Txuj: ASTM A500 (Cov-Tsim Welded thiab Seamless Carbon Steel Structure Tubing)
Qib: Qib A
Yam khoom: Square Steel Tube, Rectangular Steel Tube
Kev kho saum npoo: Pre-galvanized (Zoo Galvanized)
Zinc Txheej Nyhav30-40g / m² (Kev cai zinc txheej muaj)
Txheej txheem ntau lawm: Galvanized steel sawb txoj kev → siab - zaus vuam → shaping → txiav → nto tiav → tshuaj xyuas
Muaj Qhov Loj LojCustomizable (Sab ntev: 10mm-200mm; Phab ntsa thickness: 1.5mm-25mm; Txuj ntev: 6m / 12m, random ntev tau)
Tube End: Square txiav, tiaj tus kawg, deburred (chamfered yeem)
ASTM A500 GR. Pre-galvanized Square thiab Rectangular Steel Tubeyog atxias- ua welded structural steel tubingtsim los ntawm pre-galvanized steel kauj. Nws ua tau raws li qhov yuav tsum tau ua nruj me ntsis ntawm ASTM A500 Qib A, muab qhov zoo tshaj plaws sib npaug ntawm cov qauv siv zog, weldability, thiab tus nqi- ua tau zoo rau kev siv kev tsim kho. Z30-Z40 g / m² zinc txheej muab qhov tseem ceeb tiv thaiv corrosion thaum tuav lub ntsej muag du, ci ntsa iab.
Ua los ntawm siab - zaus ERW vuam, cov raj no muaj nyob rau hauv square thiab rectangular cross-section nrog qhov ntev, nruj tolerances, thiab zoo heev formability. CovZ30-Z40 zinc txheej (feem ntau 30-40 g / m²) muab peb cov khoom ci ci, ci tiav uas ua tau raws li qhov xav tau zoo nkauj ntawm sab hauv thiab ib nrab- daim ntawv thov sab nraum zoov.
Cov Qauv Tseem Ceeb: ASTM A500 Qib A|EN10219|GB/T 6728
Pre-galvanized vs. Kub-Dip Galvanized - Kev sib piv nthuav dav
Kev nkag siab qhov sib txawv ntawm Pre-galvanized thiab Kub-Dip Galvanized steel hlab pab koj xaiv qhov kev daws teeb meem zoo tshaj plaws rau koj qhov project tshwj xeeb. Hauv qab no yog ib sab ua tiav -los ntawm- sab kev sib piv raws tsib qhov loj me:
| Sib piv Dimension | Pre-galvanized Tube (Peb cov khoom) | Kub-dip Galvanized Tube |
| Txheej txheem | Hlau kauj yog coated ua ntej (nruam kab), ces yob-tsim thiab ERW welded rau hauv raj | Steel raj yog tsim ua ntej, ces tag nrho cov dipped rau hauv ib tug molten zinc da dej ntawm approx . 450 degree |
| Zinc Txheej Thickness | Cov txheej nyias nyias: feem ntau 10–30 μm (kwv yees . 30–40 g / m² rau qib Z30–Z40) | Txheej tuab thiab muaj zog: feem ntau 45-120 μm (200-600 g / m²) |
| Weld Seam Kev Pabcuam | Tshaj tawm. ERW weld seam tsis muaj zinc txheej - xav tau kev tiv thaiv ntxiv yog siv sab nraum zoov | npog tag nrho. Weld seam yog coated tag nrho thaum immersion, muab kev tiv thaiv txhua puag ncig |
| Nto Finish & Aesthetics | smooth, uniform, ci, thiab ci - zoo heev rau cov ntawv pom | Matte grey tiav; tej zaum yuav pom spangles thiab me ntsis nto irregularities |
| Corrosion Lub Neej (Sab nraum zoov) | Txwv: 2-10 xyoo nyob rau hauv me me sab nraum zoov tej yam kev mob; weld seam yog qhov yooj yim point | Ntev ntev: 30-50 xyoo nyob rau hauv cov xwm txheej zoo sib xws; zoo tagnrho rau ib puag ncig hnyav |
| Tus nqi sib txawv | Kev lag luam ntau dua: 20-30% tus nqi qis dua vim yog cov txheej txheem ntau lawm | Tus nqi pib siab dua: 30-50% kim dua, tab sis muab cov nqi qis dua rau kev ua haujlwm sab nraum zoov mus ntev |
Txheej txheem sib piv ntawm ib nrais muag:
Ua ntej-galvanized (Peb Cov Khoom):
Galvanized steel kauj → Slitting → ERW yob txoj kev → Vuam → Txiav → tiav tube (weld seam tseem uncoated)
Kub-Dip Galvanized:
Carbon steel coil → Roll forming → Vuam → Txiav → Pickling → Fluxing → Immersion hauv molten zinc (450 degree) → Txias → Kev tshuaj xyuas (tag nrho cov raj, sab hauv thiab sab nraud, yog coated)
ASTM A500 Qib A Technical Specifications
Mechanical Properties
ASTM A500 npog txias- ua welded thiab seamless carbon steel structural tubing nyob rau hauv round, square, thiab rectangular duab, nrog rau qib A, B, C, thiab D txawv los ntawm txhua yam khoom
| Khoom | Round Tubing (Qib A) | Square / Rectangular Tubing (Qib A) |
| Tensile zog, min | 45,000 psi (310 MPa) | 45,000 psi (310 MPa) |
| Yield zog, min | 33,000 psi (230 MPa) | 39,000 psi (269 MPa) |
| Elongation hauv 2 nti. (50 mm), min | 25% | 25% |
Rau cov raj square thiab duab plaub, qhov kev xav tau lub zog muaj zog ntau dua rau cov raj puag ncig vim qhov txias - tsim cov txheej txheem shaping
Chemical Composition (Qib A - Heat Analysis)
| Element | Qhov siab tshaj (%) |
| Cov pa roj carbon (C) | 26% |
| Manganese (Mn) | 135% |
| Phosphorus (P) | 4% |
| Sulfur (S) | 4% |
| Copper (Cu) | 0.20 (thaum teev) |
Cov ntsiab lus qis carbon ntawm Qib A ua kom zoo weldability thiab formability, ua rau nws haum rau kev siv cov qauv siv uas tsis tas yuav muaj zog tshwj xeeb.
| Parameter | Ua siab ntev |
| Sab ntev kam rau ua | ±0.5% |
| Phab ntsa thickness kam rau ua | ±10% |
| Kev ncaj | Tsawg dua lossis sib npaug li 0.1% ntawm tag nrho qhov ntev |
| Ntev | ± 5 hli |
Z30-Z40 Zinc Txheej Cov ntsiab lus:
Peb lub pre-galvanized tubing nta Z30-Z40 zinc txheej, uas yog feem ntau zinc txheej specification rau ua ntej-galvanized square thiab rectangular raj nyob rau hauv lub ntiaj teb no kev ua lag luam. Qhov kev qhia tshwj xeeb no muaj qhov sib npaug txhim khu kev qha ntawm kev tiv thaiv corrosion thiab tus nqi ua haujlwm.
| Txheej Parameter | Specification |
| Zinc txheej hnyav | 30-40 g / m² (ob tog) |
| Sib npaug thickness | Kwv yees li . 5–7 μm |
| Nto zoo li | Bright, du, uniform tiav |
| Corrosion lub neej (hauv tsev / qhuav) | 5-10 xyoo |
| Corrosion life (mob sab nraum zoov) | 2-5 xyoos (nrog kev tiv thaiv weld seam pom zoo) |
Daim ntawv thov
ASTM A500 pre-galvanized square thiab rectangular raj yog dav siv nyob rau hauv tus nqi- rhiab heev cov qauv siv, qhov twg ib tug huv si thiab zoo nkauj txaus siab ua tiav:
Cov cheeb tsam tseem ceeb ntawm daim ntawv thov
Kev tsim kho & khoom siv hauv tsev- Teeb pom kev zoo, tsim kab, thiab kev txhawb nqa
Scaffolding Systems- Rau ib ntus thiab ib nrab- ua haujlwm tas mus li
Phab ntsa ncej & Handrails- Bright tiav haum rau pom kev teeb tsa sab nraum zoov
Tsev cog khoom Framing- Durable thiab corrosion-resistant rau cov qauv ua liaj ua teb
Automotive Cheebtsam- Dov tawb, tsheb racks, thiab tsis yog - cov yam ntxwv tseem ceeb
Kev Tiv Thaiv Hluav Taws Xob- Tsis yog-combustible thiab haum rau cov kav dej tua hluav taws
Hluav taws xob Conduits (Interior)- Smooth tiav thiab zoo ib yam
Furniture Manufacturing- Aesthetic deg zoo tagnrho rau cov khoom tsim tawm
FAQ
Q1: Puas yog ASTM A500 Qib A haum rau siv sab nraum zoov?
A: Yog, tab sis nrog kev txwv. Rau qhov chaw sab nraum zoov me me, peb lub pre-galvanized Z30-Z40 raj muab 2-5 xyoo ntawm kev tiv thaiv corrosion. Txawm li cas los xij, ERW weld seam tsis yog coated, yog li rau lub sij hawm ntev - sab nraum zoov raug los yog hnyav ib puag ncig, peb pom zoo kom yog (a) thov kov- txheej txheej ntawm weld seam, los yog (b) kho dua tshiab rau kub -dip galvanized tubing.
Q2: Dab tsi yog qhov txawv ntawm Qib A, Qib B, thiab Qib C hauv ASTM A500?
A: ASTM A500 Qib A muaj lub zog nruab nrab (Yield: 269 MPa min rau cov raj zoo li tus) thiab yog tus nqi tshaj plaws -zoo rau kev siv cov qauv siv. Qib B muaj lub zog siab dua (Yield: 317 MPa min), thaum Qib C muab lub zog siab tshaj plaws (Yield: 345 MPa min) rau hnyav -lub luag haujlwm thauj khoom- cov ntawv thov.
Q3: Z30-Z40 txheej puas tuaj yeem pleev xim lossis hmoov-coated?
A: Yog. Cov txheej zinc du thiab zoo ib yam ntawm pre-galvanized tubing muaj qhov zoo adhesion rau tha xim thiab hmoov txheej. Kev npaj lub teeb (degreasing) yog pom zoo ua ntej siv cov xim los yog hmoov txheej.
Q4: Dab tsi yog qhov ntsuas kub rau pre-galvanized steel raj?
A: Lub zinc txheej tseem ruaj khov txog li 200 degree. Tshaj qhov kub no, zinc txheej yuav yaj, cuam tshuam kev tiv thaiv corrosion. Rau siab - cov ntawv thov kub, sab laj nrog peb pab neeg ua haujlwm engineering.
Q5: Puas yog kev cai ntev, qhov ntev, thiab cov kev pabcuam ua haujlwm muaj?
A: Yog lawm. Peb muab cov kev hloov kho me me (inch, phab ntsa thickness, ntev), nrog rau cov kev pabcuam ntxiv xws li xuas nrig ntaus, khoov, txiav, thiab vuam - txhua yam haum rau koj qhov project specifications.
Q6: Yuav ua li cas ua ntej -galvanized raj ntim rau cov khoom xa tuaj?
A: Cov hlab yog bundled nrog steel strapping, tiv thaiv nrog yas hau ntawm ob hnub, thiab qhwv los tiv thaiv nto khawb thiab noo noo ingress thaum lub sij hawm thauj mus los. Kev ntim ntim yog muaj rau kev xa tawm.
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