Q355NHB yog lub siab -lub zog qis- alloy (HSLA) atmospheric corrosion resistant steel, feem ntau hu ua weathering steel. Nws belongs rau qis- alloy steel series ntawm carbon steel thiab stainless hlau, combining siab zog, zoo weldability, thiab superior atmospheric corrosion kuj.
Qib lub ntsiab lus:
- Q-Yield zog
- 355 - Yam tsawg kawg nkaus yield zog Ntau dua los yog sib npaug rau 355 MPa
- NH – "Nai Hou", txhais tau tias huab cua-resistant
- B – Qib zoo (qib cuam tshuam toughness)
Q355NHB tsim cov txheej tuab thiab ruaj khov xeb ntawm qhov chaw thaum raug rau qhov chaw, tiv thaiv kev xeb ntxiv thiab tshem tawm qhov xav tau rau kev pleev xim.
Q355NHB tshuaj muaj pes tsawg leeg (wt%)
| Element | C | Si | Mn | P | S | Cr | Ni | Cu |
|---|---|---|---|---|---|---|---|---|
| Cov ntsiab lus | 0.12–0.21 | 0.20–2.00 | 0.50–1.50 | Tsawg dua lossis sib npaug li 0.030 | Tsawg dua lossis sib npaug li 0.030 | 0.40–0.80 | Tsawg dua lossis sib npaug li 0.65 | 0.25–0.55 |
Cov ntsiab lus tseem ceeb ntawm alloying:
Cu, Cr, Ni - txhawb kev tsim cov txheej txheem tiv thaiv oxide
Si & Mn - txhim kho lub zog thiab deoxidation
Tsawg P & S - xyuas kom zoo toughness thiab weldability
Mechanical Properties
| Khoom | Kev xav tau |
|---|---|
| Yield zog (Rp0.2) | Ntau dua lossis sib npaug li 355 MPa |
| Tensile zog (Rm) | 490-630 MPa |
| Elongation (A) | Ntau dua lossis sib npaug li 21% |
| Lub zog cuam tshuam (KV, -20 degree) | Ntau dua lossis sib npaug li 41 J |
| Kev txo qis ntawm cheeb tsam (Z) | Ntau dua lossis sib npaug li 23% |
Cov khoom no ua kom ntseeg tau tias Q355NHB sib xyaw ua ke siab load-cov kabmob muaj peev xwm nrog qis qis-kub toughness thiab zoo plasticity.
Kev kho cua sov
Q355NHB steel phaj tuaj yeem muab rau hauv:
- Raws li -rolled (AR)
- Normalized (N)
- Normalized + Tempered
- Quenched & Tempered (Q + T)
- Kev daws & Kev laus
- Annealed
Cov kev ua haujlwm no tso cai rau cov hlau kom ua tau raws li qhov kev xav tau sib txawv ntawm lub zog, toughness, thiab seem stability.
Corrosion Resistance Performance
Piv nrog cov pa roj carbon zoo tib yam (Q235, Q345), Q355NHB muab:
- 2-8 npaug ntawm atmospheric corrosion life
- 50-80% txo tus nqi kho
- Tsis tas yuav rov pleev xim dua lossis tiv thaiv- xeb txheej
- Ua tus kheej- tiv thaiv xeb patina tom qab 6-12 lub hlis sab nraum zoov
- Qhov no ua rau Q355NHB zoo tagnrho rau lub sijhawm ntev - raug sab nraum zoov.
Qib sib npaug
Q355NHB yog sib npaug los yog zoo ib yam li:
| Txuj | Qib |
|---|---|
| ASTM | A588, A242 |
| EN | S355J2W, S355K2W |
| JIS | SPA-H |
| GB | qw 355n |
Yam khoom siv ntau yam
| Yam khoom | Ntau yam |
|---|---|
| Thickness | 3mm-120 hli |
| Dav | 1,000 - 3,500 mm |
| Ntev | 3,000 - 12,000 mm |
| Daim ntawv xa tuaj | Phaj, txiav - mus rau - qhov loj me, fabricated qhov chaw |
| Kev ua haujlwm | Txiav, drilling, vuam, khoov, nto ua ntej- xeb |
Kev siv ntawm Q355NHB Weathering Steel Phaj
Q355NHB yog tsim los rau ntev -lub sij hawm atmospheric raug tsis muaj txheej. Nws yog dav siv nyob rau hauv:
- Railway choj thiab txoj kev loj choj
- Thawv thav duab thiab tsheb thauj khoom
- Architectural facades thiab kab hlau rhuav phab ntsa
- Cov vaj tse hauv hiav txwv thiab ntug hiav txwv
- Roj derricks thiab offshore platforms
- Lub zog xa hluav taws xob
- Lub tank cia thiab cov thawv ntim tshuaj
- Sab nraum zoov sculptures thiab toj roob hauv pes tsim
Nws yog tshwj xeeb tshaj yog haum rau industrial, marine, nroog, thiab architectural ib puag ncig qhov twg corrosion kuj thiab zoo li yuav tsum tau.
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