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HDG SPCC Z180 Z275 Dx51d Hot Dipped Sheet Metal Coil Galvanized Steel Coils for Contruction1
Steel ProductsSheet Metal CoilGalvanized Sheet Metal Coil
Qingdao Witop Steel Co., Ltd
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Product DescriptionQingdao Witop Steel Co., LtdTrusted by 1,000+ Clients Worldwide for Over 20 Years20+ Years of Industry ExperienceWith over two decades of expertise in coated steel production and export, we deeply understand global market needs and quality standards.Trusted by 1,000+ Global ClientsOur steel products have been successfully delivered to more than 1,000 clients in over 30 countries, earning long-term trust and repeat orders.Full Range of Steel ProductsSpecializing in Galvanized (GI), Galvalume (GL), Aluzinc, Zincalume, Prepainted (PPGI/PPGL) coils and sheets—widely used in roofing, construction, and industrial applications.Efficient Export ServiceFast response, professional documentation, and one-on-one support ensure a smooth international trade experience.Product DescriptionGalvanized Steel CoilHot dipped galvanized steel coil are processed by continuous hot-dip galvanizing from cold-rolled steel coil. Zinc coating on both sides can effectively prevent corrosion and rust, and increase the service life of steel plate.The main characteristics of hot dipped galvanized steel coil have good processing performance, strong corrosion resistance, high heat resistance, perfect mechanical properties and pretty surface quality, which are beneficial to further processing, economical and practical in infrastructure and construction.SpecificationStandardJIS G3302, EN10147, ASTM A653MGradeCommerical: SGCC, SGCH, DX51DDeep Drawn: DX52D, DX53D, DX54D, FS, DDS, SGCD, SGCFroming and Structrual Steel: S280GD, S320GD, S350GD, S400GD, S500GD, S550GDZinc CoatingZ30-400G/M2, G30, G60,G90, Z10, Z12,Z27Spangle ModelZero Spangle, Small Spangle, Regular Spangle, Big SpangleSurface TreatmentChromated, Oiled, No-oiledHardnessSofty, Semi Hard, Full Hard, G550Thickness0.11-4.00MMWidth20-1800MMCoil WeightCoil WeightCoil Inner Diameter508MM or 610MMPackageStandard Seaworthy Exporting PackingTransport TypeVessel Container, Vessel Bulk, Railway Container, Railway WagonLoading PortTianjin, Qingdao, Ningbo, Shanghai and other China's portDelivery Time15-25 Days after Receiving the DepositTerms of TradeEXW, FOB, CFR, CIFTerms of PaymentT/T and Irrevocable LC at SightProduction Capacity7000MT/MonthApplicationRoofing, wall cladding, Structural steel, pre-painted panelsCar body components, chassis partsRefrigerator back panels & air conditioner shellsSteel cabinet, shelf manufacturingVentilation ducts, chimney pipes, and flue systemsElectrical enclosures, distribution boxesCeiling panels, wall partitionsToolboxes lighting fixtures metal craftworkGreenhouse tubes, scaffold pipes, cable conduitsCable tray supports & grounding accessoriesC/Z structural purlinsIndustrial packaging straps, steel bundling strips Electronic frames and appliance bracketsProduct StructureGalvanized Steel Coil Structure* Chromated, Oiled/non-Oiled, Anti-Finger Printing*Zinc Coated/ Aluzinc Coated/Galvalume Coated/ Zincalume Coated Layer*Steel Sheet (Base Metal)More Spangle Type for Choose1. Zero Spangle2. Small Spangle3. Regular Spangle4. Big SpangleProcess Flow ChartHot Dipped Galvanized Steel Coil Process Flow Chart1. Pay Off2. Welder3. Entry Looper4. Annealing Furnace5.Zinc Pot / Aluzinc Pot6. Spangle and Alloying Equipment8. Coating Weight Control9. Air Cooling10. Coating Weight Measurement11. Water Cooling12. Skinpass Mill13. Tension Leveler14. Chemical Treatment15. Delivery Looper16. Surface Inspection17. Oiler18 Tension ReelQA QC InpectionProfessional Inspect EquipmentQuality Control – Guaranteed for Every BatchWe conduct strict quality control tests on every batch of galvanized steel coils before shipment to ensure superior product performance and customer satisfaction.Our Key Testing Procedures Include:Coating Thickness Test:Ensures consistent corrosion resistance and compliance with standards like ASTM A653, JIS G3302, and EN 10346.Tensile Strength & Elongation Test:Verifies mechanical strength and flexibility for forming, bending, and stamping applications.T-Bend & Flexibility Test:Confirms the coating's adhesion under extreme bending without cracking or peeling.Surface Finish & Spangle Inspection:Checks for regular, zero, or minimized spangle and overall surface appearance for aesthetic and performance requirements.Thickness and Width Precision Measurement:Guarantees tight tolerances as per order specifications.Chemical Composition Analysis:Validates base steel consistency using spectrometer analysis.Packing & DeliveryPacking DetailsStandard export package: 3 layers of packing, inner side is anti-water craft paper, PVC plastic film is the middle and outer side covered by at least 0.45mm thick steel sheet,wrapped by minimum seven steel strapping strips with lock catch.In particular, WITOP steel places desiccant on the coil inner core side and on both lateral sides of the coil for bulk transportation to ensure that coils are delivered to clients in good condition.Package can be customized as client's requirements.Loading and Fastening Steel CoilWITOP steel have our own loading and fastening workers and team, which can fasten steel coils well in container and bulk based on ship line company. WITOP steel can guarantee galvanized steel coil well to every client.ApplicationWhy Choose UsCustomer Visited USOur ExhibitionOur PartnerOur factory welcomes international customers who personally visited our production line.With over 20 years of experience, Witop Steel is a trusted Chinese supplier serving 1000+ clients globally.We offer full factory tours, third-party inspection, and professional export services.Contact us to schedule a visit and explore long-term cooperation.Witop Steel regularly participates in international exhibitions such as Canton Fair, BIG 5 Dubai, BuildTech Asia, and other steel & construction trade shows around the world.Over the years, we've welcomed clients from Asia, the Middle East, Africa, South America, and Europe. Our exhibitions strengthen long-term partnerships and help buyers understand our quality and service firsthand.At Witop Steel, we believe that high-quality products start with reliable raw materials.That's why we source our base steel and coatings from leading Chinese steel manufacturers. Including long-term partnerships with certified mills such as Shougang, Baosteel, Rizhao Steel, and other reputable suppliers.Customer ReviewCeritifcateOver the years, Witop Steel has served more than 1,000 clients in 30+ countries, earning high praise for our product quality, fast delivery, and professional service.Our factory is ISO 9001 certified and our products comply with international standards such as ASTM, JIS, EN, ensuring consistent performance, durability, and safety for our global clients.Buyer's Guide: Common Questions Answered by Witop SteelQ1: Are you a manufacturer or trading company?A: We are a professional manufacturer of galvanized steel coils, galvalume coils, and prepainted steel (PPGI/PPGL) with over 20 years of experience. Our factory is located in China and supports both OEM and direct export services. Q2: What is your minimum order quantity (MOQ)?A: Our standard MOQ is 25 tons (1 container), but we also support small trial orders for new customers. Q3: What standards do your products follow?A: We produce coils according to ASTM A653, JIS G3302, EN 10346, and other international standards. Certificates like ISO, SGS, BV, CO, and Form E are available upon request. Q4: Can you provide sample coils or cut sheets?A: Yes, we can provide free A4-sized samples or cut sheets for testing and evaluation. Shipping costs may apply depending on location. Q5: How do you ensure quality control?A: Each batch undergoes strict quality inspection, including:Coating and thickness testTensile strength and elongation testT-bend and impact testSurface and spangle inspectionWe also provide mill test certificates (MTC) for every order. Q6: What's your lead time?A: Normal delivery time is 20–25 days after receiving the deposit. Urgent orders can be prioritized. Q7: Do you support third-party inspection?A: Yes. We welcome inspections by SGS, BV, TUV, or any agency appointed by the buyer. Q8: Which markets do you serve?A: Our main markets include Southeast Asia, the Middle East, Africa, South America, and Eastern Europe. We've served over 1,000 global buyers. Q9: Can I visit your factory in China?A: Absolutely! We welcome you to visit our factory. We'll provide pickup service, arrange a factory tour, and show you the production & inspection process. Q10: What are your payment terms?A: We accept T/T, L/C, and in some cases, DP or OA for long-term partners.
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