q 355 ua(Suav GB / T 1591-2018 tus qauv) thiabS355 hlau(Tebchaws Europe EN 10025-2 tus qauv) yog ob lub ntiaj teb tseem ceeb siab -lub zog qis-alloy (HSLA) cov qauv hlau nrog ze li cov khoom siv kho tshuab zoo ib yam thiab cov ntawv thov sib hloov tau hauv ntau qhov xwm txheej. Cov kev sib txawv tseem ceeb nyob hauv lawv cov qauv hauv paus chiv keeb, cov ntsiab lus tshuaj muaj pes tsawg leeg, thiab kev faib cov qib toughness, thaum lawv lub zog tawm los, tensile kev ua tau zoo, thiab kev siv tau zoo sib xws - ua rau lawv xaiv cov kev xaiv saum toj kawg nkaus rau kev tsim kho kev hla ciam teb, tshuab, thiab cov phiaj xwm choj. Rau kev yuav khoom thoob ntiaj teb thiab kev hloov pauv engineering, kev nkag siab txog lawv qhov sib txawv me me kom ntseeg tau tias kev xaiv cov khoom siv tau zoo thiab ua raws li qhov project.
Q355 steel thiab S355 steel yog ob qho tib si dav siv hauv kev thauj khoom -cov kabmob cov qauv, ua tsaug rau lawv cov weldability zoo heev, tus nqi- ua tau zoo, thiab sib npaug zog- rau- qhov hnyav piv. Raws li kev hloov kho tshiab rau Q345 steel, Q355 tau dhau los ua cov pob txha ntawm Tuam Tshoj txoj kev lag luam steel, thaum S355 yog qib HSLA tseem ceeb hauv Tebchaws Europe thiab ntau qhov haujlwm thoob ntiaj teb. Thaum lawv feem ntau suav hais tias yog qhov sib npaug ncaj qha, lawv cov qauv- cov kev cai tshwj xeeb thiab qib subdivisions yuav tsum tau ua tib zoo sib xws kom tsis txhob muaj kev pheej hmoo ntawm engineering.
Q355 Hlau
Q355 steel yog siab -lub zog qis- alloy structural steel txhais los ntawmSuav teb tus qauv GB / T 1591-2018. Nws hloov lub qub Q345 steel qib, nrog rau "Q" sawv rau lub zog tawm los thiab "355" sawv cev rau qhov tsawg kawg nkaus yield zog ntawm 355 MPa rau thicknesses tsawg dua los yog sib npaug rau 16 hli. Q355 steel yog tsim los rau cov haujlwm hauv tsev thiab thoob ntiaj teb, hais txog tus nqi- kev ua tau zoo thiab hloov tau mus rau ntau yam txheej txheem fabrication, ua rau nws siv ntau tshaj plaws HSLA steel hauv Tuam Tshoj txoj kev tsim kho, choj, thiab tshuab kev lag luam.
S355 hlau
S355 steel yog tus qauv European HSLA cov qauv hlau tau teev tseg hauvTS EN 10025-2(European Committee for Standardization). Tus "S" qhia txog cov qauv hlau, thiab "355" qhia qhov tsawg kawg nkaus lub zog ntawm 355 MPa rau thicknesses tsawg dua los yog sib npaug rau 16 hli. S355 yog qib thoob ntiaj teb lees paub, dav siv nyob rau hauv cov teb chaws Europe, thiab siv hauv cov haujlwm thoob ntiaj teb vim nws cov kev tswj xyuas nruj thiab cov qauv ntsuas kev ua tau zoo.
Cov ntsiab lus sib piv ntawm Mechanical Properties
Cov khoom siv hluav taws xob ntawm Q355 steel thiab S355 steel yog ze li qub, uas yog lub hauv paus rau lawv qhov kev hloov pauv. Qhov sib txawv me ntsis yog feem ntau cuam tshuam rau hauv tensile lub zog ntau yam thiab cuam tshuam rau kev ntsuas toughness. Hauv qab no yog cov lus sib piv ntawm cov ntsuas qhov tseem ceeb (rau thickness Tsawg dua lossis sib npaug li 16 hli):
|
Mechanical Indicator |
Q355 Steel (GB/T 1591-2018) |
S355 Hlau (EN 10025-2) |
Ntsiab Lus |
|---|---|---|---|
|
Yam tsawg kawg nkaus Yield Strength |
Ntau dua lossis sib npaug li 355 MPa |
Ntau dua lossis sib npaug li 355 MPa |
Zoo tib yam rau daim hlau nyias (tsawg dua lossis sib npaug li 16 hli); txo me ntsis nrog nce thickness |
|
Tensile zog |
450-630 MPa |
470-630 MPa |
S355 muaj lub zog tensile tsawg dua me ntsis |
|
Elongation |
Ntau dua lossis sib npaug li 21% |
Ntau dua lossis sib npaug li 21% |
Ua kom zoo ib yam, ua kom zoo ductility |
|
Qhov ntom |
7.85 g / cm³ |
7.85 g / cm³ |
Ib yam li cov qauv carbon thiab qis - alloy structural steels |
Qib Subdivisions & Toughness Differences
Ob qho Q355 thiab S355 tau muab faib ua cov qib sib txawv raws li qis- qhov kub thiab txias cuam tshuam, uas yog qhov sib txawv tseem ceeb tshaj plaws ntawm ob koob. Cov qhab-nees sib raug rau qhov sib txawv ntawm qhov ntsuas kub thiab cov kev xav tau ntawm lub zog, txiav txim siab lawv qhov kev siv tau hauv ib puag ncig sib txawv.
3.1 Q355 Steel Qib (GB/T 1591-2018)
Q355B: Kev ntsuas cuam tshuam ntawm 20℃(chav kub), qhov cuam tshuam tsawg kawg nkaus lub zog Ntau dua lossis sib npaug rau 34J (ntev ntev). Haum rau cov qauv hauv tsev, cov tsev dav dav, thiab tsis yog - cov khoom tseem ceeb.
Q355C: Kev ntsuam xyuas cuam tshuam ntawm 0 degree, yam tsawg kawg nkaus lub zog loj dua lossis sib npaug rau 34J (ntev). Haum rau cov qauv sab nraum zoov, txuas hniav, thiab cov cheeb tsam me me.
Q355D: Kev ntsuas cuam tshuam ntawm -20 degree, qhov cuam tshuam tsawg kawg nkaus lub zog Ntau dua lossis sib npaug rau 34J (ntev). Haum rau cov cheeb tsam txias heev, cov hlab ntsha siab, thiab cov qauv thauj khoom dynamic.
3.2 S355 Steel Qib (EN 10025-2)
S355 JR: Kev ntsuas cuam tshuam ntawm 20 degree, qhov cuam tshuam tsawg kawg nkaus lub zog Ntau dua lossis sib npaug rau 34J. Direct sib npaug rau Q355B.
S355 YOG: Kev ntsuas cuam tshuam ntawm 0 degree, qhov cuam tshuam tsawg kawg nkaus Lub zog Ntau dua lossis sib npaug rau 34J. Direct sib npaug rau Q355C.
S355J2: Kev ntsuas cuam tshuam ntawm -20 degree, qhov cuam tshuam tsawg kawg nkaus lub zog Ntau dua lossis sib npaug rau 34J. Direct sib npaug rau Q355D.
S355J2+N: Kev kho cua sov li qub, cuam tshuam kev ntsuas ntawm -20 degree. Kev xaiv rau tej yaam num uas yuav tsum tau muaj kev ruaj ntseg ntau dua.
Key Takeaway: Cov qhab-nees xa mus ncaj qha: Q355B ↔ S355JR, Q355C ↔ S355JO, Q355D ↔ S355J2. Qhov no yog -rau- ib qho kev sib txuam ua kom muaj kev nyab xeeb hloov pauv hauv feem ntau ntawm engineering scenarios.
Chemical Composition Sib txawv
Cov tshuaj muaj pes tsawg leeg ntawm Q355 thiab S355 steel yog zoo sib xws, nrog me ntsis sib txawv nyob rau hauv impurity ntsiab txwv thiab alloy cov ntsiab lus, uas tsis cuam tshuam rau lawv mechanical kev ua tau zoo los yog interchangeability. Hauv qab no yog kev sib piv ntawm cov ntsiab lus tseem ceeb (tsawg dua lossis sib npaug rau %, rau qib B / C / D):
|
Element |
Q355 Hlau |
S355 hlau |
|---|---|---|
|
Cov pa roj carbon (C) |
Tsawg dua lossis sib npaug rau 0.24 (B), Tsawg dua lossis sib npaug rau 0.20 (C / D) |
Tsawg dua lossis sib npaug rau 0.24 (JR / JO), Tsawg dua lossis sib npaug rau 0.22 (J2) |
|
Manganese (Mn) |
Tsawg dua lossis sib npaug li 1.60 |
Tsawg dua lossis sib npaug li 1.60 |
|
Phosphorus (P) |
Tsawg dua lossis sib npaug rau 0.035 (B), Tsawg dua lossis sib npaug rau 0.030 (C / D) |
Tsawg dua lossis sib npaug rau 0.035 (JR), Tsawg dua lossis sib npaug rau 0.030 (JO / J2) |
|
Sulfur (S) |
Tsawg dua lossis sib npaug rau 0.035 (B), Tsawg dua lossis sib npaug rau 0.030 (C), Tsawg dua lossis sib npaug rau 0.025 (D) |
Tsawg dua los yog sib npaug rau 0.035 (JR/JO/J2) |
|
Nickel (Ni) / Chromium (Cr) |
Tsawg dua lossis sib npaug li 0.30 txhua |
Tsawg dua lossis sib npaug li 0.30 txhua |
Lus Cim: Ob leeg Q355 thiab S355 muaj qhov sib npaug ntawm cov pa roj carbon tsawg (CEV Tsawg dua lossis sib npaug rau 0.45%), kom ntseeg tau zoo weldability. Preheating tsis tas yuav tsum tau thickness tsawg dua los yog sib npaug rau 35mm ntawm ambient kub Ntau tshaj los yog sib npaug rau 0℃rau ob qib.
Daim Ntawv Thov: Hloov pauv tau tab sis Lub Hom Phiaj
Vim lawv cov kev ua tau zoo sib xws, Q355 steel thiab S355 steel yog sib hloov tau nyob rau hauv feem ntau cov qauv siv. Kev xaiv ntawm lawv feem ntau yog nyob ntawm qhov project qhov chaw, tus qauv yuav tsum tau ua, thiab tus nqi yuav khoom. Nov yog lawv cov xwm txheej ntawm kev thov:
5.1 Cov Ntawv Thov Kev Sib Txuas (Kev Hloov pauv tau)
Kev tsim kho: Siab- nce lub tsev kab / kab teeb, cov chaw tsim khoom lag luam, loj- thaj chaw ntau pob, thiab tshav dav hlau terminals.
Txuas hniav: Txoj kev loj / railway choj lub ntsiab girders, lawj daim hlau, thiab cov qauv kev txhawb nqa.
Machinery: Cua turbine yees, crane booms, mining machinery, thiab hnyav - lub tsheb chassis.
Zog & Petrochemical: Cov hlab ntsha siab, cov tso tsheb hlau luam, thiab cov chaw tsim hluav taws xob txhawb nqa.
5.2 Lub Hom Phiaj Daim Ntawv Thov
Q355 Hlau: Nyiam rau tej yaam num hauv Suav teb thiab cov teb chaws Asia, qhov twg yuav tsum muaj cov qauv GB/T. Nws muab cov nqi zoo dua -kev ua tau zoo rau cov haujlwm loj- nplai hauv tsev, nrog rau cov saw hlau ua tiav ntawm cov phaj, coils, ntu, thiab cov kav dej.
S355 hlau: Txaus siab rau cov haujlwm European thiab kev sib tw thoob ntiaj teb uas xav tau EN cov qauv. Nws tau lees paub dav hauv kev lag luam thoob ntiaj teb, ua rau nws zoo tagnrho rau kev hla -txheej txheem engineering thiab xa tawm- cov phiaj xwm taw qhia.
Cov lus nug nquag nug (FAQ)
1. Puas yog Q355 steel thiab S355 steel sib npaug?
Yog lawm, lawv yuav luag tag nrho sib npaug hauv cov khoom siv kho tshuab thiab kev siv. Qhov sib txawv tsuas yog qhov sib txawv me me ntawm cov tshuaj muaj pes tsawg leeg thiab cov qauv keeb kwm, uas tsis cuam tshuam rau lawv qhov kev hloov pauv hauv feem ntau cov haujlwm ua haujlwm.
2. Q355B puas tuaj yeem hloov S355JR ncaj qha?
kiag li. Q355B thiab S355JR muaj tib chav- qhov kub thiab txias ntawm qhov hnyav (20 degree) thiab cov khoom siv kho tshuab, ua rau lawv hloov ncaj qha rau cov qauv sab hauv tsev thiab sab nraum zoov.
3. Qhov txawv ntawm Q355D thiab S355J2 yog dab tsi?
Lawv yog cov sib npaug ncaj qha, ob qho tib si tsim los rau qis - qhov kub thiab txias (-20℃cuam tshuam qhov ntsuas). Qhov sib txawv me ntsis tsuas yog nyob rau hauv cov ntsiab lus sulfur txwv (Q355D Tsawg dua lossis sib npaug rau 0.025%, S355J2 Tsawg dua lossis sib npaug li 0.035%), uas tsis cuam tshuam rau kev ua haujlwm.
4. Qhov twg yog tus nqi ntau dua -zoo: Q355 lossis S355?
Q355 yog tus nqi ntau dua -zoo rau cov haujlwm hauv Suav teb thiab cov cheeb tsam nyob ze vim yog cov khoom siv hauv zos. S355 tej zaum yuav muaj tus nqi siab dua hauv kev lag luam Esxias tab sis muaj kev sib tw ntau dua hauv Tebchaws Europe.
5. Puas yog Q355 thiab S355 xav tau cov txheej txheem vuam sib txawv?
Tsis yog. Ob leeg muaj qhov sib npaug ntawm cov pa roj carbon monoxide thiab weldability. Cov txheej txheem vuam tib yam (piv txwv li, arc vuam, roj vuam) tuaj yeem siv rau ob qib, tsis muaj kev hloov kho tshwj xeeb.
6. S355 puas tuaj yeem siv rau hauv Suav tej yaam num?
Yog lawm, tsuav yog qhov project tsis qhia meej txog GB / T cov qauv. S355 tuaj yeem siv rau hauv Suav cov haujlwm yog tias nws ua tau raws li cov kev xav tau ntawm kev tsim khoom.
7. Puas yog Q355 haum rau cov haujlwm European?
Yog lawm, Q355 tuaj yeem siv rau hauv cov haujlwm European yog tias nws tau lees paub raws li EN 10025-2 tus qauv (sib npaug rau S355). Feem ntau Q355 cov neeg xa khoom tuaj yeem muab daim ntawv pov thawj thib peb rau cov haujlwm thoob ntiaj teb.
8. Cov ntaub ntawv ntawm Q355 thiab S355 steel yog dab tsi?
Ob qib muaj nyob rau hauv daim hlau, coils, kub- dov seem (H-beams, I-beams, channel steels), seamless kav, thiab welded kav, txhawb customization ntawm thickness, dav, thiab ntev rau ntau yam project xav tau.
Q355 steel thiab S355 steel yog txhim khu kev qha, siab -kev ua tau zoo HSLA cov qauv hlau nrog ncaj ncaj sib npaug thiab cov ntawv sib hloov tau.Kev nkag siab txog lawv cov qib sib piv thiab qhov sib txawv me me yuav pab txhim kho kev xaiv cov khoom zoo, txo tus nqi yuav khoom, thiab ua kom muaj kev ua raws li qhov project.Txawm hais tias koj xaiv Q355 lossis S355, xaiv cov qib toughness kom raug raws li qhov project ib puag ncig yog tus yuam sij rau kev nyab xeeb ntawm cov qauv.