** 1. Dab tsi yog Q235A hlau sib npaug rau? **
Q235A steel yog dav dav rau ** astm 36 ** steel nyob rau hauv cov nqe lus ntawm cov neeg kho tshuab thiab daim ntawv thov dav. Hauv European cov qauv, ib qho sib npaug yuav yog ** s235jr ** (raws li EN 10025-2). Nws yog ib qho tseem ceeb kom nco ntsoov tias thaum cov qib kawm tau zoo sib xws, lawv tsis zoo ib yam. Qhov xwm txheej muaj tseeb yog nyob ntawm cov khoom tshwj xeeb uas yuav tsum tau ua, xws li kev cuam tshuam todoness thiab tshuaj lom neeg txwv.
** 2. Dab tsi yog qhov ntsuas kub ntawm Q235 khoom siv? **
Cov Q235 cov khoom siv feem ntau siv rau cov ntawv thov ambient kub. Nws cov khoom siv muaj zog pib txo qis qhov kub. Feem ntau, nws tuaj yeem siv tau rau kev pabcuam kub txog li, 150 {{{{}}} 200℃(302-392℃(30-392℃f) **. Txog kev pab cuam kub, cov qib "zoo" (zoo li Q235B, C, D) nrog tsawg-kub (cryogenic) kev pabcuam.
** 3. Dab tsi yog qeb 43A? **
Qeb 43a yog ib qeb steel hlau txhais tau nyob rau tam sim no -}}}}}}}}}}} Cov neeg Askiv BS 4360: 1986. Nws yog ib tug nquag carbon {{}} Manganese steel rau cov qauv txheej txheem dav dav, xws li cov tuam tsev thiab txuas hniav. Tus "43" txhais tau ib qho tsawg kawg tensile lub zog ntawm 430 MPa, thiab "ib qho" qhia tau cov khoom ntiag tug tshwj xeeb ntawm cov khoom ntiag tug.
** 4. Dab tsi yog sib npaug ntawm Qib 43A hlau? **
Nrog kev rho tawm ntawm BS 4360, Qib 43A tau hloov pauv ntawm European Cov Qauv Kawm Niaj Hnub No. ** tshwj xeeb ** nyob ntawm qhov kev cuam tshuam nyuaj rau cov kev xav tau). Nyob rau hauv Astm qauv, ib qho ze sib npaug hauv cov ntsiab lus ntawm lub zog yog ** astm A283 qib C **.
** 5. Dab tsi yog cov paib zog zog ntawm 43A hlau? **
Rau qib 43A hlau rau BS 4360: 1986, qhov tsawg kawg nkaus tau meej meej lub zog yog ** 245 mangapagals (MPA) ** rau cov ntu txog 16 hli tuab. Cov txiaj ntsig lub zog txo qis rau cov khoom siv thicker, uas yog ib tus cwj pwm uas muaj cov qauv ntawm cov qauv vaj ntxwv.
