Qhov sib txawv ntawmQ550NHERING STEELthiab dog digQ550B Txheej Txheem Hlautxuas rau ntawm xeb tsis kam, npog cov khoom siv, cov khoom siv mechanies, thiab cov ntawv thov. Ntawm no yog cov ncauj lus piav qhia:
1. Tshuaj lom neeg sib xyaw
| Lub ntsiab | Q550NH (GB / T 4171) | Q550B (GB / T 1591) | HOM PHIAJ LOS NTAWM QHOV TXIM |
|---|---|---|---|
| CU | 0.25–0.55% | Tsawg dua los yog sib npaug rau 0.30% | Txhim kho PATINA tsim hauv Q550NH. |
| Cr | 0.40–0.80% | Tsawg dua los yog sib npaug rau 0.30% | Boosts corrosion tsis kam. |
| Ni | Tsawg dua los yog sib npaug rau 0.65% | Tsis tas yuav | Txhim kho kev nruj me ntsis hauv Q550NH. |
| P, S | Txo cov kev txwv (p tsawg dua lossis sib npaug rau 0.030%) | Txwv me ntsis kev txwv | Txo Brittleness nyob rau hauv Q550NH. |
Qhov tseem ceeb taw tes: Q550nh'sCu - cr - niKev sib txuas ua kom sov, thaum Q550B ua ntej weldability thiab tus nqi.
2. Cov Khoom Siv Neeg Kho Tshuab
| Ntiag tug | Q550NH | Q550B |
|---|---|---|
| Paib lub zog | Ntau dua los yog sib npaug rau 550 mpa | Ntau dua los yog sib npaug rau 550 mpa |
| Lub zog tensile | 630-800 MPa | 550-720 mpa |
| Elongation | Ntau dua los yog sib npaug rau 17% | Ntau dua los yog sib npaug rau 16% |
| Kev Cuam Tshuam | Ntau dua los yog sib npaug rau 27j ntawm0 Qib | Ntau dua los yog sib npaug rau 34j ntawm-20 degree |
Tsab ntawv: Q550nh muajLub zog siab dua lub zogtab sis tuaj yeem qhiaqis qis - kub nrujTshaj li Q550b tshwj tsis yog npib tsib caug -}} hloov kho.
3. Corrosion Kuj
Q550NH: Ua ATiv thaiv txheej xeb(patina), txo kev txij nkawm nyob rau hauv qhib atirospheres.
Q550B: Xav tautha xim / galvanizingTxhawm rau tiv thaiv xeb hauv cov chaw pov tseg.
4. Kev thov
| Hlau | Raug Siv Siv | Xyeej tseg |
|---|---|---|
| Q550NH | Txuas hniav, ntim khoom, architectural façades | Submerged / Av Sib cuag |
| Q550B | Cov qauv hnyav, tshuab, welded thav ntawv | Unpainted sab nraum zoov kis |
5. Nqi & Kev Ua
Q550NH: ~ 10-20% kim kim vim kev siv nyiaj; tej zaum yuav xav tauTshwj Xeeb Vuam Hlau(piv txwv li, aws E7015-W2).
Q550B: Tus nqi qis; Yooj yim rau weld / txiav nrog cov qauv txheem.
Tseem Ceeb Takaway
XaivQ550NHrauUnpainted sab nraum zoov tej yaam numqhov twg corrosion kuj teeb meem. Xaiv RauQ550BrauKev Siv Davnrog kev tiv thaiv kev tiv thaiv.
