Txheej txheem cej luam
S355JRH yog ibtsis yog- alloy zoo steeltsim tshwj xeeb rauHollow structural seem (HSS)siv hauv kev tsim kho. Qhov "H" tom kawg ntawm qib qhia tau hais tias nws yog npaj rau cov seem hollow (cov kav dej thiab cov raj). Nws yog ibhuab cua steel, txhais tau tias nws tsim kev tiv thaiv, tus kheej - kho oxide txheej (patina) ntawm nws qhov chaw thaum raug cov ntsiab lus, uas ua rau nws muaj zog tiv thaiv corrosion piv rau cov qauv carbon steels.
Qhov kev sib xyaw ua ke ntawm lub zog siab, zoo weldability, thiab atmospheric corrosion kuj ua rau nws yog ib qho kev xaiv zoo tshaj plaws rau kev siv cov qauv, tshwj xeeb tshaj yog qhov zoo nkauj thiab ntev - txo qis txij nkawm tseem ceeb.
Lub Npe Lub Npe: S355JRH
Lub npe qhia koj raws nraim li cas steel yog:
S: Sawv rau"Structural Hlau".
355: Qhia covyam tsawg kawg nkaus yield zogntawm cov khoom yog355 MPa rau(Megapascals) rau thicknesses Tsawg dua los yog sib npaug li 16 hli. Lub zog tawm los txo me ntsis nrog nce cov khoom thickness.
J: Denotes lubcuam tshuam toughness(Charpy V-Ntch test) ntawm+20 degree(chaw kub). 'J' yog ib qho ntawm cov qauv tsim rau qib no lub zog nqus.
R: Qhia tias cov hlau xa tuaj rau hauvKub Rolledmob.
H: Paub meej tias nws yog aNtug Hollow(Tub los yog Tube).
Cov Khoom Siv Tseem Ceeb
S355JRH feem ntau yog tswj hwm los ntawm European tus qauvTS EN 10210-1: 2006thiabTS EN 10210-2: 2006. Cov qauv no qhia txog cov txheej txheem kev xa khoom rau kub- ua tiav hollow seem ntawm tsis yog- alloy thiab nplua nplej hlau.
Chemical Composition (Tswj los ntawm EN 10210)
Cov tshuaj muaj pes tsawg leeg yog qhov tseem ceeb rau kev ua tiav cov huab cua thiab weldability. Cov ntsiab lus tseem ceeb muaj xws li:
| Element | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | Tsawg dua los yog sib npaug li 0.20 |
| Silicon (Si) | 0.10 - 0.60 |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.70 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035 |
| Copper (Cu) | 0.25 - 0.55 |
Lub luag haujlwm ntawm tooj liab (Cu):Qhov txhob txwm tshaj tawm ntawm tooj liab yog tus yuam sij rau cov hlau tiv thaiv huab cua. It promotes the formation of the dense, adherent rust patina that protects the underlying metal from further corrosion.
Mechanical Properties (los ntawm EN 10210)
Cov no yog cov khoom pov thawj yam tsawg kawg nkaus rau cov khoom siv txog li 16 hli tuab.
| Khoom | Tus nqi |
|---|---|
| Yam tsawg kawg Yield Strength (ReH) | 355 MPa rau |
| Tensile zog (Rm) | 470 - 630 MPa |
| Yam tsawg kawg Elongation ntawm Break (A₅) | 22% |
| Impact Zog (KV) | 27 J ntawm +20 degree |
Lus Cim: Cov txiaj ntsig thiab lub zog tensile yog thickness -nyob ntawm. Nco ntsoov sab laj tus qauv rau qhov tseem ceeb muaj feem xyuam rau koj cov yeeb nkab phab ntsa tuab.
Cov yam ntxwv tseem ceeb & qhov zoo
Siab zog:Nrog lub zog tawm los ntawm 355 MPa, nws muaj lub zog siab - rau - qhov hnyav piv, tso cai rau kev sib dua thiab ua haujlwm zoo dua qub piv rau qis dua - qib steels xws li S235.
Zoo heev huab cua Resistance:Nws lub ntsiab kom zoo dua. Kev tiv thaiv patina tshem tawm qhov xav tau rau kev pleev xim rau hauv ntau daim ntawv thov kev tsim vaj tsev thiab cov qauv, ua rau txo qis tus nqi tu lub neej.
Zoo Weldability:Cov ntsiab lus carbon tswj thiab chemistry ua rau nws yooj yim weldable siv txhua txoj hauv kev (SMAW, GMAW, FCAW, thiab lwm yam), yam tsis tas yuav tsum tau tshwj xeeb ua ntej - lossis tshaj tawm - kev kho cua sov hauv feem ntau.
Zoo Toughness:Lub guaranteed cuam tshuam toughness ntawm chav tsev kub ua rau nws haum rau ntau yam ntawm cov qauv siv nyob rau hauv uas tej zaum yuav raug rau dynamic loads.
Aesthetic Appeal:Lub rustic, sov xim av tsos ntawm huab cua patina feem ntau xav tau nyob rau hauv niaj hnub architectural designs rau txuas hniav, vaj tse, thiab facades.
Cov ntawv thov siv
S355JRH yeeb nkab yog siv nyob rau hauv ib tug dav array ntawm kev thov cov qauv siv:
Architectural thiab Structural Steelwork:Cov kab teeb pom kev, kab, thiab trusses hauv cov tsev.
Cov choj:Ob qho tib si neeg taug kev thiab txoj kev txuas hniav, tshwj xeeb tshaj yog qhov kev saib xyuas yooj yim.
Portal Ncej:Rau cov tsev lag luam thiab kev lag luam.
Transmission Towers & Fais fab Pylons.
Cranes thiab Lifting Equipment.
Heavy Vehicle Chassis thiab Roll Cages.
Ntau yam kev siv cov qauv hauv kev lag luam offshore thiab marine(qhov chaw tshwj xeeb yog tsim nyog).
Sib piv nrog Lwm Qib
| Feature | S355JRH | S355J2H | S235 JRH | ASTM A500 Gr. B |
|---|---|---|---|---|
| Txuj | TS EN 10210 | TS EN 10210 | TS EN 10210 | ASTM A500 1 |
| Yield zog | 355 MPa rau | 355 MPa rau | 235 MPa rau | 290 MPa (Min) |
| Ntsiab Feature | Huab cua hlau | Tsis yog Huab cua | Huab cua hlau | Standard Carbon hlau |
| Impact Test Temp. | +20 degree | -20 degree | +20 degree | Tsis xav tau |
| Kev siv loj | Exposed Structures | Painted/Protected Structures | Tsawg xav tau cov qauv nthuav tawm | General structural (US lag luam) |
Key Takeaway:S355J2H yog cov hlau zoo sib xws tab sis tsis muaj cov tshuaj lom neeg tshwj xeeb rau kev tiv thaiv huab cua. S235JRH yog cov huab cua huab cua tab sis muaj zog qis dua.
Cov ntsiab lus tseem ceeb rau kev siv
Khiav-tawm:Nyob rau lub sijhawm huab cua pib, kev khiav tawm - tawm ntawm qhov tsim patina tuaj yeem ua rau cov ntaub ntawv nyob ib puag ncig (xws li pob zeb lossis sib dua- pob zeb xim). Qhov no yuav tsum tau xav txog hauv kev tsim.
Ib puag ncig:Weathering steel ua tau zoo tshaj plaws nyob rau hauv ib puag ncig nrog alternating ntub thiab qhuav cycles. Nws tsis pom zoo rau cov dej hauv dej tsis tu ncua lossis siab -Chloride ib puag ncig (xws li, thaj chaw ntug dej hiav txwv, de-icing ntsev hnyav) yam tsis muaj kev xav txog kev tsim tshwj xeeb.
Fabrication:Thaum weldable, nws yog ib qho kev xyaum zoo siv cov khoom siv vuam uas sib tw lossis tshaj qhov corrosion kuj thiab lub zog ntawm lub hauv paus hlau.
Hauv cov ntsiab lus,S355JRH Carbon Steel Yeeb Nkabyog lub siab -lub zog, huab cua- resistant steel raj zoo tagnrho rau kev tsim kom ruaj khov, qis- tu, thiab zoo nkauj zoo nkauj cov qauv uas tau tsim los kav ntev xyoo lawm.
