Dab tsi GB lub kaum sab xis cov khoom sib npaug rau cov huab cua steel ASTM A588?

GB sib npaug rau cov huab cua steel ASTM A588 yog Q355NH series (xws li, Q355GNH), raws li GB/T 4171. Cov no yog siab- zog, qis- alloy structural steels nrog txhim kho atmospheric corrosion kuj. Ob leeg A588 thiab Q355NH tsim muaj kev tiv thaiv, adherent xeb patina uas retards ntxiv corrosion, tso cai rau siv nyob rau hauv unpainted lug. Lawv cov khoom siv kho tshuab tau zoo sib xws, nrog qhov tsawg kawg nkaus tawm lub zog ntawm 50 ksi (345 MPa). Chemically, ob qho tib si ua tiav huab cua tiv thaiv los ntawm kev sib ntxiv ntawm cov ntsiab lus alloying xws li tooj liab, Chromium, Nickel, thiab Silicon. Tej yam txawv txawv; Piv txwv li, A588 xav tau qhov tsawg kawg nkaus ntawm Chromium thiab tooj liab, thaum Q355NH qhia txog Phosphorus{18}}Copper lossis Phosphorus-Chromium-Copper system. Lub sij hawm ntev - kev ua haujlwm corrosion tau lees paub los ntawm kev sim sib txawv, tab sis lawv suav tias yog qhov sib npaug. Rau cov haujlwm thoob ntiaj teb uas hais txog A588, Q355NH tuaj yeem yog lwm txoj hauv kev tsim nyog, muab cov tshuaj tshuaj ntsuam xyuas pom tias muaj cov ntsiab lus tseem ceeb ntawm huab cua.