Q355ND yog qhov kev siv ntawm GB / T1591 tus qauv tsim ntawm ib txwm dov tsis tshua muaj hlau hlau, Q355ND kev ua tau zoo, thiab ntau yam kev siv, feem ntau siv rau hauv cov tshuab loj loj, kev txiav, lossis siv rau cov khoom siv hluav taws xob cua thiab lwm yam. .
Cov tshuaj muaj pes tsawg leeg ntawm Q355ND steel phaj feem ntau suav nrog carbon, silicon, manganese, phosphorus, sulfur, tooj liab, npib tsib xee, chromium, molybdenum thiab lwm yam. Ntawm lawv, cov ntsiab lus ntawm C, Si, Mn, P, S yog 0.18% rau 0.22%, 0.15% rau 0.55 %. } }. 0.10% mus rau 0.30%. Kev sib koom ua ke ntawm cov ntsiab lus no ua rau Q355ND steel phaj muaj cov khoom siv zoo thiab kev tiv thaiv corrosion.
Q355ND steel phaj muaj cov cuab yeej zoo heev, nws lub zog tawm los thiab lub zog tensile siab, thaum muaj cov yas zoo thiab tawv. Feem ntau hais lus, lub zog tawm ntawm Q355ND steel phaj yog li ntawm 270 txog 345 MPa, lub zog tensile thaj tsam ntawm 470 txog 580 MPa, qhov elongation Ntau dua lossis sib npaug li 21%, thiab qhov cuam tshuam toughness Ntau dua lossis sib npaug li 47 J / cm2. .Cov cuab yeej cuab tam no ua kom muaj kev ntseeg siab ntawm Q355ND steel phaj hauv ntau yam kev siv engineering.
Q355ND steel phaj muaj qhov zoo corrosion kuj thiab tuaj yeem siv rau ntau qhov chaw corrosive. Nws qhov kev tiv thaiv corrosion feem ntau yog nyob ntawm cov tshuaj muaj pes tsawg leeg thiab kev kho saum npoo ntawm cov hlau phaj. Txij li Q355ND steel phaj muaj qee qhov nyiaj ntawm chromium, qhov no yuav pab txhim kho nws cov corrosion kuj hauv oxidising media. Tsis tas li ntawd, yog tias yuav tsum muaj kev tiv thaiv corrosion ntau dua, kev kho deg xws li galvanization thiab chromium plating tuaj yeem siv rau cov phaj steel los txhim kho nws cov corrosion kuj.
