P355NL1 steel phaj yog ib yam uas tsis tshua muaj alloy high-strength steel qauv, lub ntsiab Cheebtsam muaj xws li carbon, silicon, manganese, phosphorus, sulfur, nitrogen thiab lwm yam khoom. Ntawm lawv, cov pa roj carbon yog ib qho tseem ceeb tshaj plaws hauv cov hlau, uas tuaj yeem ua rau lub zog thiab tawv tawv ntawm cov hlau, tab sis tib lub sijhawm yuav txo cov plasticity thiab toughness ntawm hlau. Silicon thiab manganese yog ib qho tseem ceeb alloying ntsiab nyob rau hauv steel, lawv muaj peev xwm refine lub koom haum qauv ntawm steel, txhim kho lub zog thiab hardness ntawm hlau. Phosphorus thiab sulfur yog cov teeb meem hauv cov hlau, lawv ua rau cov brittleness thiab txo cov tawv tawv ntawm cov hlau. Nitrogen yog ib yam khoom uas muaj cov tshuaj ntxiv dag zog thiab kev laus zog, uas tuaj yeem ua rau kom muaj zog thiab tawv tawv ntawm cov hlau.
P355NL1 steel phaj muaj cov khoom siv zoo heev, nws lub zog tensile, lub zog tawm los, elongation thiab cuam tshuam toughness siab. Nyob rau hauv chav tsev kub, lub zog tensile ntawm P355NL1 steel phaj feem ntau yog nruab nrab ntawm 400-650MPa, lub zog tawm los yog feem ntau ntawm 270-400MPa, qhov elongation feem ntau ntawm 18% -25%, thiab feem ntau toughness yog nyob nruab nrab ntawm 80-100J/cm². Thaum kub siab, cov khoom siv kho tshuab ntawm P355NL1 steel phaj yuav raug cuam tshuam rau qee qhov, tab sis tseem tuaj yeem tswj tau qib siab.
P355NL1 steel phaj muaj qhov zoo corrosion kuj thiab tuaj yeem siv rau hauv ntau qhov chaw corrosive. Piv txwv li, nyob rau hauv ib puag ncig marine, P355NL1 steel phaj tuaj yeem tiv thaiv corrosion ntawm seawater thiab marine cua; Nyob rau hauv ib puag ncig tshuaj, P355NL1 steel phaj tuaj yeem tiv thaiv corrosion ntawm ntau yam tshuaj lom neeg. Tsis tas li ntawd, P355NL1 steel phaj muaj kev qaug zog zoo thiab kev cuam tshuam, thiab tuaj yeem tswj kev ua haujlwm ruaj khov nyob rau hauv ntau yam kev ntxhov siab.
