Q295NH thiab Q355NH yog Suav (GB / T) cov qauv huab cua (Corten) steel daim hlau, muab lub zog siab thiab zoo dua atmospheric corrosion tsis kam, nrog 'Q' rau steel, tus lej rau qhov muaj zog tsawg kawg nkaus (295 MPa & 355 MPa), thiab 'NH' qhia txog nws cov huab cua kev ua tau zoo, zoo tagnrho rau cov txuas hniav sab nraum zoov, kev tu vaj tse thiab kev tu vaj tse.
Specifications thiab Standards
| Txuj | Qib | Thickness (hli) | Yield zog (MPa) | Tensile zog (MPa) | Elongation (%) |
|---|---|---|---|---|---|
| GB/T 4171 | qw 355n | 3-40 | Ntau dua lossis sib npaug rau 355 | 490-630 | Ntau tshaj los yog sib npaug rau 20 |
| GB/T 4171 | qw 295n | 3-40 | Ntau dua lossis sib npaug li 295 | 430-580 | Ntau dua lossis sib npaug li 21 |
Chemical Composition (%)
| Element | C | Si | Mn | P | S | Cu | Ni | Cr | Nb |
|---|---|---|---|---|---|---|---|---|---|
| qw 355n | Tsawg dua los yog sib npaug li 0.20 | 0.30 | 1.00 | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.035 | 0.25 | 0.30 | 0.30 | Tsawg dua lossis sib npaug li 0.10 |
| qw 295n | Tsawg dua lossis sib npaug li 0.22 | 0.30 | 1.20 | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.035 | 0.20 | 0.25 | 0.20 | Tsawg dua lossis sib npaug li 0.10 |
Mechanical Properties
| Qib | Thickness (hli) | Yield zog (MPa) | Tensile zog (MPa) | Elongation (%) | Impact Zog (J) ntawm -20 degree |
|---|---|---|---|---|---|
| qw 355n | 3-16 | Ntau dua lossis sib npaug rau 355 | 490-630 | Ntau tshaj los yog sib npaug rau 20 | Ntau dua lossis sib npaug 27 |
| qw 355n | 16-40 | Ntau dua lossis sib npaug rau 345 | 470-630 | Ntau tshaj los yog sib npaug rau 20 | Ntau dua lossis sib npaug 27 |
| qw 295n | 3-16 | Ntau dua lossis sib npaug li 295 | 430-580 | Ntau dua lossis sib npaug li 21 | Ntau dua lossis sib npaug 27 |
| qw 295n | 16-40 | Ntau dua lossis sib npaug li 285 | 410-580 | Ntau dua lossis sib npaug li 21 | Ntau dua lossis sib npaug 27 |
Cov yam ntxwv tseem ceeb:
Corrosion Resistance: Ua ib qho kev tiv thaiv, ruaj khov xeb-zoo li txheej, txo qis corrosion ntxiv.
Lub zog siab: Q355NH muaj zog dua (Ntau dua lossis sib npaug ntawm 355 MPa tawm los) dua Q295NH (Ntau dua lossis sib npaug rau 295 MPa tawm los).
Weldability: Zoo vuam kev ua tau zoo, haum rau cov txheej txheem nyuaj.
Tsawg-Kev Ua Haujlwm Kub Kub: Q355NH muaj kev cuam tshuam zoo heev ntawm qhov kub thiab txias.
Daim ntawv thov:
Infrastructure: Railway choj, txoj kev loj overpasses, neeg taug kev taug kev.
Kev tsim kho: Architectural steel ncej, nroog overpass retrofitting.
Kev lag luam: Tsheb thauj mus los, cov thawv ntim khoom, cov pej thuam, thiab cov khoom siv uas raug rau huab cua.
Kev sib piv:
Q295NH: Yam tsawg kawg nkaus yield zog 295 MPa; feem ntau rau kev siv huab cua dav dav xws li ntim thiab cov qauv.
Q355NH: Yam tsawg kawg nkaus yield zog 355 MPa; siv qhov twg muaj zog dua thiab zoo dua qis - qhov kev ua haujlwm kub xav tau, xws li txuas hniav.
