Hauv Suav teb cov hlau kev lag luam,Kub Rolled Steel KaujUa haujlwm ua cov khoom siv ua hauv paus rau kev tsim kho, tshuab, thiab kev tsim khoom. Tswj los ntawm GB / T Cov Qauv Kawm Ntawv, cov khoom no tau raug cais los ntawm cov khoom siv tshuab, nrog Q235 thiab Q355 ua cov qib ntau tshaj plaws. Lawv cov kev qhia tshwj xeeb-npog qhov ntev, tshuaj lom neeg, thiab lub zog tsis sib xws-txiav txim siab lawv cov nra rau ntau yam kev siv.
Tus GB / t 3274-2017 Txheem qhia cov tswv yim kev xav tau rauKub Rolled Steel Kauj, Xws li cov tuab (feem ntau 1.2-25.4 hli) thiab dav (6 {{{14} {{14,200 hli). Rau cov tshuaj xyaw tshuaj, Q235 muaj cov pa roj carbon (c) (c) hauv qab 0.22%, manganese (mn) txog li 1.4%, thiab tshuaj tsw qab (p) los xyuas kom meej. Q355, ib qib siab dua, kho cov kev sib piv, nrog cov pa roj carbon capped ntawm 0.24% thiab manganese ncav cuag li vanadium lossis niobium rau kev ua tau zoo.
Mechanically, Q235Kub Rolled Steel KaujMuaj cov nqe lus tsawg kawg nkaus lub zog ntawm 237 mpa thiab tensile}}}}}}}}}}}}}}}}}}}}}}}}}} mpa thiab 470-630 MPa, feem. Cov khoom lag luam no Q235 raws li Tuam Tshoj sib npaug rau ASTM A36 (US), JIS SS400 (JAP), thiab EN S235JR (Tebchaws Europe). Q355 dlhos ntau dua nrog astm A572 gr. 50, Jis SM490, thiab rau S355jR, txawm hais tias hloov maj mam sib txawv nyob. Piv txwv li, European S355jr tso cai me ntsis qis phosphorus cov ntsiab lus (0.035% vs. GB / T's 0.045%), thaum A572 Gr. 50 Suav nrog Columbium rau lis kev ua kom zoo.
Lub divergence hauv cov qauv qhia txog thaj chaw ua ntej: Suav Kub Rolled Steel KaujHais txog tus nqi-ua tau zoo rau kev tsim kho huab hwm coj, whereas peb thiab EU qib feem ntau ua rau muaj kev sib xws rau kev ua haujlwm tseem ceeb. German Din sib npaug, zoo li St 37-2 (Q255), txuas ntxiv tswj kev tawm tsam ntawm cov khoom seem uas muaj.
Hauv kev lag luam thoob ntiaj teb, cov nuices teeb meem no. Q355Kub Rolled Steel KaujTej zaum yuav ntsib rau S355jr cov neeg kho tshuab qhib tab sis yuav tsum tau kuaj ntxiv rau CE (Pa Roj CE (Firbon sib npaug hauv European cov khoom siv. Ib yam li ntawd, thaum Q235 thiab SS400 feem ntau tau sib pauv ntau hauv cov qauv dav dav, cov neeg siv Japanese yuav hais kom cov khoom siv Jis-Fwm rau cov haujlwm rau pej xeem.
Rau cov neeg yuav khoom, nkag siab txog cov kev sib tw no ua kom zoo nkauj smoother procurement. Tuam Tshoj tusKub Rolled Steel KaujQib Xa cov qauv kev sib tw ntawm cov nqi sib tw, tab sis cov txheej txheem kev sib tw - txawm hais tias kev kho se tsis txaus ntseeg-corrosion-tuaj yeem sau cov khoom siv rau kev xaiv lossis kev ua haujlwm ntxiv.