SA514 Qib E
SA514 Qib E: Khoom Profile
SA514 Qib Eyog lub siab -lub zog, quenched thiab tempered alloy steel phaj nyob rau hauv ASTM A514 / A514M specification, txawv los ntawm nwstxhim kho atmospheric corrosion kujthaum tuav lub 100 ksi (690 MPa) yam tsawg kawg nkaus yield zog yam ntxwv ntawm A514 tsev neeg.
Ceev-Reference Specification ntawm SA514 Qib E
| Qeb | Specification |
|---|---|
| Txuj | ASTM A514 / ASME SA-514 Cov Lus Qhia |
| Hom | Alloy Steel, Quenched & Tempered (Q&T) |
| Yield zog (min) | 100 ksi (690 MPa) |
| Qhov tseem ceeb Distinguishing Feature | Cov ntsiab lus Molybdenum siab dua rau kev txhim kho corrosion (~ 2x carbon steel). |
| Thawj Niche | Siab -cov ntaub ntawv siv lub zog uas yuav tsum muaj qee qhov tsis muaj pleev xim, tab sis tsis hnyav txaus kom xav tau cov hlau hnyav (A588/A709-W). |
1. Tshuaj muaj pes tsawg leeg ntawm SA514 Qib E (Qhov hnyav %)
Chemistry yog optimized rau lub zog, hardenability, thiab corrosion kuj.
| Element | Yuav tsum muaj (Qib E) | Lub luag haujlwm / cuam tshuam |
|---|---|---|
| Cov pa roj carbon (C) | 0.12 - 0.21% | Base zog thiab hardenability. |
| Manganese (Mn) | 0.95 - 1.30% | Lub zog, toughness, thiab hardenability. |
| Silicon (Si) | 0.40 - 0.80% | Deoxidizer, ntxiv dag zog rau ferrite. |
| Chromium (Cr) | 0.40 - 0.65% | Hardenability thiab corrosion kuj. |
| Molybdenum (hli) | 0.20 - 0.30% | Key Differentiator. Txhim kho hardenability, siab - kub lub zog, thiab atmospheric corrosion kuj. |
| Boron (B) | 0.0005 - 0.005% | Ua kom cov nqi hardenability nce ntau heev- tau zoo. |
| Vanadium (V) | 0.03 - 0.08% | Grain refinement, nag lossis daus hardening. |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035% | Tswj impurity. |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035% | Tswj impurity. |
2. Mechanical Properties OF SA514 Qib E
Cov khoom yog ua tiav los ntawm quenching thiab tempering.
| Khoom | Kev xav tau |
|---|---|
| Yield zog (min) | 100 ksi (690 MPa) |
| Tensile zog | 115 - 135 ksi (790-930 MPa) |
| Elongation (hauv 2 ") | Ntau dua lossis sib npaug li 18% |
| Charpy V-Qhov cuam tshuam | Ntau dua lossis sib npaug li 40 ft -lb (54 J) @ -40℃F (-40 degree) |
3. Qhov tseem ceeb & Cov yam ntxwv ntawm SA514 Qib E
Siab zog & Toughness: 100 ksi yield nrog zoo heev tsawg -kub los tiv thaiv.
Txhim kho Corrosion Resistance: Muab kwv yees li ob npaug ntawm atmospheric corrosion kuj ntawm cov qauv carbon steel (xws li, A36) vim nws qhov tshwj xeeb alloy tshuav nyiaj li cas, tshwj xeeb yog siab Molybdenum.
Zoo Hardenability: Muaj peev xwm tswj xyuas cov khoom hauv cov ntu tuab (feem ntau txog 4 ntiv tes).
Weldable (nrog kev saib xyuas): Yuav tsum nruj me ntsis - cov txheej txheem hydrogen zoo ib yam li lwm qib A514.
4. Cov ntawv thov tseem ceeb ntawm SA514 Qib E
SA514 Qib E yog siv rau hauv siab - daim ntawv thov muaj zog qhov twg qee qhov kev cuam tshuam ib puag ncig, tab sis tag nrho cov huab cua huab cua tsis tau teev tseg.
Khoom siv hnyav rau kev siv sab nraum zoov:
Mining & Kev Tsim Kho: Excavator booms, shovel Cheebtsam, thiab crane cov qauv uas khaws cia lossis siv sab nraum zoov tab sis tej zaum yuav tau pleev xim dua lossis tau txais qee yam kev saib xyuas.
Industrial Structures:
Unpainted los yog intermittently tswj kev txhawb nqa ncej, platforms, thiab taug kev hauv cov nroj tsuag muaj.
Tsheb thauj mus los & Infrastructure:
Tshwj xeeb trailer thav duab thiab cov khoom raug rau huab cua.
Tsis yog - choj cov khoom siv nyob rau hauv uas nws corrosion kuj yog ib qho txiaj ntsig zoo.
Zog Sector:
Cheebtsam rau av-raws li qhov drilling rigs thiab cov qauv hluav taws xob tauj dua tshiab.
5. Fabrication Considerations ntawm SA514 Qib E
| Txheej txheem | Cov ntsiab lus tseem ceeb |
|---|---|
| Vuam | Cov txheej txheem nruj yuav tsum tau ua. Yuav tsum tau ua ntej- cua sov (300-400℃F/150-200 degree), low-hydrogen electrodes, thiab feem ntau Post-Weld Heat Treatment (PWHT). |
| Txiav | Thermal txiav (plasma, laser) yog tus qauv. Oxy-kev txiav roj yuav tsum tau ua ntej- cua sov kom tsis txhob muaj cov npoo tawv. |
| tsim | Kev ua kom txias yog qhov nyuaj. Kub sib sau ua raws li los ntawm re-kub- kev kho yog pom zoo rau khoov loj. |
6. Sib piv nrog Cov Qib Tseem Ceeb ntawm SA514 Qib E
| Qib | Qhov tseem ceeb sib txawv ntawm SA514 Qib E |
|---|---|
| SA514 Qib F | Feem ntau yog qib A514. Zoo sib xws 100 ksi lub zog tab sis tsis muaj kev txhim kho corrosion ntawm Qib E (qis Mo). |
| ASTM A709 Qib 100W | Muaj tseeb weathering steel rau txuas hniav. Nws muaj kev tiv thaiv corrosion ntau dua (4-6x carbon steel) thiab tau teev npe rau cov txuas hniav. Lub zog zoo ib yam. |
| ASTM A588 Cov Lus Qhia Tshwj Xeeb | Txheem 50 ksi weathering steel. Siv rau cov tsis pleev xim, nthuav tawm cov qauv. Ib nrab ntawm lub zog ntawm Qib E tab sis zoo dua thiab muaj peev xwm tiv thaiv corrosion ntau dua rau kev tsim vaj tsev. |
Qhov tseem ceeb Distinction: Corrosion Resistance Level
Nws yog ib qho tseem ceeb kom nkag siab tias SA514 Qib E qhov kev tiv thaiv corrosion (~ 2x carbon steel) yog nruab nrab.
Nws yog qhov zoo dua li cov pa roj carbon steel (A36) lossis tus qauv siab -lub zog steel (A572).
Nws yog qhov qis dua rau cov huab cua huab cua zoo li A588 lossis A709-W (~ 4-6x carbon steel).
Cov ntsiab lus
SA514 Qib E yog ib qho niche, siab - steel kev ua tau zoo uas txuas qhov sib txawv ntawm ultra- siab- lub zog steel thiab cov huab cua huab cua. Nws yog qhov kev xaiv zoo tshaj plaws thaum tus tsim qauv xav tau 100 ksi lub zog thiab tuaj yeem tau txais txiaj ntsig los ntawm qhov nruab nrab, "khoom plig" corrosion kuj nyob rau hauv ib daim ntawv thov raug, tab sis qhov twg tag nrho cov specification ntawm ib tug tseeb weathering steel yog tsis tsim nyog los yog nqi - txwv. Nws siv yog tsim nyog nyob rau hauv hnyav industrial thiab khoom siv es tsis yog nyob rau hauv architectural los yog choj cov ntsiab lus, qhov twg A588 los yog A709-W yuav yog tus qauv.
Dab tsi yog qhov txawv ntawm ASTM A514 GR E ntawm lwm qib?
GR E ua tau zoo nyob rau hauv qis- qhov kub thiab txias, ua rau nws haum rau qhov chaw txias nrog cov txiaj ntsig txog li 100 ksi hauv qab 2.5 ntiv tes.
Puas yog vuam A514 GR E ncaj nraim?
Yog lawm, nrog preheating thiab muab cov fillers kom tsis txhob tawg -peb daim hlau yog optimized rau nws.
Daim ntawv thov tseem ceeb phaj.
Offshore rigs, mining nyob rau hauv cov cheeb tsam txias, thiab cov qauv uas yuav tsum tau muaj kev cuam tshuam los ntawm lub temps qis.
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.
