ASTM A709 Qib 50Wyog lub siab -lub zog, qis- alloy (HSLA) cov qauv hlau tshwj xeeb tsim los siv hauv kev tsim choj. Nws yog qhov tseem ceeb tshaj plaws rau nws lub peev xwm huab cua, uas tso cai rau nws siv rau hauv cov xim tsis muaj xim, liab qab.
Ntsiab Specifications & Properties
| Khoom | Tus nqi |
|---|---|
| Yam tsawg kawg nkaus Yield Strength | 50 ksi (345 MPa) |
| Tensile zog | 65-90 hli |
| Corrosion Index | ≥6.0 (ASTM G101) |
| Ntsiab Alloying Elements | Copper, Chromium, Nickel |
Cov yam ntxwv tseem ceeb
Huab cua muaj peev xwm: Thaum raug huab cua, nws txhim kho qhov ruaj khov, tiv thaiv oxide txheej (patina) uas tiv thaiv corrosion ntxiv.
Kev Kho: Vim tias lub patina tshem tawm qhov xav tau ntawm kev pleev xim, nws txo qhov ntev -cov nqi tu rau kev tsim kho vaj tse.
Durability: Nws muaj qhov zoo ntawm atmospheric corrosion kuj tshaj li cov qauv carbon steel, txawm tias cov tooj liab ntxiv.
Standard Forms: Muaj raws li cov qauv duab (W-beams, kaum), daim hlau, thiab tuav.
Dab tsi yog "W" sawv cev rau A709 Qib 50W?
Lub "W" hauv A709 Qib 50W sawv rau "Weathering."
Qhov no qhia tau hais tias nws yog ib tug weathering steel formulation. Cov yam ntxwv tseem ceeb ntawm qhov no txhais tau tias:
1. Atmospheric Corrosion Resistance:Cov hlau muaj cov ntsiab lus alloying tshwj xeeb (feem ntau yog tooj liab, chromium, npib tsib xee, thiab phosphorus) uas ua rau nws tsim ib txheej tuab, tiv thaiv xeb (patina) thaum raug huab cua mus ncig.
2.Designed rau kev siv Unpainted:Tsis zoo li tus qauv Qib 50, Qib 50W yog tsim los siv liab qab (tsis pleev xim) hauv qhov chaw tsim nyog. Lub ruaj khov patina ua raws li kev thaiv, ua kom qeeb ntxiv corrosion thiab tshem tawm qhov xav tau rau kev tiv thaiv xim.
3.Cov ntsiab lus thov:Cov qib "W" (50W, 70W, 100W) nyob rau hauv A709 tus qauv yog cov khoom siv zoo tshaj plaws rau kev tsim kho choj tsis muaj xim thiab lwm cov qauv raug pom qhov ntev - txo qis txij nkawm yog lub hom phiaj tseem ceeb.
Hauv luv luv: A709 Qib 50W yog huab cua (tsis pleev xim) version ntawm tus qauv A709 Qib 50 choj hlau.
1. Dab tsi yog A709 Qib 50W steel siv rau?
Nws yog tsim tshwj xeeb rau kev tsim kho choj uas tsis tau pleev xim thiab lwm cov qauv raug, qhov twg nws cov huab cua puag tsim muaj kev tiv thaiv xeb patina los tiv thaiv atmospheric corrosion.
2. Dab tsi yog "W" sawv cev rau A709 Qib 50W?
Tus "W" qhia tias nws yog ahuab cua steelformulation, tsim los tsim kev tiv thaiv oxide patina thaum raug rau huab cua.
3. Lub zog tawm ntawm A709 Qib 50W yog dab tsi?
Qhov tsawg kawg nkaus tawm lub zog yog 50 ksi (345 MPa) rau cov khoom tuab txog li 4 ntiv tes (100 mm), nrog txo lub zog rau cov ntu tuab.
4. A709 Qib 50W txawv ntawm A709 Qib 50 li cas?
Qib 50 yog cov qauv hlau uas yuav tsum tau muaj cov txheej txheem tiv thaiv, thaum Qib 50W yog cov huab cua steel tsim los siv liab qab (tsis pleev xim) hauv qhov chaw tsim nyog.
5. Puas yog A709 Qib 50W weldable?
Yog lawm, tab sis nws yuav tsum muaj huab cua tshwj xeeb- hom muab tub lim hlau (piv txwv li, E70xx-W series) thiab cov txheej txheem tsim nyog los tswj qhov corrosion kuj ntawm thaj chaw weld.
6. Cov khoom tiv thaiv corrosion ntawm A709 Qib 50W yog dab tsi?
Nws muaj kwv yees li 4-6 npaug ntawm huab cua corrosion kuj zoo dua li cov pa roj carbon steel, ua kom ruaj khov, tiv thaiv tus kheej patina.
7. A709 Qib 50W puas tuaj yeem siv rau hauv qhov chaw ntug dej hiav txwv?
Nws tuaj yeem siv tau, tab sis kev ua haujlwm yuav raug cuam tshuam rau hauv cov ntug hiav txwv loj (siab -chloride) txaws zones. Ua tib zoo tsim thiab ntsuas ib puag ncig.
8. Qhov sib npaug European ntawm A709 Qib 50W yog dab tsi?
Qhov sib npaug ze tshaj plaws yog weathering steel qibS355J0 wblos yogS355J2 wbRaws li EN 10025-5, txawm hais tias A709 tus qauv suav nrog cov kev cai choj tshwj xeeb.
9. Dab tsi yog Charpy cuam tshuam rau A709 Qib 50W?
Zoo li tag nrho cov qib A709, nws yuav tsum tau Charpy V- ntsuas qhov cuam tshuam rau ib cheeb tsam qhov kub thiab txias (xws li Zone 2: 20 ft-lb ntawm 40 ° F / 4 ° C).
10. Vim li cas thiaj xaiv A709 Qib 50W dhau A588 Qib B rau tus choj?
A709 Qib 50W yog tsim los rau kev nruj dua AASHTO choj daim ntawv pov thawj tus qauv (A709 / AASHTO M 270), suav nrog kev sim ua kom tawv tawv, ua rau nws qhov kev xaiv zoo tshaj rau txoj cai- tswj cov phiaj xwm choj.
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.
