Hloov cov qauv | 45 | 45 |
1. 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.
2. Dab tsi yog qhov sib npaug ntawm ASME SA517 Qib B?
ASME SA517 Qib B yog sib npaug rau ASTM A517 Qib B. Lwm qhov sib npaug thoob ntiaj teb tuaj yeem suav nrog cov ntaub ntawv xws li EN 10028-3 P355NL1 lossis DIN 17155 15Mo3, txawm tias cov qauv ntsuas tshwj xeeb thiab cov cai yuav txawv. Nws yog ib qho tseem ceeb rau kev txheeb xyuas cov kev cai hauv zos thiab cov khoom siv tshwj xeeb thaum xaiv cov khoom hloov pauv kom ntseeg tau tias muaj kev sib raug zoo nrog ASME BPVC lossis lwm cov lej.
3. Qhov siab tshaj plaws thickness ntawm ASME SA517 Qib B yog dab tsi?
ASME SA517 Qib B muaj nyob rau hauv daim hlau nrog thicknesses xws li 3/16 nti (4.76 mm) mus rau 4 nti (102 mm). Qhov siab tshaj plaws thickness nyob ntawm cov ntawv thov tshwj xeeb thiab cov kev xav tau. Rau cov ntu tuab, kev kho cua sov ntxiv, xws li tom qab-weld heat treatment (PWHT), tej zaum yuav tsum tau ua kom ntseeg tau tias cov khoom siv tshuab xav tau ua tiav thiab cov khoom ua tau zoo nyob rau hauv siab - kev ntxhov siab.
4. Dab tsi yog qhov kev siv ntawm ASME SA517 Qib B?
SA517 Qib B yog siv rau hauv kev tsim cov hlab ntsha siab, boilers, thiab cov khoom siv rau siab - kub, siab - ib puag ncig siab. Cov ntawv thov feem ntau suav nrog cov khoom siv hluav taws xob sib hloov, cov tso tsheb hlau luam, thiab cov reactors hauv cov chaw tsim hluav taws xob, cov chaw petrochemical, thiab cov tshuaj refineries. Nws lub zog siab thiab zoo heev toughness ua rau nws zoo tagnrho rau kev lag luam uas yuav tsum tau cov ntaub ntawv uas muaj peev xwm tiv taus txhua yam kev ntxhov siab thiab kub heev.
5. Brinell hardness rau ASME SA517 Qib B yog dab tsi?
Brinell hardness rau ASME SA517 Qib B feem ntau yog nyob ntawm 190 txog 235 HB. Qhov ntau ntawm hardness no ua kom cov khoom tuav nws lub zog thiab tsis kam hnav thaum tseem tso cai rau weldability zoo. Cov qib hardness yog optimized kom sib npaug zog, ductility, thiab tsis kam mus rau deformation, ua rau nws haum rau siab - siab daim ntawv thov nyob rau hauv xav tau kev lag luam xws li roj thiab roj.
6. Cov ntsiab lus phosphorus hauv ASME SA517 Qib B yog dab tsi?
Cov ntsiab lus phosphorus hauv ASME SA517 Qib B raug txwv rau qhov siab tshaj plaws ntawm 0.035%. Phosphorus tuaj yeem ua rau embrittlement, tshwj xeeb tshaj yog thaum vuam. Ua kom cov phosphorus qis qis kom ntseeg tau tias cov khoom tuav nws lub zog thiab lub zog, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov uas siab - siab tsis kam thiab cov khoom siv kho tshuab tseem ceeb heev.
7. 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 siab tawm los 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 zog hauv cov roj thiab roj, lub zog, thiab kev lag luam tshuaj.
Tau txais cov nqe lus hais txog ASME SA517 Qib B, Hu rau GNEE Steel
