ASTM A588 Qib A thiab A588 Qib B muaj siab atmospheric corrosion kuj, uas yog superior rau cov pa roj carbon zoo tib yam vim yog tsim los ntawm kev tiv thaiv oxide zaj duab xis ntawm cov hlau nto, uas slows ntxiv corrosion. Ob lub steels yog lub zog siab, qis-alloy weathering steels uas muaj qhov tsawg kawg nkaus lub zog ntawm 50, 000, uas tso cai rau cov qauv sib dua ntawm cov khoom siv hluav taws xob, yog li txo cov nqi.
Cov hlau no feem ntau yog siv rau hauv cov ntawv tsis pleev xim los txo cov nqi kho xws li pleev xim. Txij li thaum lawv txoj kev loj hlob, weathering steels tau siv nyob rau hauv ntau yam kev siv xws li txuas hniav, railcars, cranes, transmission towers, highway utility ncej, tshuaj nroj tsuag, factories thiab kho mob shipbuilding.
Chemical Composition (%) ntawm A588 Qib A Weathering Steel:
| C | Si | Mn | P | S | Ni |
| 0.19 | 0.30-0.65 | 0.80-1.25 | 0.04 | 0.05 | 0.40 |
| Cu | Cr | Mo | N | V | Nb |
| 0.25-0.40 | 0.40-0.65 | - | 0.01 | 0.02-0.10 | - |
Mechanical Properties ntawm A588 Qib A Weathering Steel:
| Tensile zog, kis [MPa] | Tensile zog, kis [MPa] |
| 100mm los yog qis dua | [485] |
| 100mm -125 hli | [460] |
| 125mm -200 hli | [435] |
| Yield zog, min, kis [MPa] | Yield zog, min, kis [MPa] |
| 100mm los yog qis dua | [345] |
| 100mm -125 hli | [315] |
| 125mm -200 hli | [290] |
| Elongation hauv qab. [50 hli], min, % | 21 |
| Elongation hauv qab. [50 hli-200mm], min, % | 18 |
