### 1. Dab tsi yog qhov txawv ntawm Q235a thiab SS400?
** Q235A ** yog ib tus qauv xov xwm Suav cov qauv qib qis hauv GB / T 700. ** Lub ntsiab sib txawv nyob hauv cov qauv lawv tus kheej:
* ** Cov tshuaj sib xyaw ua si & tus neeg lav: ** Q235A tau teev tseg rau cov tshuaj lom neeg (xws li carbon, manganese, thiab lwm yam) tab sis tsis tuaj yeem lav tus nqi them hluav taws xob cuam tshuam cov khoom. SS400 tsis qhia meej cov tshuaj lom neeg cov tshuaj lom neeg ua haujlwm; Nws yog tus neeg tuaj yeem lav cov cuab yeej siv tshuab (tensile thiab tawm lub zog). Rau SS400, cov tshuaj lom neeg cov khoom siv yog feem ntau pom zoo ntawm cov khoom xa khoom thiab cov neeg siv khoom.
* ** Qib theem zoo: ** Hauv Q235 nyob rau hauv Q235 series, cov "qib" qib theem pib zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo li phosphorus zoo tshaj plaws, nrog cov leej faj tshaj plaws piv rau B, C, thiab cov qib siab.
Hauv kev siv cov ntsiab lus, rau ntau cov ntawv thov kev tsim kho tshiab, tab sis cov qauv tshwj xeeb uas yuav tsum tau ua los ntawm txoj haujlwm yuav tsum tau ua raws.
### 2. Dab tsi yog qhov sib txawv ntawm Q235 thiab Q275?
Ob Q235 thiab Q275 yog suav cov qauv hlau qauv hlau qib los ntawm GB / T 700 tus qauv. Cov ntsiab lus tseem ceeb yog lawv ** kev nce qib ** qib **.
* ** Q235 ** muaj ib tug ** yam tsawg kawg vim muaj lub zog ntawm 235 mpa **.
* ** Q275 ** muaj ib tug ** yam tsawg kawg cov txiaj ntsig lub zog ntawm 275 mpa **.
Raws li qhov txiaj ntsig ntawm cov kev xav tau lub zog siab dua, Q275 feem ntau muaj cov tshuaj muaj roj carbon ntau dua lossis muaj zog dua tab sis nyuaj rau WELD ntau dua Q235.
### 3. Dab tsi yog qhov sib txawv ntawm ST37 thiab Q235?
** ST37 ** yog qhov qub tsim qauv rau cov qauv hlau los ntawm tus qauv DIN 17100, uas tau hloov ntau dua los ntawm EN 10025 Txuj Ci (piv txwv li S235). ** Q235 ** Yog Suav sib npaug los ntawm GB / T 700.
Lawv suav hais tias ** Phau ntawv sib npaug "qib. Ob qho tib si muaj tsawg kawg vim muaj lub zog muaj zog ntawm 235 MPa. Cov "st" hauv St37 sawv rau "qauv steel" thiab "37" qhia txog qhov tsawg kawg nkaus tensile lub zog ntawm 370 MPa, uas yog kuj ua raws li qhov yuav tsum tau ua rau Q235. Qhov sib txawv yog feem ntau hauv lub teb chaws cov qauv uas lawv muaj thiab cov kev sib txawv me hauv kev sim lossis kev faib tawm zoo.
### 4. Dab tsi yog Q235 B?
** Q235B ** yog qib tshwj xeeb ntawm Q235 steel hauv Suav GB / T 700 tus qauv.
* ** Q235 ** Qhia tias yam tsawg kawg yog 235 MPa.
* Tsab ntawv ** "B" ** piav qhia qib theem zoo, uas yog siab dua "" tab sis qis dua "C" thiab "D".
Cov yam ntxwv tseem ceeb ntawm Q235B yog:
* Nws muaj kev tswj hwm cov ntsiab lus ntawm cov ntsiab lus ntawm kev ua phem impurities li phosphorus (p) thiab Sulfur (s) piv rau Q235A.
* Nws yuav tsum tau sim rau ** Charpy V -} negch cuam tshuam lub zog ntawm chav chav (20 degree) **.
Qhov no ua rau Q235b tsim rau cov kev siv dav dav ntawm cov ntawv thov, suav nrog Welded qauv ntawm huab cua sov, qhov twg theem pib ntawm kev nruj me me yog xav tau.
### 5. Puas yog ST37 ib qho carbon steel?
** Yog, st37 yog ib tug pa roj carbon hlau. ** Tshwj xeeb tshaj plaws, nws tau cais raws li tus txheej txheem hlau ** lossis ** Me me roj carbon steel **. Nws cov khoom yog feem ntau yog muab los ntawm nws cov ntsiab lus carbon, nrog tsuas yog me, tso cai ntawm lwm cov khoom xws li silicon thiab manganese. Nws tsis muaj cov tseem ceeb ntawm cov ntsiab lus xws li chromium, npib tsib xee, lossis molybdenum uas yuav cais nws ua cov hlau alloy.
