Taw qhia:
Q235A yog carbon structural steel, saib QG/T700 kom paub meej. Tus qauv qub hu ua A3 steel (uas yog lub npe qub qub).
Q235A qis carbon steel qauv. Kub-dip galvanizing yog txheej txheem tiv thaiv corrosion. Muab lub phaj steel rau hauv cov kua zinc molten, da dej, thiab tom qab ntawd tshem tawm. Qhov saum npoo ntawm cov hlau phaj yuav npog nrog ib txheej nyias ntawm zinc. Txij li zinc muaj zog dua hlau, nws yog oxidized ua ntej nyob rau hauv ib puag ncig oxidizing, yog li khaws cia cov hlau phaj sab hauv.
Q235A muaj zoo toughness thiab yas, ib tug tej yam elongation, thiab zoo vuam kev ua tau zoo thiab kub workability. Q235A feem ntau yog siv hauv lub xeev kub dov. Nws dov steel seem, steel tuav, steel phaj, thiab steel kav yuav siv tau los tsim ntau yam welded structural qhov chaw, txuas hniav, thiab ib co ntawm cov cav tov, xws li screws, bolts, khi pas nrig, rivets, dab tshos, thiab connectors. Qws thiab lwm yam.
Carbon C: {{0}}.14~0.22 Silicon Si: Tsawg dua lossis sib npaug rau 0.30 Manganese Mn: {{1{{ 12}}}}.30 ~ 0.65 Sulfur S: Tsawg dua lossis sib npaug rau 0.050 Phosphorus P: Tsawg dua lossis sib npaug rau 0.045 Chromium Cr: Tso cai cov ntsiab lus seem Tsawg dua lossis sib npaug rau 0.030 Nickel Ni: Tso cai cov ntsiab lus seem tsawg dua lossis sib npaug rau 0.030 Copper Cu: Tso cai cov ntsiab lus seem tsawg dua lossis sib npaug rau 0.030.
Yog tias koj xav siv cov khoom siv, koj yuav tsum xub muaj kev nkag siab zoo ntawm cov khoom thiab nkag siab txog nws ntau yam khoom thiab cov cim, xws li ductility, hardness, thiab lwm yam, kom koj tuaj yeem siv tau zoo dua. q235a yog cov hlau ua tau zoo heev. Nws muaj cov khoom siv hlau zoo heev thiab tuaj yeem siv los ua ntau yam tseem ceeb. Nws lub npe kuj tseem ceeb heev. Thawj tsab ntawv q sawv cev rau qib ntawm cov hlau, tus lej tom qab tam sim ntawd sawv cev rau lub zog ntawm cov hlau, thiab tsab ntawv kawg a txhais tau hais tias cov ntsiab lus ntawm leej faj. Yuav luag tag nrho cov hlau yog So npe.
Kev tshuaj xyuas ntawm cov khoom siv kho tshuab ntawm Q235A:
Tensile zog (Mpa): 370 ~ 500
Yield strength (Mpa): when ≤16: ≥235; when >16~40: ≥225; >40~15; when >100~150: ≥195; when >150: Ntau dua lossis sib npaug rau 185
Elongation (%): ≤40: ≥26; >40 ~ 60: Ntau dua lossis sib npaug rau 25; > 60 ~ 100: Ntau dua lossis sib npaug rau 24 > 100 ~ 150: Ntau dua lossis sib npaug rau 22; > 150 ~ 200: Ntau dua lossis sib npaug rau 21
Txias dabtsi yog khoov (khoov 180 degrees): longitudinal steel thickness s16, dabtsi yog khoov center txoj kab uas hla d=a: thaum steel thickness> 16 ~ 100, dabtsi yog khoov center txoj kab uas hla d=2a
Thaum lub transverse steel thickness tsawg dua los yog sib npaug rau 16, qhov chaw khoov lub cheeb d=1.5a; thaum lub steel thickness yog> 16 ~ 100, qhov khoov center txoj kab uas hla d=2.5a;
