ASTM A992 H-Beamyog lub siab -lub zog, qis- alloy (HSLA) steel tshwj xeeb tsim los rau dav -flange (W-puab) cov qauv siv. Nws tau dhau los ua tus qauv kev xaiv rau siab- cov tsev nce siab, cov qauv kev lag luam, thiab seismic-cov haujlwm tiv thaiv vim nws lub zog ua kom zoo- rau- qhov hnyav piv, weldability zoo heev, thiab cov khoom siv kho tshuab.
Mechanical Properties
| Khoom | Specification |
|---|---|
| Yield zog | 345 MPa (50 ksi) yam tsawg kawg nkaus |
| Tensile zog | 450-650 MPa (65-95 ksi) |
| Yield-rau-Tensile Ratio | Tsawg dua lossis sib npaug li 0.85 (tswj rau kev tsim seismic) |
| Elongation | Ntau dua lossis sib npaug li 18% (hauv 200 mm) |
Cov yam ntxwv tseem ceeb:
Engineered rau W-shapes (dav-flange I-beams)
Txo cov ntsiab lus carbon rau kev txhim kho weldability
Lub zog sib npaug - rau - hnyav rau kev tsim kho kom zoo
Superior weldability piv rau A36 thiab A572
Seismic kev ua tau zoo los ntawm kev tswj cov khoom tawm los ntawm - mus rau -tensile ratio
Chemical Composition (Maximum%)
| Lub ntsiab | Ntau tshaj % |
|---|---|
| Cov pa roj carbon (C) | 0.23 |
| Manganese (Mn) | 1.65 |
| Phosphorus (P) | 0.04 |
| Sulfur (S) | 0.05 |
| Silicon (Si) | 0.40 |
| Copper (Cu) | 0.60 |
| Carbon sib npaug (CE) | 0.47 (txhim kho weldability) |
Qhov zoo ntawm A992 H-Beam
Superior weldability: Cov ntsiab lus qis dua li A572 ua kom yooj yim vuam thiab txo cov kev xav tau ua ntej
Cov khoom siv sib xws: Cov kev qhia tshwj xeeb me me tau lees tias kev ua haujlwm zoo ib yam
Seismic-npaj: Tswj tau tawm los-rau-tensile piv muab ductility rau lub sijhawm- tawm tsam thav duab
Tus nqi-npaum: Ua kom zoo rau cov qauv kev ua haujlwm nrog lub zog siab dua-rau- hnyav
Muaj dav dav: Pom tau tias yog tus qauv qib rau W-cov qauv hlau
Cov yam ntxwv ua
| Txheej txheem | Yam ntxwv |
|---|---|
| Txiav | Zoo heev nrog txhua txoj kev; laser thiab plasma txiav pom zoo rau precision |
| tsim | Txwv kev tsim nyog; tuaj yeem khoov nrog cov cuab yeej tsim nyog |
| Vuam | Weldability zoo nrog txhua yam txheej txheem; Cov pa roj carbon tsawg tsawg txo cov kev xav tau preheat |
| Tshuab dhos | Zoo machinability rau bolt qhov thiab kev sib txuas npaj |
Hom A992 W-Shape Sizes
Qhov tob (W4-W44): 4 nyob rau hauv 44 nyob rau hauv
Flange dav: 100 hli rau 400+ hli
Web thickness: 6 hli mus rau 50+ hli
Nco tseg: Kev cai ntau thiab tsawg muaj raws li qhov kev thov rau cov haujlwm tshwj xeeb
Sib piv nrog Lwm Cov Qib Steel
| Feature | A992 H-Beam | A572 gr 50 | A36 | A913 |
|---|---|---|---|---|
| Yield zog | 50 ksi (345 MPa) | Ntau dua lossis sib npaug li 50 ksi | 36 ksg | Siab dua (nrog CE siab dua) |
| Tensile zog | 65-95 hli | 65 ksg | 58-80 hli | Siab dua hauv cov ntu hnyav |
| Weldability | Zoo heev, tswj chemistry | Zoo | Nruab nrab | Zoo ib yam li A992 |
| Seismic Performance | Siab, tswj piv | Nruab nrab | Txwv tsis pub | Nruab nrab |
| Kev siv yam | Dav - flange kab teeb, siab - nce & seismic qauv | Cov qauv tsim qauv | Daim hlau, kev tsim kho dav dav | Cov ntu hnyav xav tau lub zog siab dua |
Daim ntawv thov ntawm A992 H-Beam
High-nce tsev ncej
Cov tsev lag luam thiab chaw ua haujlwm
Ntau- zaj dab neeg thiab seismic- cov qauv tiv thaiv
Cov tsev lag luam thiab kev cob qhia
Chaw nres tsheb cov qauv
Cov choj, kev txhawb nqa tshuab, thiab cov khoom siv loj
Kev txiav txim siab tsim
Seismic Design: Tswj tau tawm los- mus rau -tensile ratio ua kom ductility rau lub sijhawm- tiv thaiv thav duab
Kev sib txuas tsim: Zoo weldability tso cai rau kev sib txuas zoo welded
Kev Tiv Thaiv Hluav Taws Xob: Yuav tsum muaj kev tiv thaiv hluav taws rau ib lub tsev lis dej num
Kev Tiv Thaiv Corrosion: Kev pleev xim lossis txheej pom zoo rau qhov chaw sab nraum zoov lossis corrosive ib puag ncig
Standards & Specifications
ASTM A992 / A992M: Txuj rau cov qauv steel duab
Cov Kev Xav Tau Ntxiv S1: Charpy V- qhov ntsuas qhov cuam tshuam muaj
AISC 360: Kev qhia tshwj xeeb rau cov vaj tsev steel
A992 H-Beam yog qhov mus- mus rau dav - flange structural steel rau niaj hnub siv. Nws muab lub zog siab, weldability, ductility, thiab sib xws, ua rau nws zoo tagnrho rau cov tsev siab -nce, seismic zones, industrial structures, thiab hnyav - load applications.
Piv rau A36 thiab A572, nws muaj kev ua tau zoo tshaj plaws rau W- cov kab teeb pom kev zoo, ua kom muaj kev ntseeg siab thiab ua haujlwm zoo hauv cov haujlwm engineering.
Q1: Dab tsi yog ASTM A992 H-Beam thiab nws txawv li cas ntawm A36 H-Beam?
ASTM A992 H-Beam yog lub siab- lub zog, qis- alloy structural steel beam feem ntau siv rau hauv lub tsev thav duab thiab txuas hniav. Piv rau A36 H-Beam, uas muaj lub zog tawm los ntawm 250 MPa, A992 muab lub zog tawm los ntau dua ntawm 345 MPa, txhim kho toughness, thiab weldability zoo dua rau kev siv cov txheej txheem niaj hnub.
Q2: Cov tshuaj muaj pes tsawg leeg ntawm ASTM A992 H-Beam yog dab tsi?
Cov tshuaj muaj pes tsawg leeg ntawm A992 suav nrog carbon Tsawg dua lossis sib npaug li 0.23%, manganese 0.50–1.50%, phosphorus Tsawg dua lossis sib npaug li 0.035%, sulfur Tsawg dua lossis sib npaug li 0.045%, thiab silicon Tsawg dua lossis sib npaug li 0.40%. A992 kuj suav nrog microalloying ntsiab xws li vanadium thiab niobium los txhim kho lub zog thiab tawv. Piv nrog rau A36, qis carbon cov ntsiab lus thiab microalloying txhim khu weldability thiab txo brittleness.
Q3: Dab tsi yog cov yam ntxwv ntawm ASTM A992 H-Beam?
A992 H-Beams muaj qhov tsawg kawg nkaus lub zog ntawm 345 MPa (50 ksi) thiab tensile zog ntawm 450-620 MPa. Qhov tsawg kawg nkaus elongation nyob rau hauv 200 mm yog 18%, thiab Charpy cuam tshuam toughness yog txhim kho rau qis -kub siv. Hauv kev sib piv, A36 beams tsis tshua muaj zog tab sis me ntsis ductile, ua rau lawv tsim nyog rau cov tswv cuab ntawm cov qauv tsis tseem ceeb.
Q4: Qhov luaj li cas thiab qhov ntev npaum li cas rau ASTM A992 H-Beam?
A992 H-Beams muaj nyob rau hauv qhov ntau thiab tsawg ntawm W8x10 txog W44x335 (los yog zoo sib xws, nyob ntawm lub zeb). Standard tolerances muaj xws li ± 3% rau flange thiab web thickness thiab ± 6 hli rau beam qhov tob. Qhov kam rau ua yog piv rau A36 tab sis xyuas kom meej qhov sib xws rau siab - cov ntawv thov muaj zog qhov twg cov khoom xa tawm meej yog qhov tseem ceeb.
Q5: Puas tuaj yeem ASTM A992 H-Beam tau welded thiab fabricated yooj yim?
Yog lawm. A992 H-Beams yog tsim los rau siab weldability nrog cov qauv txheej txheem (SMAW, GMAW, FCAW) yam tsis muaj preheating nyob rau hauv ib txwm tej yam kev mob. Microalloying thiab cov ntsiab lus carbon tsawg txo qhov kev pheej hmoo ntawm kev tawg thaum vuam. Bending thiab drilling kuj tseem ua tau, txawm hais tias lub vojvoog nruj yuav tsum ua raws li ASTM cov lus qhia.
Q6: Kev sim ua dab tsi ntawm ASTM A992 H-Beams?
Cov kev ntsuam xyuas muaj xws li kev ntsuas tensile, kuaj khoov, tshuaj ntsuam xyuas muaj pes tsawg leeg, thiab kev tshuaj xyuas qhov muag. Mill Test Reports (MTRs) muab cov ntaub ntawv. Charpy impact tests tej zaum yuav xav tau rau thaj chaw txias. Piv nrog rau A36, A992 yuav tsum muaj kev txheeb xyuas nruj dua ntawm cov khoom siv kho tshuab vim muaj zog ntau dua.
Q7: Dab tsi yog cov ntawv thov rau ASTM A992 H-Beams?
A992 H-Beams yog dav siv nyob rau hauv steel-framed vaj tse, ntev-span txuas hniav, industrial chaw, thiab siab- sawv cev. A36 beams tseem yuav siv tau rau hauv qhov nruab nrab lossis qis -load daim ntawv thov, tab sis A992 yog qhov zoo dua qhov muaj zog dua - rau - qhov hnyav piv thiab qhov hnyav yog qhov tseem ceeb.
Q8: Yuav ua li cas tiv thaiv corrosion rau ASTM A992 H-Beams?
A992 beams yog muab rau hauv zeb tiav, nrog rau kev xaiv galvanization lossis pleev xim rau qhov chaw corrosive. Qhov zoo thiab qhov ncaj yog qhov tseem ceeb rau kev vuam thiab bolting. Txoj kev tiv thaiv corrosion zoo ib yam li A36, tab sis A992 beams feem ntau xav tau kev saib xyuas ntxiv vim lawv siv rau hauv qhov raug lossis siab - cov qauv nce.
Q9: Ntev npaum li cas thiab txoj kev xa khoom rau ASTM A992 H-Beams yog dab tsi?
Standard ntev yog feem ntau 6-12 meters, nrog rau kev cai ntev muaj. Beams yog bundled rau kev thauj mus los thiab tshuaj xyuas qhov ncaj. Dimensional raug yog ib qho tseem ceeb los xyuas kom meej kev sib dhos thiab load- bearing kev ua tau zoo.
Q10: Puas yog ASTM A992 H-Beams tuaj yeem siv rau qhov kub thiab txias?
A992 H-Beams yog haum rau qhov kub thiab txias me ntsis. Kev cuam tshuam hnyav ua rau lawv muaj kev nyab xeeb dua rau cov huab cua txias dua piv rau A36. Rau qhov qis lossis siab heev - qhov kub thiab txias ib puag ncig, engineers yuav xav tau kev kuaj xyuas ntxiv lossis xav txog lwm cov qib tshwj xeeb steel.