Chemical Composition Difference
Q355NH: Muaj cov ntsiab lus alloy (0.25-0.55% Cu, 0.40-0.80% Cr, Tsawg dua lossis sib npaug li 0.50% Ni, Tsawg dua lossis sib npaug rau 0.035% P) uas tshwj xeeb ntxiv los txhawb kev tsim patina, nrog cov ntsiab lus carbon tsawg dua lossis sib npaug rau 0.18%
Ordinary carbon steel yeeb nkab: Tsuas muaj cov ntsiab lus tseem ceeb (Fe, C, Mn, Si), tsis muaj corrosion-cov ntsiab lus tsis muaj zog, thiab cov ntsiab lus carbon feem ntau yog 0.12-0.22%
Corrosion Resistance Qhov txawv
Q355NH: Tsim kom muaj qhov ntom ntom, nws tus kheej- kho patina hauv 6-12 lub hlis ntawm huab cua ntuj, txo tus nqi corrosion mus rau 1/4-1/10 ntawm cov pa roj carbon zoo tib yam, thiab tsis tas yuav tsum muaj kev tiv thaiv corrosion txheej hauv feem ntau qhov chaw sab nraum zoov
Ordinary carbon steel yeeb nkab: Cov ntaub ntawv xoob, tsis yog - tiv thaiv xeb nyob rau hauv ib puag ncig ntuj, tus nqi corrosion yog ceev, thiab nws yuav tsum tau coated nrog anti- xeb xim txhua txhua 3-5 xyoo, txwv tsis pub lub substrate yuav sai sai corroded.
Mechanical Properties Sib txawv
Q355NH: Muaj lub zog siab dua, nrog qhov tsawg kawg nkaus tawm lub zog Ntau dua lossis sib npaug ntawm 355 MPa, lub zog tensile 470-630 MPa, thiab zoo kub kub toughness (qhov cuam tshuam toughness Ntau dua lossis sib npaug rau 27 J ntawm -20 degree)
Ordinary carbon steel yeeb nkab: Lub zog qis dua, qhov qis tshaj tawm lub zog Ntau dua lossis sib npaug ntawm 235 MPa, tensile zog 375-500 MPa, thiab tsis zoo qis- kub toughness, uas yooj yim rau nkig tawg nyob rau hauv qhov kub thiab txias.
Ntev -Tus nqi sib txawv
Q355NH: Tus nqi pib yuav khoom yog 15-25% siab dua li cov pa roj carbon zoo tib yam, tab sis nws txuag lub sijhawm ntev - cov nqi txheej, rov- pleev xim thiab tu, thiab tag nrho cov nqi ntawm lub neej yog 20-30% qis dua
Ordinary carbon steel yeeb nkab: Tus nqi pib yuav tsawg, tab sis lub sij hawm ntev - tus nqi tu yog siab, thiab lub neej kev pab tsuas yog 1/2-1/3 ntawm Q355NH nyob rau hauv ib puag ncig sab nraum zoov
Daim ntawv thov Scope qhov txawv
Q355NH: Tsim nyog rau kev siv sab nraum zoov uas muaj kev tiv thaiv corrosion siab, xws li cov kav dej txhawb nqa choj, cov kav dej tawm sab nraud, cov kav hlau ua vaj tsev zoo nkauj, thiab cov kav xa hluav taws xob ntauwd.
Ordinary carbon steel yeeb nkab: Tsim nyog rau sab hauv tsev lossis qis- qhov chaw corrosion, xws li cov kav dej hauv tsev, cov kav dej txhawb nqa hauv tsev, thiab cov kav dej ib ntus
