Q235 thiab Q275 yog ob qib carbon structural steel qib los ntawm GB / T 700, Suav tus qauv rau kub -rolled carbon structural steels, thiab ob qho tib si yog muab los ua welded los yog seamless yeeb nkab rau cov tsev, dej xa mus thiab kev engineering. Tsab ntawv Q stands rau Suav lo lus rau yield, thiab tus lej tom qab yog qhov tsawg kawg nkaus yield zog nyob rau hauv MPa, yog li Q235 guarantees tsawg kawg yog 235 MPa thiab Q275 yam tsawg kawg nkaus 275 MPa. Xaiv ntawm lawv, thiab nruab nrab ntawm cov qib zoo uas ua raws li tus lej, txiav txim siab lub zog, weldability thiab cuam tshuam toughness.
Yuav ua li cas lub GB / T 700 Kev Xaiv Ua Haujlwm
Lub npe yog nyeem los ntawm sab laug mus rau sab xis thiab txhua ntu yog lub ntsiab lus ruaj khov:
Q- yield zog qib, los ntawm Suav lub sij hawm rau yield point.
235 or 275 ib- Yam tsawg kawg nkaus yield zog nyob rau hauv MPa rau lub thinner thickness ranges.
A, B, C lossis D- qib zoo, uas teeb tsa cov phosphorus thiab sulfur cov ntsiab lus tso cai thiab qhov yuav tsum tau ua rau kev xeem.
Xaiv cov lus xaus- ib tsab ntawv ntxiv los ntawm lub zeb lossis tus neeg yuav khoom los kos npe rau kev coj ua deoxidation lossis qhov yuav tsum tau tshwj xeeb.
Q235 vs Q275
Ob qib tsis yog - alloy carbon steels; qhov sib txawv yog lub zog theem uas cov chemistry thiab cov dov xyaum xa. Cov txiaj ntsig zoo rau cov tuab tuab yog qhia hauv qab no.
| Khoom | Q235 | Q275 |
|---|---|---|
| Yam tsawg kawg yield zog ReH | 235 MPa rau | 275 MPa rau |
| Tensile zog Rm | 370 txog 500 MPa | 410 txog 540 MPa |
| Tsawg kawg elongation | 26 % | 22 % |
| Cov ntsiab lus carbon | qis | Siab dua, kom ncav cuag lub zog siab dua |
| Weldability | Zoo heev, qhov kev zam txim tshaj ntawm ob | Zoo, tab sis cov seem tuab tau txais txiaj ntsig los ntawm kev tswj cov txheej txheem vuam |
| Hom kev siv | Cov qauv dav dav, cov kav dej, scaffolding | Loaded cov tswv cuab, tsheb, machinery thav duab, hnyav yeeb nkab dej num |
Kev lag luam tawm tswv yim- tawm yog ncaj nraim. Q275 nqa ntau lub load rau ib chav tsev ntawm seem, uas yuav txuag tau qhov hnyav, tab sis cov ntsiab lus carbon ntau dua txo ductility thiab ua rau vuam me ntsis zam txim. Qhov twg ib tug qauv yog welded rau ntawm qhov chaw nyob rau hauv cov huab cua txias, qhov txawv no deserves saib xyuas.
Qib A, B, C thiab D
Tsab ntawv tom qab tus naj npawb lub zog tswj impurity txwv thiab toughness. Q235A muaj ntau tshaj plaws phosphorus thiab sulfur txwv thiab tsis muaj kev cuam tshuam rau kev xeem; B, C thiab D nruj cov chemistry ib kauj ruam thiab ntxiv Charpy V-qhov ntsuas qhov ntsuas qhov ntsuas ntawm qhov ntsuas kub qis dua.
| Qib zoo | Phosphorus, max | Sulfur, max | Impact test |
|---|---|---|---|
| Q235A | 0.045 % | 0.050 % | Tsis xav tau |
| Q235B | 0.045 % | 0.045 % | 27 J ntawm ntxiv 20 degrees Celsius |
| Q235C | 0.040 % | 0.040 % | 27 J ntawm 0 ° C |
| Q235D | 0.035 % | 0.035 % | 27 J ntawm rho tawm 20 degrees Celsius |
Q235B yog qib feem ntau txiav txim rau cov yeeb nkab welded thiab cov khoom siv dav dav, vim tias chav - qhov ntsuas kub ntawm qhov ntsuas kub muab qhov yooj yim lav ntawm qhov hnyav ntawm tus nqi ntxiv me ntsis. Qib C thiab D yog tshwj tseg rau qis- kev pabcuam kub, qhov chaw tawg yog qhov kev txhawj xeeb txog kev tsim qauv.
Q235A thiab SS400: Kev lag luam sib npaug
Q235A belongs rau GB / T 700, thaum SS400 yog txhais los ntawm JIS G 3101 hauv Nyiv. Lawv cov txiaj ntsig thiab lub zog tensile sib tshooj sib tshooj zoo sib xws thiab ob qho tib si raug kho raws li kev lag luam sib npaug, tab sis qhov kev lees paub txawv ntawm txoj hauv kev tseem ceeb. Q235A qhia txog kev txwv rau cov pa roj carbon, manganese, phosphorus thiab sulfur tab sis tsis xav tau Charpy cuam tshuam kev sim. SS400 tsis kho cov tshuaj muaj pes tsawg leeg; nws guarantees mechanical zog, thiab chemistry tau pom zoo ntawm tus neeg muag khoom thiab cov neeg yuav khoom. Tus neeg yuav khoom hloov ib qho rau lwm tus yuav tsum xyuas seb qhov twg lav qhov tsim tau tso siab rau.
St37 thiab Hloov mus rau EN 10025
St37 yog ib qho qub German tsim los ntawm DIN 17100, tus qauv tam sim no feem ntau hloov los ntawm EN 10025. St37 yog ib qho tsis yog- alloy zoo cov qauv hlau, hauv lwm lo lus me me carbon steel: nws cov khoom yog los ntawm cov ntsiab lus carbon nrog tsuas yog me me tso cai ntxiv ntawm silicon thiab manganese, thiab nws tsis muaj cov ntsiab lus ntawm cov hlau tsis zoo li chromium b. nws yog hlau alloy. Nws qhov tsawg kawg nkaus tawm lub zog ntawm 235 MPa ntais ntawv Q235, thiab lub zog tensile implied los ntawm lub npe, 370 MPa yam tsawg kawg nkaus, zaum hauv Q235 tensile ntau. Hauv kev xyaum tam sim no ib daim duab qub uas hu rau St37 feem ntau txhais rau S235JR raws li EN 10025-2, lossis rau Q235B qhov twg Suav tus qauv tswj hwm.
Yeeb Nkab Cov Ntawv thiab Cov Ntawv Thov Kev Siv
Hluav taws xob kuj welded yeeb nkab- qhov kev xaiv zoo tshaj plaws rau Q235B thiab Q275 dej, roj thiab cov qauv raj hauv cov kab me me thiab nruab nrab.
Kauv submerged arc welded yeeb nkab- siv rau loj - txoj kab uas hla dej mains, piling thiab structural yeeb nkab nyob rau hauv Q235B los yog Q275.
Seamless yeeb nkab- xaiv qhov twg xav tau ib phab ntsa txuas ntxiv los yog qhov twg qhov loj me poob sab nraum qhov welded ntau.
Tej hauj lwm– lub tsev thav duab, cov kav hlau txais xov, kev thaiv txoj kev, cov tsev cog khoom, qis - cov kab dej siab thiab cov khoom siv dav dav.
Cov lus nug nquag
Q: Dab tsi yog qhov txawv ntawm Q235 thiab Q275?
Qhov tsawg kawg nkaus tawm lub zog: 235 MPa rau Q235 tawm tsam 275 MPa rau Q275. Q275 kuj tseem muaj qhov tensile ntau dua thiab cov ntsiab lus carbon ntau dua, yog li nws muaj zog dua tab sis me ntsis ductile thiab me ntsis nyuaj rau vuam.
Q: Puas tuaj yeem siv Q235A hloov SS400?
Hauv ntau daim ntawv thov kev tsim kho ob qho tib si sib hloov tau, tab sis qhov kev lees paub tsis zoo ib yam, vim tias Q235A tswj cov chemistry yam tsis muaj kev sim cuam tshuam thaum SS400 tswj cov khoom siv kho tshuab nrog chemistry pom zoo nyias. Qhov tshwj xeeb uas tswj qhov project txiav txim siab.
Q: B hauv Q235B txhais li cas?
Nws yog qib zoo. Q235B muaj cov phosphorus thiab sulfur nruj dua li Q235A thiab yuav tsum raug kuaj nrog 27 J yam tsawg kawg nkaus Charpy V-notch zog ntawm ntxiv 20 degrees Celsius, uas ua rau nws haum rau welded lug ntawm ambient kub.
Q: Puas yog St37 yog carbon steel?
Yog lawm. St37 raug cais raws li cov khoom tsis yog- alloy zoo cov qauv hlau, los yog cov pa roj carbon me me, nrog cov khoom tau los ntawm cov pa roj carbon ntau thiab tsuas yog tso cai me me ntawm silicon thiab manganese.
Q: Qib twg yuav tsum tau teev rau cov yeeb nkab hauv huab cua txias?
Rau qis - qhov kev pab cuam kub qhov zoo qib tseem ceeb tshaj li qib zog, yog li Q235C lossis Q235D, kuaj ntawm 0 degrees lossis rho tawm 20 degrees Celsius, feem ntau teev tsis yog Q235B.
Q: Puas yog cov khoom muaj txiaj ntsig zoo ib yam rau txhua phab ntsa tuab?
Tsis yog GB / T 700 teeb tsa qis qis qis qis zog raws li qhov tuab nce, yog li tus nqi siv yuav tsum tau nyeem los ntawm lub rooj rau qhov tseeb thickness raug txiav txim.
