Technical Profile: Q235A Carbon Structural Steel
Q235Ayog ib tug ubiquitous carbon structural steel qib txhais los ntawm Suav National StandardGB/T 700. Nyob rau hauv lub npe, "Q" stands rau Yield Point (QuFu), "235" sawv cev rau qhov tsawg kawg nkaus yield zog ntawm 235 MPa (rau phab ntsa thicknesses tsawg dua los yog sib npaug zos rau 16 hli), thiab "A" qhia cov qib zoo. Raws li kev nkag teb chaws - qib zoo, Q235A yog cov khoom siv rau ntau yam ntawm cov kav dej uas muaj zog thiab tus nqi siab -kev ua tau zoo yog qhov tseem ceeb.
Tshuaj muaj pes tsawg leeg ntawm Q235A
Cov tshuaj pleev ib ce ntawm Q235A yog optimized rau kev yooj yim ntawm huab hwm coj ntau lawm thiab zoo formability. Ib qho tseem ceeb sib txawv ntawm Qib A yog tias tus qauv tsis tso cai rau ib qho tshwj xeeb Aluminium (Al) ntxiv los yog kev lees paub Charpy V-tus nqi cuam tshuam, uas ua rau cov nqi tsim khoom qis.
| Element | Q235A Cov ntsiab lus siab tshaj (%) |
|---|---|
| Cov pa roj carbon (C) | 0.14–0.22 |
| Manganese (Mn) | 0.30–0.65 |
| Silicon (Si) | 0.30 max |
| Sulfur (S) | 0.050 max |
| Phosphorus (P) | 0.045 max |
Mechanical Performance thiab Strength
Txawm hais tias nws txoj hauj lwm raws li qib kev lag luam, Q235A muab cov cuab yeej siv tau zoo rau cov khoom siv tsis yog -cov qauv tseem ceeb thiab cov kev pabcuam thauj dej. Nws muaj lub zog tensile ntawm 370 thiab 500 MPa thiab elongation tsawg kawg yog 26%. Nws cov ductility zoo heev ua rau nws yooj yim rau khoov, coil, thiab tshuab rau ntau yam kav dej thiab fittings.
Sib piv: Q235A vs Q235B
Cov engineers yuav tsum ua tib zoo xaiv ntawm Qib A thiab Qib B:
Q235A:Tsis tas yuav muaj kev ntsuam xyuas cuam tshuam. Qhov zoo tshaj plaws rau kev thauj khoom zoo li qub thiab qis - kev thauj mus los ntawm dej / roj hauv qhov kub nruab nrab.
Q235B:Yuav tsum muaj qhov yuav tsum tau kuaj xyuas ntawm 20℃(min 27J). Txaus siab rau cov qauv uas yuav tsum muaj dynamic loads lossis txias ambient kub.
Common Industrial Applications
Q235A steel kav yog tus qauv rau kev thauj dej hauv nroog, kev lag luam scaffolding, ua liaj ua teb tsev cog khoom thav ntawv, thiab kev txhawb nqa hluav taws xob ib ntus. Hauv kev tsim kho, nws yog dav siv rau txhua kab thiab kab teeb hauv lub teeb steel lub tsev uas qhov kev ntxhov siab ntawm cov txheej txheem tau zoo - tau txhais thiab nyob rau hauv cov khoom siv los ntawm qhov pib.
FAQs
Puas yog Q235A haum rau siab - cov roj kab siab?
No. Q235A yog cov qauv hlau dav dav. Rau cov roj thiab roj kis tau tus mob, API 5L Qib B lossis siab dua yuav tsum tau ua kom ntseeg tau qhov kev ntseeg siab thiab kev nyab xeeb siab.
Kuv puas tuaj yeem vuam Q235A yooj yim?
Yog, nws muaj qhov zoo tshaj plaws weldability vim nws cov ntsiab lus carbon tsawg. Cov txheej txheem vuam txheem zoo li MMA, MIG, thiab SAW yog txhua yam ua tau zoo.
Q235A puas xav tau kev kho cua sov?
Feem ntau tsis muaj. Nws yog feem ntau muab nyob rau hauv "raws li -rolled" mob. Rau siab - cov raj muaj tseeb, nws yuav raug kos duab txias.
Puas yog Q235A sib npaug rau ASTM A36?
Lawv zoo sib xws hauv tensile lub zog thiab tawm los. A36 feem ntau suav hais tias ze dua rau Q235B raws li kev tswj hwm zoo thiab muaj kev ntseeg tau.
Kuv yuav tiv thaiv xeb ntawm Q235A cov kav dej li cas?
Txij li nws yog cov pa roj carbon monoxide, nws yuav tsum kub -dip galvanized lossis pleev xim nrog cov tshuaj tiv thaiv-corrosion primer rau sab nraum zoov lossis siv faus.
