A588 Qib Ayog lub siab -lub zog, qis- alloy (HSLA) cov qauv hlau hu ua "weathering steel" (feem ntau hu ua Corten), khoom plig rau nws zoo heev atmospheric corrosion kuj, tsim ib tug ruaj khov, tiv thaiv xeb-zoo li patina, ua rau nws zoo tagnrho rau unpainted daim ntaub ntawv superior zoo li txuas hniav, vaj tse, thiab cov tsheb ciav hlau tsis tu ncua. Nws muaj qhov tsawg kawg nkaus tawm lub zog ntawm 50 ksi (345 MPa) thiab yog siv rau hauv welded, bolted, los yog riveted kev tsim kho uas durability thiab zoo nkauj tseem ceeb.
Cov yam ntxwv tseem ceeb
Corrosion Resistance: Tsim cov txheej txheem oxide tiv thaiv, ua kom qeeb ntxiv corrosion; plaub zaug tiv taus ntau dua li cov pa roj carbon steel tsis kho.
Lub zog muaj zog: Yam tsawg kawg nkaus lub zog ntawm 50 ksi (345 MPa), tso cai rau cov qauv sib dua.
Cov tsos mob: Tsim kom muaj qhov tshwj xeeb, zoo nkauj zoo nkauj xeb-zoo li ua tiav thaum raug rau cov khoom.
Daim ntawv thov: choj, vaj tse, tsheb ciav hlau, tsheb loj, tso tsheb hlau luam, thiab cov yam ntxwv ntawm vaj tse.
Qib: Muaj nyob rau hauv Qib A, B, C, thiab K, nrog Qib A feem ntau muaj cov ntsiab lus tshwj xeeb rau cov ntsiab lus xws li Manganese, Chromium, thiab tooj liab.
Dab tsi yog European sib npaug ntawm A588 Qib A?
Qhov ncaj tshaj plaws nyob sab Europe sib npaug rau ASTM A588 Qib A yog cov huab cua steel qib S355J0WP lossis S355J2WP raws li EN 10025-5: 2019.
Nov yog cov ncauj lus kom ntxaws sib piv thiab piav qhia:
Direct sib npaug: S355J0WP / S355J2WP (EN 10025-5)
| Khoom | A588 Qib A (ASTM A588) | Qhov sib npaug European: S355J0WP / J2WP (EN 10025-5) |
|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | 345 MPa (rau t Tsawg dua lossis sib npaug rau 100mm) | 355 MPa (rau t Tsawg dua los yog sib npaug rau 16 hli, ces txo nrog thickness) |
| Tensile zog | 485 MPa min | 470 - 630 MPa |
| Ntsiab Feature | Atmospheric corrosion-resistant (weathering) steel | Atmospheric corrosion{0}}resistant steel (cim "W") |
| Corrosion Resistance | ~ 4-6x zoo dua li cov pa roj carbon steel | Muab piv; "P" qhia tias muaj phosphorus ntau ntxiv rau corrosion kuj. |
| Impact Toughness | Feem ntau tsis tau teev tseg rau Qib A. | J0: Kuaj ntawm 0 degree J2: Kuaj ntawm -20 degree |
| Kev Xa Khoom | Raws li - dov los yog normalized. | Feem ntau yog - dov. |
Vim li cas nws yog qhov sib tw: "S355" qhia txog 355 MPa yam tsawg kawg nkaus tawm lub zog (zoo heev rau A588's 345 MPa). Lub "W" tshwj xeeb tshaj yog nws cov huab cua hlau rau atmospheric corrosion kuj. "P" qhia txog cov ntsiab lus phosphorus ntau dua, uas txhim kho kev tiv thaiv patina tsim, piv rau cov hlau alloy ntawm A588.
Cov Lus Qhia Tseem Ceeb & Kev Xaiv Cov Lus Qhia
1.Sub- Qib Xaiv (J0 vs. J2):
S355J0WP: Charpy cuam tshuam kuaj ntawm 0℃. Haum rau feem ntau kev tsim kho.
S355J2WP: Charpy cuam tshuam kuaj ntawm -20℃. Siv qhov no rau cov qauv hauv cov huab cua txias uas qhov kub thiab txias yog qhov kev txhawj xeeb. Qhov no feem ntau yog qhov sib tw ze rau cov lus qhia dav dav.
2. Thickness nyhuv ntawm lub zog:
Zoo li feem ntau cov hlau, cov khoom muaj zog ntawm S355 qib txo qis nrog tuab. Piv txwv li, S355J2WP muaj 355 MPa tawm los rau t Tsawg dua los yog sib npaug rau 16mm, tab sis tsuas yog 335 MPa rau 16mm 3.Alternative European Weathering Qib: S355J0W / S355J2W: Cov huab cua tib yam hlau tsis muaj Phosphorus ("P"). Me ntsis qis corrosion kuj tab sis zoo weldability. S355K2W: Rau ntau dua toughness. Rau cov phaj tuab, S355NL (normalized) los ntawm EN 10025-4 tej zaum yuav raug txiav txim siab, tab sis nws tsis yog tshwj xeeb yog huab cua. 4. Welding Consumables:Thaum vuam cov European sib npaug, koj yuav tsum siv cov hlau muab tub lim ua raws li cov qauv zoo li EN ISO 16834-B (piv txwv li, G 46 6 M 21 4NiCu) uas yog tsim los rau cov huab cua huab cua los tswj kev ua haujlwm corrosion. Thaum qhia txog qhov sib npaug European rau A588 Qib A: Rau kev siv dav dav, qhia S355J2WP (zoo toughness ntawm -20 degree). Paub meej tias lub zog tawm los ntawm koj cov khoom thickness raws li cov qauv tsim. Xyuas kom cov txheej txheem vuam siv cov huab cua tsim nyog -qib khoom siv kom haum rau qhov kev tiv thaiv corrosion ntawm lub hauv paus hlau. Hauv cov ntsiab lus, qhov tseem ceeb thiab ua haujlwm zoo sib npaug European qib yog S355J2WP (los yog S355J0WP), vim nws sib xyaw ua ke zoo sib xws nrog lub zog atmospheric corrosion kuj uas txhais tau tias A588 steel. 1. Dab tsi yog A588 Qib A steel siv rau? 2. Lub zog tawm ntawm A588 Qib A yog dab tsi? 3. A588 Qib A txawv li cas A572 Qib 50? 4. Puas yog A588 Qib A weldable? 5. Dab tsi yog qhov corrosion kuj ntawm A588 Qib A? 6. Puas yog A588 Qib A hlau yuav tsum tau pleev xim? 7. Cov tshuaj muaj pes tsawg leeg ntawm A588 Qib A yog dab tsi? 8. Cov European sib npaug ntawm A588 Qib A yog dab tsi? 9. A588 Qib A puas tuaj yeem siv rau hauv thaj chaw ntug dej hiav txwv? 10. Dab tsi yog qhov tsis zoo ntawm A588 Qib A? 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. Cov lus pom zoo
A588 Qib A feem ntau yog siv rau cov qauv siv xws li txuas hniav, cov tsev, thiab kev tsim kho sab nraum zoov qhov twg nws cov atmospheric corrosion kuj (weathering steel) muaj txiaj ntsig.
Qhov tsawg kawg nkaus yield zog ntawm A588 Qib A yog 50 ksi (345 MPa) rau ntu txog li 4 ntiv tes (100 hli) tuab.
Qhov sib txawv tseem ceeb yog kev tiv thaiv corrosion: A588 Qib A yog cov huab cua huab cua uas tsim cov patina tiv thaiv, thaum A572 Qib 50 yog tus qauv siab - zog qis- alloy (HSLA) hlau xav tau xim lossis txheej rau kev tiv thaiv corrosion.
Yog lawm, nws yog yooj yim weldable siv cov txheej txheem xws li SMAW, GMAW, thiab FCAW, txawm hais tias nws yuav tsum muaj tsawg tsawg -hydrogen kev coj ua thiab tej zaum yuav xav tau cov hlau muab tub lim kom haum rau cov huab cua.
Nws muaj kwv yees li 4-6 npaug ntawm atmospheric corrosion kuj zoo dua li cov pa roj carbon steel vim nws cov alloying ntsiab (xws li Cu, Cr, Ni), uas tsim ib tug ruaj khov, adherent xeb patina.
Tsis yog, pleev xim tsis tas yuav tsum muaj kev tiv thaiv corrosion; nws yog tsim los siv liab qab (tsis pleev xim) los ua ib qho kev tiv thaiv patina. Xim tuaj yeem siv rau kev zoo nkauj.
Nws muaj cov ntsiab lus alloying xws li tooj liab (Cu), chromium (Cr), thiab npib tsib xee (Ni) rau huab cua tsis kam. Cov ntsiab lus tseem ceeb: Carbon max 0.19%, Phosphorus max 0.04%, Copper 0.25-0.40%.
Qhov ze tshaj plaws nyob sab Europe huab cua sib npaug yog S355J0W lossis S355J2W raws li EN 10025-5, uas muaj qhov zoo sib xws corrosion thiab lub zog.
Nws tuaj yeem siv tau, tab sis kev ua haujlwm yuav raug txo qis hauv cov ntug hiav txwv loj (ntsev -} nplua nuj) lossis muaj huab cua zoo heev. Cov qib tshwj xeeb xws li A588 Qib C lossis ntau dua resistant alloys feem ntau pom zoo rau cov xwm txheej zoo li no.
Muaj peev xwm tsis zoo muaj xws li: tus nqi pib siab dua li cov qauv hlau, muaj peev xwm ua rau cov dej ntws tawm ntawm cov chaw nyob ib puag ncig thaum tsim patina, thiab txo cov corrosion tsis kam nyob rau hauv ib puag ncig ntub dej los yog cov dej qab ntsev heev.