Carbon Structural Steel Phaj yog dab tsi?
Carbon structural steel phajyog ib qho ntawm cov khoom siv dav siv hauv kev tsim kho thiab kev tsim vaj tsev vim nws lub zog zoo heev, weldability, thiab cov nqi ua haujlwm. Feem ntau muab raws li cov qauv xws liASTM A36 steel phaj, S355 steel phaj, thiabQ345 carbon steel phaj, nws yog qhov zoo tagnrho raukev tsim vaj tsev, txuas hniav, machinery fabrication, thiab industrial applications. Nrog rau kev sib xyaw ua ke ntawm kev ua haujlwm zoo thiab kev pheej yig, cov pa roj carbon steel phaj tau siv dav hauvCov qauv steel fabrication, hnyav khoom tsim, thiab infrastructure tej yaam num thoob ntiaj teb, ua rau lawv xaiv rau cov engineers thiab cov neeg cog lus nrhiav kev txhim khu kev qha thiab ruaj khov steel kev daws teeb meem.
Tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg ntawm carbon structural steel daim hlau txawv nyob ntawm seb qib, tab sis feem ntau suav nrog cov hauv qab no:
| Element | Cov ntsiab lus (%) | Muaj nuj nqi |
|---|---|---|
| Cov pa roj carbon (C) | 0.05 – 0.30 | Nce zog thiab hardness |
| Manganese (Mn) | 0.30 – 1.50 | Txhim kho lub zog thiab toughness |
| Silicon (Si) | Tsawg dua los yog sib npaug li 0.50 | Txhim kho deoxidation thiab lub zog |
| Phosphorus (P) | Tsawg dua los yog sib npaug li 0.04 | Tej zaum yuav ua kom brittleness yog tias ntau dhau |
| Sulfur (S) | Tsawg dua los yog sib npaug li 0.05 | Txhim kho machinability tab sis txo ductility |
👉 Nco tseg:Cov ntsiab lus qis dua cov pa roj carbon monoxide txhim kho weldability, thaum cov pa roj carbon ntau dua ua kom lub zog tab sis txo cov ductility.
Mechanical Properties Sib piv
| Qib | Yield zog (MPa) | Tensile zog (MPa) | Elongation (%) |
|---|---|---|---|
| ASTM A36 | Ntau dua lossis sib npaug li 250 | 400 – 550 | Ntau tshaj los yog sib npaug rau 20 |
| S235 | Ntau dua lossis sib npaug li 235 | 360 – 510 | Ntau dua lossis sib npaug li 26 |
| S355 | Ntau dua lossis sib npaug rau 355 | 470 – 630 | Ntau dua lossis sib npaug 22 |
| Q345 | Ntau dua lossis sib npaug rau 345 | 470 – 630 | Ntau tshaj los yog sib npaug rau 20 |
A36 vs Q235 vs S235 vs SS400
| Txuj | Qib | Cov qauv sib npaug | Hom Yield Strength (MPa) | Kev piav qhia |
|---|---|---|---|---|
| ASTM (USA) | A36 | EN S235 / GB Q235 | Ntau dua lossis sib npaug li 250 | General structural steel, zoo heev weldability |
| EN (Tebchaws Europe) | S235 JR | ASTM A36 / GB Q235 Cov Lus Qhia | Ntau dua lossis sib npaug li 235 | Basic structural applications |
| EN (Tebchaws Europe) | S275 JR | ASTM A283 Gr.C | Ntau dua lossis sib npaug li 275 | Lub zog nruab nrab ntawm cov qauv hlau |
| EN (Tebchaws Europe) | S355 JR | ASTM A572 / GB Q345 Cov Lus Qhia | Ntau dua lossis sib npaug rau 355 | High lub zog structural steel |
| ASTM (USA) | A572 Gr.50 | EN S355 / GB Q345 | Ntau dua lossis sib npaug rau 345 | High-lub zog qis- alloy structural steel |
| GB (Tuam Tshoj) | Q235B | ASTM A36 / EN S235 Cov Lus Qhia | Ntau dua lossis sib npaug li 235 | Siv dav siv hlau |
| GB (Tuam Tshoj) | Q345B | ASTM A572 / EN S355 Cov Lus Qhia | Ntau dua lossis sib npaug rau 345 | Kev siv lub zog muaj zog heev |
| JIS (Nyiv) | SIB 400 | ASTM A36 / EN S235 Cov Lus Qhia | Ntau dua lossis sib npaug li 245 | General - hom phiaj steel |
Yuav Ua Li Cas Xaiv Ntawm A36, Q235, S235 thiab SS400
| Cov txheej txheem | A36 (ASTM) | Q235 (GB) | S235 (EN) | SS400 (JIS) |
|---|---|---|---|---|
| Standard Region | USA / International | Tuam Tshoj | Teb chaws Europe | Nyiv / Asia |
| Yield zog | Ntau dua lossis sib npaug li 250 MPa | Ntau dua lossis sib npaug li 235 MPa | Ntau dua lossis sib npaug li 235 MPa | Ntau dua lossis sib npaug li 245 MPa |
| Tensile zog | 400-550 MPa | 370-500 MPa | 360-510 MPa | 400-510 MPa |
| Weldability | Zoo heev | Zoo heev | Zoo heev | Zoo heev |
| Muaj | Ntiaj teb no | Feem ntau nyob rau hauv Suav teb | Feem ntau hauv EU tej yaam num | Feem ntau hauv Asia |
| Daim ntawv pov thawj | ASTM / ASME Cov | GB / T | TS EN 10025 | JIS G3101 |
| Nqe Qib | Nruab nrab | Tsawg (feem ntau economical) | Nruab nrab | Nruab nrab |
| Kev siv yam | General kev tsim kho, fabrication | Kev tsim kho, kev tsim, kev tsim | Structure engineering, EU cov haujlwm | Machinery, qauv, fabrication |
Qhov Tseem Ceeb Xaiv Logic
1. Raws li qhov project qhov chaw
Teb Chaws Asmeskas / Roj & Roj / International EPC →A36
Tuam Tshoj domestic tej yaam num →Q235
Teb chaws Europe / CE tej yaam num →S235
Nyiv / Southeast Asia →SIB 400
2. Raws li tus nqi rhiab heev
Tus nqi qis tshaj →Q235
Balanced ntiaj teb kev xaiv →A36 / S235
Lub regional khoom kom zoo dua →SIB 400
3. Raws li kev ua tau zoo
👉 plaub qib no yogzoo heev nyob rau hauv mechanical zog
Qhov txawv yog feem ntau:
Standard system
Daim ntawv pov thawj xav tau
Me ntsis zog variations
Specifications
| Qeb | Specification |
|---|---|
| Txuj | ASTM A36, A283, A572 Gr.50 / EN 10025 (S235, S275, S355) / JIS G3101 (SS400) / GB / T 700 (Q235), GB / T 1591 (Q345) |
| Thickness | 3-200 hli (0.12 "- 7.87") |
| Dav | 1000-3500 hli (39.4 "- 137.8") |
| Ntev | 2000-12000 hli (78.7 "- 472.4") |
| Thickness kam rau ua | EN 10029 Chav Kawm A / B / C / ASTM A6 Txuj |
| Surface condition | Kub Rolled (HR), Pickled & Oiled (P & O), Txhaum Blasted, Painted / Coated |
| Ntug mob | Mill Edge (ME), Slit Edge (SE) |
| Kev Xa Khoom | Raws li Rolled (AR), Normalized (N), TMCP |
| Kev kho cua sov | Normalizing, Annealing, Stress Relieving |
| Kev tshuaj xyuas | Chemical Analysis, Mechanical Testing, UT Testing |
| Daim ntawv pov thawj | EN 10204 3.1 / 3.2, Thib Peb- Kev Tshawb Fawb Txog Kev Tshawb Fawb (SGS, BV, TUV) |
| Kev Pabcuam | Txiav, Khoov, Vuam, Drilling |
| Txheej txheej xaiv | Painting, Galvanizing, Anti{0}} txheej txheej |
| Daim ntawv thov | Kev tsim kho, txuas hniav, tshuab, nkoj tsim, infrastructure |
Resistant hnav thiab tawg
Hnav tiv thaiv, scalable zoo heev tshuaj tiv thaiv, zoo alkali-ua hauj hlau thiab acid zog
Txhim kho Surface Quality:
Kub-rolled steel daim hlau feem ntau muaj cov npoo du dua piv rau txias- dov steel phaj, uas ua rau muaj qhov tsis xws luag xws li qhov tsis sib xws. Qhov no yog qhov tseem ceeb tshwj xeeb rau cov ntawv thov uas xav tau qhov zoo ntawm qhov chaw zoo, xws li coatings lossis plating.
Superior Mechanical Properties
Kub- dov steel phaj yooj yim dua rau kev tsim thiab txheej txheem vim lawv qhov chaw tsis yog qhov nyuaj thiab muaj zog zoo li qhov txias- dov steel phaj. Qhov no ua rau kub- dov steel phaj ntau dav siv hauv kev tsim khoom lag luam.
03.
Zoo dua Formability
Kub- dov steel phaj yooj yim dua rau kev tsim thiab txheej txheem vim lawv qhov chaw tsis yog qhov nyuaj thiab muaj zog zoo li qhov txias- dov steel phaj. Qhov no ua rau kub- dov steel phaj ntau dav siv hauv kev tsim khoom lag luam.
Peb cov khoom thiab khoom siv
8
xyoo
Peb tau ua haujlwm hauv kev lag luam txij li xyoo 2017
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daim ntawv pov thawj
Peb tau txais feem ntau ntawm cov ntawv pov thawj kev tshaj lij hauv kev lag luam thiab hais kom thoob ntiaj teb cov qauv tsim khoom.
Txheej txheem ntau lawm
Packing & Shipping
1.Standard hiav txwv- tsim nyog export ntim,
2. yas hau nrog ob qho kawg
3.steel strip bundled pob, waterproof ntaub ntim
4. Ntoo rooj plaub, ntoo pallet pob
5.container lossis bulk (Raws li cov neeg siv khoom xav tau)
6. ntoo pallets nrog yas tiv thaiv.
7. 15-20MT tuaj yeem thauj khoom rau hauv 20 ftcontainer thiab 25-27MT tuaj yeem thauj khoom rau hauv 40 ft thawv.
8. Rau 20 ft thawv qhov ntev max yog 5.8m, rau 40 ft thawv qhov ntev max yog 11.8m.
9. Lwm qhov kev ntim khoom tuaj yeem ua raws li cov neeg siv khoom xav tau.
FAQ
1. Puas yog A36, Q235, S235, thiab SS400 sib npaug?
Yog lawm, lawv feem ntau xav txogqib sib npaugrau structural applications. Txawm li cas los xij, lawv tau tsim nyob rau hauv cov qauv sib txawv (ASTM, GB, EN, JIS), thiab qhov sib txawv me me yuav muaj nyob hauvtshuaj muaj pes tsawg leeg, mechanical zog, thiab ntawv pov thawj yuav tsum tau.
2. Qib twg yog qhov muaj zog tshaj ntawm A36, Q235, S235, thiab SS400?
Tag nrho plaub qib muajzoo sib xws zog, mas:
A36 feem ntau muaj lub zog siab dua me ntsis (~ 250 MPa)
Q235 thiab S235 yog nyob ib ncig ntawm 235 MPa
SS400 yog nyob ib ncig ntawm 245 MPa
👉 Hauv kev xyaum, qhov sib txawv me me thiab tsis tseem ceeb rau feem ntau cov ntawv thov.
3. Cov qib steel twg yog tus nqi tshaj -zoo?
Q235feem ntau yog qhov kev xaiv pheej yig tshaj plaws, tshwj xeeb tshaj yog rau cov haujlwm tau los ntawm Tuam Tshoj.
Txawm li cas los xij, tag nrho cov nqi nyob ntawmlogistics, ntawv pov thawj, thiab qhov project qhov chaw.
4. Cov qib no puas tuaj yeem siv sib hloov?
Hauv ntau daim ntawv thov kev tsim qauv, yog.
Tab sis ib txwm paub meej tias:
Project specifications
Cov qauv tsim nyog (ASTM, EN, thiab lwm yam)
Kev pom zoo engineering
👉 Kev hloov pauv yam tsis tau pom zoo tsis pom zoo rau cov qauv tseem ceeb.
5. Kuv yuav tsum xaiv qib twg rau cov haujlwm xa tawm?
USA / thoob ntiaj teb tej yaam num →A36
Teb chaws Europe →S235
Tuam Tshoj →Q235
Nyiv / Asia →SIB 400
👉 Xaiv raws licov kev xav tau ntawm cov neeg siv khoom thiab kev ua raws li cov qauv.
6. Dab tsi yog qhov txawv ntawm cov qib no?
Qhov sib txawv tseem ceeb yog:
Standard system (ASTM / GB / EN / JIS)
Daim ntawv pov thawj xav tau
Me me variations nyob rau hauv mechanical zog
👉 Kev ua tau zoo sib xws.
7. Qib twg muaj qhov zoo tshaj plaws weldability?
Tag nrho plaub qib muajzoo heev weldability, ua rau lawv haum rau:
Kev tsim qauv tsim
Kev tsim kho vuam
Machinery manufacturing
8. Cov hlau no puas haum rau qhov chaw sab nraum zoov lossis corrosive?
Lawv muajtxwv corrosion kuj.
Rau sab nraum zoov lossis ib puag ncig hnyav, yuav tsum muaj kev tiv thaiv ntxiv:
Kev pleev xim
Galvanizing
Anti- txheej txheej
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