Q355yog Suav cov qauv steel qib uas piv rau Q345 tab sis muaj lub zog zoo dua. Nws yog qee zaum hu ua Q355B lossis Q355D, raws li nws cov tshuaj pleev ib ce thiab cov khoom siv zoo.q 355 uayog npaj kom muaj qhov tsawg kawg nkaus yield zog ntawm355 MPa rau, uas yog ntau tshaj qhov345 MPa rauyield zog ntawmq 345 ua.
Q355 steel tau nce kev ua tau zoo thiab feem ntau yog siv rau hauv cov qauv siv uas xav tau ntau zog. Nws yog siv nyob rau hauv kev tsim kho kev lag luam los fabricate beams, kab, thiab lwm yam load- bearing lug. Q355 steel kuj tsim nyog rau kev tsim cov khoom siv, txuas hniav, thiab cov qauv sab nrauv.
Qib Q355 steel
Q355 steel yog qib siab -lub zog steel qib uas feem ntau siv hauv ntau yam lag luam thiab kev siv. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias tsis muaj "qib" ntawm Q355 steel vim nws tsis raug cais los ntawm kev siv cov qauv qib ib txwm muaj xws li Q235 lossis Q345. Hloov chaw, Q355 feem ntau yog categorized raws li nws cov tshuaj muaj pes tsawg leeg thiab cov khoom siv tshuab.
Muaj ntau qhov sib txawv lossis hom Q355 steel, xws li Q355B, Q355C, Q355D, thiab Q355E, txhua tus muaj nws tus kheej tshwj xeeb muaj pes tsawg leeg thiab cov khoom. Cov kev hloov pauv no yog qhov txawv ntawm cov ntsiab lus xws li cov ntsiab lus carbon, cov ntsiab lus alloying ntxiv, thiab cov txheej txheem kho cua sov tshwj xeeb.
Q355B
Hom Q355 steel no yog tus cwj pwm los ntawm cov ntsiab lus carbon ntau dua, feem ntau yog los ntawm0.20%rau0.25%. Nws muaj qhov zoo weldability thiab formability, ua rau nws haum rau cov qauv siv uas yuav tsum tau muaj zog thiab toughness. Q355B feem ntau yog siv rau hauv kev tsim vaj tsev, txuas hniav, thiab tshuab.
Q355C
Q355C steel muaj cov pa roj carbon ntau ntxiv, feem ntau yog los ntawm 0.18%rau0.22%. Qhov no variant muab kev txhim kho lub zog thiab hardness piv rau Q355B. Q355C feem ntau yog siv rau hauv cov ntawv thov uas yuav tsum muaj kev thauj khoom ntau dua -cov kabmob muaj peev xwm, xws li cov tshuab hnyav, cranes, thiab cov qauv sab nrauv.
Q355D
Q355D steel yog hom Q355 nrog cov khoom siv kho kom zoo. Nws feem ntau muaj cov ntsiab lus carbon ntau dua thiab cov ntsiab lus alloying ntxiv xws li niobium, vanadium, lossis titanium. Q355D muaj lub zog zoo, toughness, thiab cuam tshuam tsis kam, ua rau nws tsim nyog rau kev thov cov qauv siv. Nws yog feem ntau ua haujlwm nyob rau hauv kev tsim kho cov choj, siab - cov tsev nce siab, thiab cov khoom vaj tse uas raug rau cov khoom thauj.
Q355E
Q355E steel yog lwm qhov sib txawv ntawm Q355 uas yog tsim los kom muaj cov khoom zoo dua qub. Nws nquag koom nrog cov hlau alloying xws li niobium, vanadium, lossis titanium kom nws lub zog thiab hardness. Q355E feem ntau yog siv rau hauv cov ntawv thov uas xav tau lub zog siab thiab ua haujlwm rau ib puag ncig, xws li cov chaw sab nrauv, lub zog xa hluav taws xob, thiab cov khoom siv hnyav -.
Mechanical Properties ntawm Q355 Steel
| Qib | Yield zog (MPa) | Tensile zog (MPa) | Elongation (%) | Impact kub |
| Q355B | Ntau dua lossis sib npaug rau 355 | 470–630 | Ntau dua lossis sib npaug 22 | 20 degree |
| Q355C | Ntau dua lossis sib npaug rau 355 | 470–630 | Ntau dua lossis sib npaug 22 | 0 degree |
| Q355D | Ntau dua lossis sib npaug rau 355 | 470–630 | Ntau dua lossis sib npaug 22 | -20 degree |
| Q355E | Ntau dua lossis sib npaug rau 355 | 470–630 | Ntau dua lossis sib npaug 22 | -40 degree |
Q355 Chemical Composition (GB/T 1591)
Hauv qab no yog cov tshuaj muaj pes tsawg leeg ntawm Q355 raws li GB / T 1591-2018(rau thickness Tsawg dua lossis sib npaug li 16 hli, qhov siab tshaj plaws tshwj tsis yog sau tseg):
| Lub ntsiab | Q355B | Q355C | Q355D | Q355E |
| C | Tsawg dua lossis sib npaug li 0.24% | Tsawg dua lossis sib npaug li 0.22% | Tsawg dua lossis sib npaug li 0.20% | Tsawg dua lossis sib npaug li 0.18% |
| Si | Tsawg dua lossis sib npaug li 0.55% | Tsawg dua lossis sib npaug li 0.55% | Tsawg dua lossis sib npaug li 0.55% | Tsawg dua lossis sib npaug li 0.55% |
| Mn | Tsawg dua lossis sib npaug li 1.60% | Tsawg dua lossis sib npaug li 1.60% | Tsawg dua lossis sib npaug li 1.60% | Tsawg dua lossis sib npaug li 1.60% |
| P | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug li 0.030% | Tsawg dua lossis sib npaug li 0.025% |
| S | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug li 0.030% | Tsawg dua lossis sib npaug li 0.020% |
| Nb+V+Ti | Tsawg dua lossis sib npaug li 0.12% | Tsawg dua lossis sib npaug li 0.12% | Tsawg dua lossis sib npaug li 0.12% | Tsawg dua lossis sib npaug li 0.12% |
Cov qauv sib npaug ntawm Q355 steel
Q355 yog tus neeg ua tiav rau Q345koom npe nrov hauv kev hloov kho tshiab GB / T 1591 tus qauv (2018 kho dua tshiab), muab cov khoom me ntsis txhim kho thiab ua kom zoo dua qub nrog cov qauv thoob ntiaj teb.
Teb chaws Europe (EN):S355(piv txwv li, S355J2 yog kwv yees sib npaug rau Q355B; S355K2+N yog roughly sib npaug rau Q355D). Qhov no yog qhov sib npaug ze tshaj plaws
Asmeskas (ASTM):A572 Qib 50(Yield Yam tsawg kawg nkaus 50 ksi=~ 345 MPa) yog qhov sib npaug tshaj plaws, txawm tias lub zog sib txawv me ntsis. ASTM A992 (rau cov qauv duab) kuj feem ntau sib piv.
Cov ntawv thov tseem ceeb ntawm Q355 HSLA Steel Phaj
Cov qauv tsim rau lub tsev (kev lag luam, kev lag luam, siab -nce)
- Cov choj
- Towers (kev sib txuas lus, kev sib txuas lus)
- cranes thiab lifting khoom
- Heavy machinery thiab cov khoom siv mining
- Cov tsheb tsim kho
- Nkoj (cov qauv hull xav tau lub zog siab dua li cov phaj hull zoo tib yam)
- Cov hlab ntsha siab (cov qib tshwj xeeb ua tau raws li cov qauv ntxiv)
- Cov yeeb nkab racks, platforms, thiab lwm yam steelwork.
Yuav Ua Li Cas Xaiv Q355B/C/D/E
| Daim ntawv thov Scenario | Pom zoo Qib |
|---|---|
| Kev tsim kho dav dav | Q355B |
| Vuam- tsom cov qauv | Q355C |
| Sab nraum zoov / txias cheeb tsam | Q355D |
| Tsis tshua muaj kub | Q355E |
Qhov txawv tseem ceeb
- E- qib siv hauvlow-kub engineering & tseem ceeb welded qauv
- B → Eqhia tau hais tias txhim kho kev cuam tshuam toughness
- Tsab ntawv txhais covqhov kub thiab txias rau Charpy V-qhov ntsuas qhov cuam tshuam
- Kev sib xyaw yog zoo sib xws; toughness thiab kev pabcuam kub sib txawv
Hauv Summary
Q355 yog ntau yam, siab - lub zog steel qauv los ntawm Tuam Tshoj, muab qhov zoo sib npaug ntawm lub zog, ductility, weldability, thiab cuam tshuam toughness. Nws cov khoom tshwj xeeb (tshwj xeeb tshaj yog cuam tshuam rau qhov kub thiab txias) yog txhais los ntawm nws qib (B, C, D, E). Nws yog lub hauv paus hlau rau kev thov cov qauv siv thoob plaws ntau qhov kev lag luam hauv Suav teb thiab tau lees paub thoob ntiaj teb los ntawm nws qhov sib npaug rau S355 steel.
Dab tsi yog cov khoom siv Q355?
Q355 steel yog aSuav low alloy high zog structural steel, uas hloov Q345, cov khoom ceev yog 7.85 g / cm3. Raws li GB/T 1591 -2018, Q355 muaj 3 theem zoo: Q355B, Q355C thiab Q355D.
Q355 steel sib npaug yog dab tsi?
Q355 steel feem ntau suav hais tias sib npaug rau EN S355 cov qauv hlau hauv cov ntsiab lus ntawm kev tawm dag zog thiab kev ua haujlwm txhua yam. Qhov ze tshaj European sib npaug yogS355JR, S355J0, thiab S355J2, nyob ntawm qhov cuam tshuam qhov ntsuas kub xav tau.
S355 British Standard yog dab tsi?
S355 steel yog aqis carbon steel uas nws specifications muaj siab yield zog. Qhov nruab nrab qhov tsawg kawg nkaus tawm los rau S355 steel yog 355 N / mm² muab nws lub npe: S355. BS EN 10025 S275 & S275JR supercedes BS4360 43A thiab 43B. S355 daim ntawv / phaj kuj tuaj yeem raug nplaim taws txiav rau qhov profile ntawm kev thov.
Dab tsi yog qhov spec ntawm Q355?
Q355 steel yog cov qauv hlau nrog ayield zog ntawm 345 MPa thiab tensile zog ntawm 450 MPa. Nws muaj kev ua tau zoo heev thiab lub zog compressive, uas tuaj yeem siv los tsim cov khoom siv siab - cov pa roj siab siab uas muaj tsawg dua 500 litres. Q355 kuj muaj cov txheej txheem tiv thaiv xeb.
Qhov txawv ntawm S355 thiab Q355 yog dab tsi?
Q355 thiab S355 tsis yog cov qauv zoo ib yam, tab sis lawv ua haujlwm sib npaug rau feem ntau cov qauv siv. Ob leeg muaj qhov tsawg kawg nkaus lub zog ntawm 355 MPa thiab zoo sib xws tensile zog ntau yam. Qhov sib txawv tseem ceeb yog nyob rau hauv cov qauv specifications, tshuaj lom neeg muaj pes tsawg leeg txwv, thiab kev xa khoom
Q355B steel qauv yog dab tsi?
Cov qauv tsim khoom
Q355B steel yog tsim nyob rau hauv cov kev cai ntawm lubGB/T 1591-2018tus qauv, uas tswj hwm cov khoom siv kho tshuab, tshuaj lom neeg muaj pes tsawg leeg, thiab kev xa khoom ntawm siab -lub zog qis- alloy structural steels hauv Suav teb.
Qhov txawv ntawm A36 thiab Q355B yog dab tsi?
A36 thiab Q355B yog ob qho tib si qib steel qauv, tab sisA36 yog tus qauv qub Asmeskas (ASTM A36) thaum Q355B yog tus qauv Suav tshiab. Q355B feem ntau muaj lub zog ntau dua thiab muaj peev xwm ua tau zoo dua hauv qee qhov kev siv, tshwj xeeb tshaj yog qhov xav tau muaj zog ntau dua.
