Nws muaj Q + tus lej + cim qib zoo + deoxidation txoj kev cim. Nws tus lej steel yog prefixed nrog "Q", uas sawv cev rau lub ntsiab lus ntawm cov hlau. Cov lej hauv qab no sawv cev rau tus nqi taw tes tawm hauv MPa. Piv txwv li, Q235 sawv cev rau carbon structural steel nrog rau qhov taw tes tawm (σs) ntawm 235 MPa. ② Yog tias tsim nyog, cov cim qhia txog qib zoo thiab deoxidation txoj kev tuaj yeem raug cim tom qab tus lej hlau. Cov cim qib zoo yog A, B, C, thiab D raws. Deoxidation txoj kev cim: F sawv cev rau boiling hlau; b sawv cev rau semi-tua steel; Z sawv cev rau cov hlau tua; TZ sawv cev tshwj xeeb tua hlau. Cov hlau tua tsis tas yuav tsum tau cim nrog cov cim, uas yog, Z thiab TZ tsis tas yuav tsum tau cim. Piv txwv li, Q235-AF sawv cev rau qib A boiling steel.
Tshwj xeeb-lub hom phiaj carbon steel, xws li choj hlau, marine steel, thiab lwm yam, yeej siv cov qauv sawv cev ntawm cov qauv hlau, tab sis ib tsab ntawv qhia lub hom phiaj yog ntxiv rau qhov kawg ntawm tus lej hlau.
Q235B cov ntsiab lus
Carbon C: Tsawg dua lossis sib npaug rau 0.20%
Silicon Si: Tsawg dua lossis sib npaug rau 0.35%
Manganese Mn: Tsawg dua lossis sib npaug li 1.4%
Sulfur S: Tsawg dua lossis sib npaug rau 0.045%
Phosphorus P: Tsawg dua lossis sib npaug rau 0.045%
Chromium Cr: Tso cai cov ntsiab lus seem tsawg dua lossis sib npaug rau 0.30%
Nickel Ni: Tso cai cov ntsiab lus seem tsawg dua lossis sib npaug rau 0.30%
Copper Cu: Tso cai cov ntsiab lus seem tsawg dua lossis sib npaug rau 0.30%
Lus Cim: Txoj Kev Deoxidation: F, b, Z
