Q345GNH yog ahigh-performance Suav weathering steelnrog zoo heev atmospheric corrosion kuj, feem ntauzoo dua tus qauv Q345NH thiab piv rau ASTM A588 / Corten-A, masinferior rau high-Ni marine-qib weathering steels.
1. Core alloying & kev ua haujlwm hauv paus
Alloy system: Cu + P + Cr + Ni (siab dua Cr/Ni dua Q345NH)
Patina: Ua kom tuab, tiv thaiv patina ~ 2-5 × qeeb corrosion dua li cov pa roj carbon zoo tib yam
Hom kev siv: General sab nraum cov qauv, kos npe, txuas hniav, ntim
2. Kev sib piv ncaj qha nrog rau lwm cov huab cua huab cua
A. Cov qib suav hauv tsev
| Qib | Huab cua tsis kam vs Q345GNH | Qhov tseem ceeb sib txawv |
|---|---|---|
| qw 345n | Qhov qis dua | qis Cr/Ni; tsawg ruaj khov patina; txom nyem nyob rau hauv industrial / ntug hiav txwv zones |
| Q345 GNHL | Zoo sib xws los yog me ntsis zoo dua | Optimized rau qis-kub toughness; tib yam corrosion kuj |
| qw 355g | me ntsis zoo dua | Siab zog; zoo sib xws los yog marginally txhim kho corrosion kuj |
| Q345qENH / Q345qDNHY-I | Superior | Siab Ni (0.8-1.2%); chloride kuj zoo dua (marine) |
| SPA-H (Japanese) | Sib piv | Zoo sib xws Cu-Cr-Ni system; ze li sib npaug atmospheric tsis kam |
B. International qib
| Qib | Huab cua tsis kam vs Q345GNH | Sau ntawv |
|---|---|---|
| ASTM A588 (Corten-A) Txheem | Zoo heev / sib npaug | Tib hom corrosion; qhov sib txawv me me; patina tus cwj pwm yuav luag zoo tib yam |
| S355J0WP / S355J2WP (EN) | Sib piv | European sib npaug; zoo sib xws |
| High-Ni marine qib (piv txwv li, 1Ni-series) | Qhov tseem ceeb tshaj | Ni ntau dua lossis sib npaug li 0.8%; tsim rau cov ntug hiav txwv dej / ntsev; 5-10 × zoo dua li cov pa roj carbon steel |
3. Cov ntsiab lus ntawm kev txheeb ze
Zoo duaQ345NH, Q235NH, zoo tib yam carbon steel (Q235, Q345B)
Sib npaug rauQauv: ASTM A588, SPA-H, Q355GNH, Q345GNHL
phem dua: High-nickel marine weathering steels (Q345qDNHY-I, 09CuPCrNi-A nrog siab Ni)
