GB / T 700-2006 Qib C steel yog cov khoom siv lees paub rau kev tsim Longitudinal Submerged Arc Welded (LSAW) kav. Qhov no sib raug rau covQ235C steel qib, uas muaj kev txhim kho qis- qhov kub thiab txias ua haujlwm piv rau Qib A thiab B, ua rau nws tsim nyog rau kev thov cov qauv siv ntau dua hauv qhov chaw txias dua.
Cov ntsiab lus tseem ceeb tau sau tseg hauv cov lus hauv qab no:
Cov ntsiab lus tseem ceeb
| Yam ntxwv | Kev piav qhia |
|---|---|
| Yam khoom | Longitudinal Submerged Arc Welded (LSAW) Yeeb Nkab, tsim siv JCOE, UOE, lossis cov txheej txheem tsim zoo sib xws. |
| Khoom Txheem | GB/T 700-2006: Carbon Structural Steels . |
| Common Steel Qib | Q235C. Tus "Q" sawv cev rau Yield Strength, "235" qhia qhov tsawg kawg nkaus lub zog ntawm MPa, thiab "C" qhia txog qib zoo nrog rau cov kev cai cuam tshuam ntawm0 degree . |
| Chemical Composition (Ladle Analysis, max %) | |
| Cov pa roj carbon (C): 0.17 | |
| Silicon (Si): 0.35 | |
| Manganese (Mn): 1.40 | |
| Phosphorus (P): 0.040 | |
| Sulfur (S): 0.040 | |
| Mechanical Properties (min) | |
| Yield zog:Ntau dua lossis sib npaug li 235 MPa (rau thickness Tsawg dua lossis sib npaug li 16 hli) | |
| Tensile zog:370-500 MPa | |
| Impact Energy (Charpy V-notch):Ntau dua lossis sib npaug li 27 Joules ntawm0 degree | |
| Hom Loj Loj | |
| Sab nraud txoj kab uas hla:219mm txog 2500mm + (kwv yees . 8" txog 100"+) | |
| Phab ntsa Thickness:5mm txog 25mm + | |
| Ntev:3m txog 18m (Customizable) | |
| Kev tsim khoom | 1. steel phaj xaiv thiab ntug milling. 2. Ntug crimping thiab tsim siv cov txheej txheem JCOE lossis UOE. 3. Sab hauv thiab sab nraud submerged arc vuam. 4. Mechanical expanding (rau UOE/JCOE). 5. Tsis yog- kuaj kev puas tsuaj (Ultrasonic, X-ray). 6. Kev ntsuas hydrostatic. 7. Xaus ntsej muag thiab beveling. |
| Cov ntawv thov siv | Cov qauv kev txhawb nqa hauv cov huab cua txias; cov khoom siv hauv tsev yuav tsum tau lav 0℃cuam tshuam toughness; txuas txuas; General engineering cov qauv raug rau qhov tsis tshua muaj ambient kub. |
| Daim ntawv pov thawj | Mill Test Certificate feem ntau yog muab raws li qhov xav tau ntawm qhov project. |
🔍 Cov ntsiab lus tseem ceeb kom nkag siab
Lub ntsiab lus ntawm "Qib C": Hauv GB / T 700-2006 tus qauv, tsab ntawv C qhia txog qhov tshwj xeebqib zoonrog kev tswj nruj dua ntawm phosphorus thiab sulfur piv rau Qib A thiab B. Cov yam ntxwv ntawm Qib C yog tias nwslav qhov cuam tshuam tsawg kawg nkaus ntawm 27 Joules ntawm 0 degree, ua rau nws yog qhov kev xaiv tsim nyog rau cov ntawv thov hauv qhov chaw txias dua qhov twg Qib B chav - qhov kub thiab txias tau lav (+20℃) tsis txaus .
Kev sib piv ntawm Q235 Qib:
| Qib | Impact Test Temperature | Daim ntawv thov tseem ceeb |
|---|---|---|
| Q235A | Tsis tau lav | Cov qauv dav dav, qis- cov kua dej siab, tsis yog- cov ntawv thov tseem ceeb |
| Q235B | +20℃(27J min) | Kev tsim kho dav dav, kev siv huab cua me me |
| Q235C | 0℃(27J min) | Cov huab cua txias, cov qauv sab nraum zoov raug rau qhov kub thiab txias |
| Q235D | -20℃(27J min) | Cov huab cua txias heev, thov kev thov |
Standard Update: GB / T 700-2006 tau hloov los ntawmGB/T 700-2019. Nws raug nquahu kom paub meej tias xyoo twg yuav tsum muaj rau koj qhov project.
Weldability: Q235C tswj tau zoo heev weldability vim nws cov ntsiab lus carbon tsawg (0.17% max), feem ntau tsis tas yuav tsum tau preheating nyob rau hauv ib txwm tej yam kev mob, uas txo cov nqi fabrication.
💡 Thaum Yuav Xaiv Qib C
XaivGB/T 700-2006 Qib C (Q235C) LSAW yeeb nkabthaum:
Cov qauv yuav raug nthuav tawmkub nyob ib ncig los yog qis dua khov (0 degree)
Daim ntawv thov yuav tsum tauguaranteed cuam tshuam toughness ntawm 0 degree
Cov phiaj xwm hauvtemperate rau cov huab cua txiasqhov twg Qib B chav- qhov ntsuas kub tsis txaus
Sab nraum cov qauv hauv cheeb tsam nrog lub caij ntuj no txias
Rau feem ntau kev tsim kho hauv cov huab cua me me, Qib B (Q235B) yog qhov txaus thiab kev lag luam ntau dua. Rau qhov chaw txias txias hauv qab -20 degree, Qib D (Q235D) yuav tsum.
Hauv cov ntsiab lus,GB/T 700-2006 Qib C (Q235C) LSAW yeeb nkabyog ib qho kev xaiv txhim khu kev qha rau cov qauv siv uas yuav tsum tau lav qhov cuam tshuam rau qhov hnyav ntawm 0 degree, muab qhov kev xaiv nruab nrab ntawm qhov dav dav - hom phiaj Qib B thiab txias - huab cua Qib D.
