q 355 uayog asiab-lub zog qis- alloy (HSLA) cov qauv hlautxhais los ntawm Suav GB / T 1591-2018 tus qauv, ua haujlwm hloov kho tshiab rau qib Q345 ib txwm muaj. Lub "Q" sawv cev rau lub zog tawm los, thiab "355" txhais tau tias aYam tsawg kawg nkaus tawm lub zog ntawm 355 MParau thicknesses Tsawg dua los yog sib npaug li 16 hli. Raws li HSLA steel siv dav tshaj plaws hauv kev tsim kho niaj hnub thiab kev tsim vaj tsev, Q355 steel sib npaug tshwj xeeb kev ua haujlwm, tus nqi -kev ua tau zoo, thiab kev ua haujlwm, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev thauj khoom- cov kabmob thoob ntiaj teb. Ntawm GNEE STEEL, peb muab cov khoom lag luam zoo Q355 steel (phaj, coils, ntu, kav dej) nrog kev tswj xyuas nruj, ua kom muaj kev ua raws li cov qauv thoob ntiaj teb rau koj cov haujlwm tseem ceeb.
Chemical Composition (GB/T 1591-2018, Tsawg dua lossis sib npaug rau %)
| Element | C | Si | Mn | P | S | Cr | Ni | Cu | N |
|---|---|---|---|---|---|---|---|---|---|
| Q355B | 0.24 | 0.55 | 1.60 | 0.035 | 0.035 | 0.30 | 0.30 | 0.40 | 0.012 |
| Q355C | 0.20 | 0.55 | 1.60 | 0.030 | 0.030 | 0.30 | 0.30 | 0.40 | 0.012 |
| Q355D | 0.20 | 0.55 | 1.60 | 0.030 | 0.025 | 0.30 | 0.30 | 0.40 | 0.012 |
Mechanical Properties
Yield zog (MPa): Tsawg dua los yog sib npaug rau 16mm: Ntau dua lossis sib npaug rau 355; 16-40mm: Ntau dua lossis sib npaug rau 345; 40-63mm: Ntau dua lossis sib npaug rau 335; 63-80mm: Ntau dua lossis sib npaug rau 315; 100-150mm: Ntau dua lossis sib npaug rau 295; 150-200mm: Ntau dua lossis sib npaug rau 285; 200-250mm: Ntau dua lossis sib npaug rau 275
Tensile zogUa haujlwm siab: 450-630 MPa
Elongation: Ntau dua lossis sib npaug li 21%
Impact Toughness (Charpy V-notch, Ntau dua los yog sib npaug rau 34J longitudinal/27J transverse)Q355B ntawm 20 degree, Q355C ntawm 0 degree, Q355D ntawm -20 degree
Cov Qib tseem ceeb ntawm Q355 Steel
Q355 steel muaj peb qib zoo raws li qhov sib txawv ntawm qhov kub thiab txias thiab toughness:
Q355B: Qib pib nrog kev cuam tshuam ntawm chav tsev kub (20 degree), zoo tagnrho rauCov qauv hauv tsev, cov tsev dav dav, thiab tsis yog{0}} cov khoom tseem ceeb.
Q355C: Txhim kho qis-kub toughness (0℃cuam tshuam kuaj), haum rausab nraum cov qauv, txuas hniav, thiab cov khoom siv nyob rau hauv cov cheeb tsam me me.
Q355D: Zoo heev low -kub kev ua tau zoo (-20℃cuam tshuam kuaj), tsim rautxias-cov haujlwm hauv cheeb tsam, cov hlab ntsha siab, thiab cov qauv thauj khoom dynamic.
Kev siv tseem ceeb ntawm Q355 Steel
Q355 steel lub zog siab, weldability, thiab durability ua rau nws indispensable nyob rau hauv kev lag luam:
Kev tsim kho: High-nce lub tsev kab / kab teeb, cov chaw tsim khoom lag luam, cov chaw loj -span stadiums, thiab tshav dav hlau terminals.
Cov choj: Txoj kev loj / tsheb ciav hlau choj lub ntsiab girders, lawj daim hlau, thiab cov qauv kev txhawb nqa (xws li, Hong Kong-Zhuhai-Makao Choj daim ntawv thov).
Machinery & Khoom hnyav: Cua turbine towers, mining machinery, crane booms, thiab heavy-duty car chassis.
Zog & Petrochemical: Cov hlab ntsha siab, cov tso tsheb hlau luam, cov chaw tsim hluav taws xob txhawb nqa, thiab cov kav xa hluav taws xob.
Shipbuilding & Offshore: Lub nkoj hull cov qauv, cov khoom siv sab nrauv sab nrauv, thiab cov khoom siv hauv hiav txwv.
Qhov zoo ntawm Q355 Steel
Siab zog - rau - Qhov hnyav piv: 50% siab zog yield zog dua Q235 me me steel, txo cov steel siv los ntawm 10-15% thiab txo cov qauv hnyav thiab cov nqi.
Weldability zoo heev: Tsawg carbon sib npaug (CEV) ua kom yooj yim vuam yam tsis muaj preheating rau thickness Tsawg dua los yog sib npaug rau 35 hli ntawm Greater dua los yog sib npaug rau 0 degree, simplifying fabrication.
Zoo Tsawg-Tsub Toughness: Q355C / D qib tswj kev cuam tshuam hauv qhov chaw txias, tiv thaiv kev puas tsuaj.
Tus nqi -Kev ua tau zoo: Sib npaug kev ua tau zoo nrog tus nqi sib tw, ua tau zoo dua cov qib txawv teb chaws xws li S355 thiab A572 Gr 50 hauv tus nqi.
International Equivalence: Txuas ncaj qha rau European S355JR, American ASTM A572 Gr 50, thiab Japanese SM490B/C, txhawb nqa kev ua raws li txoj haujlwm thoob ntiaj teb.
Q355 Hlau vs
Q355 vs Q355
Q355 vs Q235
Q355 vs S355JR
Q355 vs A572 Gr 50
| Qib | Yield zog (MPa) | Qhov tseem ceeb Advantage | Daim ntawv thov tseem ceeb |
|---|---|---|---|
| Q355 | Ntau dua lossis sib npaug rau 355 (tsawg dua lossis sib npaug li 16 hli) | Siab zog, zoo toughness | Load-cov kabmob, txuas hniav, tshuab |
| Q235 | Ntau dua lossis sib npaug rau 235 | Tus nqi qis, ua haujlwm yooj yim | General lug, scaffolding, guardrails |
| S355 JR | Ntau dua lossis sib npaug rau 355 | International kev lees paub | Ntiaj teb no kev tsim kho, European tej yaam num |
| A572 gr 50 | Ntau dua lossis sib npaug rau 345 | Siab zog, corrosion kuj | North American structural tej yaam num |
Cov lus nug nquag nug (FAQ)
1. Q355 steel yog dab tsi?
Q355 steel yog Suav HSLA structural steel qib. "Q" txhais tau tias muaj zog tawm los, "355" yog hais txog qhov tsawg kawg nkaus 355 MPa yield zog rau thickness Tsawg dua los yog sib npaug rau 16 hli, ib GB / T 1591-2018.
2. Qhov txawv ntawm Q355 thiab Q345 steel yog dab tsi?
Q355 yog qhov hloov kho dua tshiab ntawm Q345. q355a uaYam tsawg kawg nkaus tawm lub zog ntawm 355 MPa(vs. 345 MPa rau Q345), zoo dua qis-kub toughness, thiab nruj zog tshuaj muaj pes tsawg leeg txwv, hloov Q345 nyob rau hauv feem ntau niaj hnub tej yaam num.
3. Puas yog Q355 steel sib npaug rau S355?
Yog, Q355 steel yogncaj qha sib npaug rau European S355JR(EN 10025-2) thiab Asmeskas ASTM A572 Gr 50, nrog ze li cov khoom siv kho tshuab thiab kev siv, tsim nyog rau kev hloov pauv thoob ntiaj teb.
4. Dab tsi yog cov qauv ntawm Q355 steel?
GNEE STEEL muab Q355 steel hauvphaj, coils, kub- dov seem (H-beams, I-beams), seamless kav, thiab welded kav, customizable rau thickness, dav, thiab ntev yuav tsum tau.
5. Q355 steel puas tuaj yeem siv rau hauv cheeb tsam txias?
Yog lawm.Q355C (0℃cuam tshuam)thiabQ355D (-20℃cuam tshuam)Cov qib yog tsim los rau qhov chaw txias, ua kom ntseeg tau tias muaj kev ruaj ntseg thiab tiv thaiv kev tawg ntawm qhov kub thiab txias hauv qis -.
6. Dab tsi yog qhov ceev ntawm Q355 steel?
Qhov ntom ntawm Q355 steel yog7.85 g / cm³, ua raws li cov qauv carbon thiab qis- alloy steels rau kev suav cov txheej txheem engineering.
7. Puas yog Q355 steel xav tau preheating ua ntej vuam?
Rau feem ntau (thickness Tsawg dua lossis sib npaug li 35mm, ambient kub Ntau dua lossis sib npaug rau 0 degree),tsis xav tau preheating due to Q355's low carbon equivalent. Preheating is only required for thick plates (>35mm) lossis qis- qhov kub thiab txias (<0°C).
GNEE cov neeg koom tes
