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 European sib npaug ntawm A709 Qib 50W?
Tsis muaj ib qho, ncaj qha European sib npaug rau ASTM A709 Qib 50W. Qhov no yog vim A709 Qib 50W yog tus qauv tshwj xeeb, kev sib xyaw ua ke uas sib xyaw peb yam tseem ceeb:
Yam tsawg kawg nkaus lub zog ntawm 50 ksi (~ 345 MPa).
Huab cua (atmospheric corrosion-resistant) steel chemistry.
Yuav tsum tau choj- ntawv pov thawj zoo (AASHTO M 270) suav nrog kev ntsuas qhov hnyav rau cov cheeb tsam tshwj xeeb.
Yuav kom ua tiav kev ua haujlwm sib npaug hauv Tebchaws Europe, koj yuav tsum tau hais kom muaj kev sib xyaw ua ke ntawm cov qauv.
Kev Ua Haujlwm Zej Zog: S355J2WP + Kev Ua Haujlwm Chav EXC4
Cov khoom siv ze tshaj plaws thiab qhov kev sib tw yuav raug sib sau ua ke raws li hauv qab no:
| Kev xav tau | European Specification |
|---|---|
| Base Material & Weathering Property | S355J2WP raws li EN 10025-5. • S355=355 MPa min yield zog (ze li 345 MPa). • J2=Impact kuaj ntawm -20℃(rau toughness). • W=Weathering steel rau atmospheric corrosion. • P=Ntxiv Phosphorus rau patina tsim. |
| Choj-Quality & Toughness | Qhia meej txog kev ua raws li EN 10025-6 (weldable fine grain structural steels for heavy plates) los yog thov kom muaj zog ntxiv rau Charpy cuam tshuam lub zog thiab ntsuas kub raws li qhov project thaj tsam huab cua. |
| Fabrication & Quality System | Invoke EN 1090-2 (Kev ua tiav ntawm cov qauv hlau) nrog Kev Ua Haujlwm Chav EXC4 (chav kawm siab tshaj plaws rau cov txuas hniav thiab cov khoom siv dynamic-loaded), uas tswj xyuas nruj nruj, cov khoom siv taug qab, thiab kev tsim nyog vuam. |
Cov ntsiab lus tseem ceeb:
Lub zog De- ntsuam xyuas: European yield zog (piv txwv li, 355 MPa rau S355J2WP) yog rau thicknesses tsawg dua los yog sib npaug li 16 hli thiab txo rau cov phaj tuab. Qhov no yuav tsum tau muab xam rau hauv kev tsim.
System vs. Material: Hauv Tebchaws Europe, koj tab tom tsim lub kaw lus los ntawm cov khoom sib cais, cov khoom, thiab cov qauv ua tiav. Hauv Teb Chaws Asmeskas, A709 Qib 50W yog ib qho ua ntej - ntim, code- paub daws teeb meem.
Lwm Cov Qib: Rau cov phaj tuab tuab, S355NL (EN 10025-3/4) yuav raug txiav txim siab tab sis tsis yog cov hlau huab cua. Cov cuab yeej huab cua yog qhov tseem ceeb rau kev xaiv "W".
Tswv yim pom zoo rau Specification:
Txhawm rau muab qhov sib npaug European rau qhov project choj, ib qho kev qhia tshwj xeeb yuav nyeem:
* "Structural weathering steel daim hlau / yuav tsum ua raws li EN 10025-5: 2019, qib S355J2WP, nrog ntxiv Charpy V-notch cuam tshuam lub zog ntawm 27 J yam tsawg kawg nkaus ntawm -20℃. Cov khoom yuav tsum tau muab nrog daim ntawv pov thawj tshuaj xyuas 3.2 thiab tsim nyog rau kev tsim khoom raws li ExC09-2, EN 1.
Hauv cov ntsiab lus, qhov sib npaug zoo tshaj plaws yog cov huab cua steel qib S355J2WP, tab sis nws yuav tsum tau qhia meej meej nrog cov kev xav tau ntxiv thiab kev sib xyaw ua ke rau hauv qib siab -kev ua tiav-chav kawm cov txheej txheem ntawm European choj siv cov lej kom phim qhov kev ntseeg tau thiab lub hom phiaj ntawm A709. Qib 50.
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.
