Galvanized Steel Coils

Manufacturers of ductwork, roofing profiles, silos, car parts and metal packaging across Poland depend on consistent galvanized steel coil suppliers. Sino East Steel is a hot-dip galvanized coil manufacturer and factory supplying ASTM A653, EN 10346 and JIS G3302 galvanized coils, sheets and slit strips in coating classes Z40–Z275 with thicknesses from 0.15 mm to 3.0 mm. Buying direct from our factory gives Polish coil users stable chemistry, tight tolerances, mill certificates on every lot and reliable monthly supply programs — the essentials for a production line that cannot stop.
Galvanized Steel Coils — Rolled, Coated and Ready for FabricationGalvanized steel coil is continuous hot-rolled or cold-rolled strip coated with zinc on a hot-dip galvanizing line, then re-coiled for further processing. It is the base material for thousands of products made in Poland and across the EU — from roofing sheets and cladding panels to automotive parts, household appliances and HVAC ducting. Sino East Steel supplies galvanized coils in thicknesses from 0.15 mm to 3.0 mm and widths from 600 mm to 1,250 mm, with zinc coatings from Z40 to Z275 and spangle-free or minimized spangle finishes. Coils are produced to EN 10346, ASTM A653 and JIS G3302 specifications, with full mill test certificates on every lot.
Hot-Dip Galvanizing of Steel CoilsCold-rolled or hot-rolled strip is cleaned, annealed and passed through a bath of molten zinc on a continuous galvanizing line. Air knives control the coating weight precisely across the strip width, and the coil then passes through a cooling tower where the zinc solidifies into the characteristic spangle. The finished coil is inspected for coating weight, adhesion and surface quality before being re-coiled and packed for export. Weights per coil range from 3 to 15 tons, which keeps container loading efficient for European buyers.
ApplicationsIn the Polish market, galvanized coil is consumed by roofing and cladding manufacturers, cold-roll forming lines producing purlins and profiles, ventilation and ducting workshops, agricultural building suppliers, and producers of metal furniture, shelves and storage systems. It is also the substrate for color-coated (PPGI) coil and can be slit or cut-to-length to match your processing line.
Choosing Coating and FinishFor exterior building products in Poland’s climate, specify Z275 coating with minimized spangle for a clean surface ready for painting or roll forming. For interior applications, Z100 to Z180 is usually sufficient and more economical. If the coil will be deep-drawn or roll-formed, choose the correct steel grade (DX51D, DX52D, DX53D or S220GD/S350GD for structural profiles) and confirm the yield strength your forming process requires.
Standards, Grades & Equivalents

StandardGradeTypical Use
EN 10346DX51D – DX57D, S220GD – S350GDContinuously hot-dip coated steelASTM A653CS-A/B/C, SS, HSLASGalvanized steel sheetJIS G3302SGCC, SGCD, SGC440Hot-dip zinc-coated steel
Available Sizes & Range

ItemRangeNotes
Thickness0.15 – 3.0 mmper customer requirementWidth600 – 1,250 mmslitting availableCoatingZ40 – Z275spangle / minimised / zeroCoil weight3 – 15 tID 508 / 610 mm
Specification Deep-Dive for Galvanized Steel CoilsGalvanized coil quality is defined by the steel grade, the coating class and the surface finish. We supply structural grades DX51D, DX52D, DX53D and DX54D to EN 10346 (equivalents: ASTM A653 CS-A/B/C, JIS G3302 SGCC/SGHC), with coating classes from Z40 to Z275 (Z100–Z140 is normally specified for interior applications). Coating weight is measured by the triple-spot method and stated in g/m² on the certificate. Surface finish options are regular spangle, minimised spangle, spangle-free and smooth, with chromate passivation and light oiling to protect the surface during transport and storage. Thickness ranges from 0.15 mm to 3.0 mm, widths up to 1500 mm, and coil inner diameters of 508 or 610 mm. Mechanical properties are verified per coil: yield strength, tensile strength, elongation and Rockwell hardness, with bend tests for adhesion. For Polish processing lines, consistent gauge profile across the width and controlled tension in the coil reduce downtime in slitting, roll forming and stamping — we state the tolerances in the certificate and can supply coils from the same production lot for large orders, which is essential for colour and coating consistency in downstream painting.
Ordering Galvanized Coils for Polish ProductionCoil users should specify thickness, width, inner diameter, coating class (Z40–Z275), steel grade (DX51D–DX54D or ASTM A653 equivalents) and total tonnage. We confirm coil weights, tolerances and the mill certificate before production, and can schedule regular monthly supply programs so your slitting or roll-forming line never stops. Mixed coating classes in one container are welcome.
Quality Control & CertificationEvery batch of material delivered from our Tianjin plant passes through a documented inspection routine: chemical composition analysis, tensile and yield testing, dimensional checks and, where applicable, hydrostatic or flattening tests. Each consignment ships with an EN 10204 3.1 mill test certificate (MTC) and batch traceability records, so your incoming inspection at Gdansk, Gdynia, Szczecin or any other EU port is straightforward. The factory operates under an ISO 9001:2015 quality management system and is independently audited by SGS and TUV Rheinland for production capacity and export reliability.
Export Documentation IncludedEvery order is shipped with a complete documentation set: commercial invoice, packing list, bill of lading, certificate of origin, and the EN 10204 3.1 mill test certificate with heat numbers and test results. Where your project requires third-party inspection, we can arrange SGS, TUV or Bureau Veritas inspection before loading, with the inspection report issued in English for easy clearance in the EU.
Why European Buyers Source This Product from Sino East SteelImporting steel from China to Poland is a routine, well-understood process when you work with a manufacturer that has done it hundreds of times. Sino East Steel combines factory-direct pricing with export experience across the EU, so you avoid the margin stack of trading companies and the documentation delays that slow down first-time imports. Our export team prepares commercial invoices, packing lists, certificates of origin, and the EN 10204 3.1 mill certificates your quality department and customs broker expect. We also coordinate vessel booking from Tianjin/Xingang to Baltic ports, and for regular customers we can hold production slots so repeat orders keep your warehouse stocked without interruption.Because we are the manufacturer, specification changes, coating requirements, packing instructions and delivery dates are agreed directly with the people who control the production line. This transparency is what distributors and contractors in Poland value most: one accountable partner, one set of documents, and material that matches the sample on every shipment.
Packaging & Delivery to Poland and the EUProducts are packed in seaworthy export condition: steel strapping, waterproof wrapping, and wooden or steel pallets where required, with clear marking for safe handling. For pipe and tube orders we use the standard export bundle format with plastic end caps on request. Sea freight to Polish and Baltic ports (Gdansk, Gdynia, Szczecin, Klaipeda) is arranged from Tianjin or Xingang port, with typical lead times of 15–25 days after production. FCL and LCL options are both available, and mixed-container consolidation is offered for regular customers who combine several product lines in one delivery.
Customization & Value-Added ServicesBeyond standard supply, our finishing lines can prepare material for your exact production step: cutting to length, drilling, bevelling, threading, coating, marking and custom bundling per your drawings. Packaging can be adapted to your handling equipment — pallets, frames, slings or individual protective wrapping — and private labeling is available for distributors who resell under their own brand. For customers with regular monthly programs, we schedule production slots so that reorder quantities arrive on time, allowing you to run leaner stock without risking supply gaps on your own production line.
Technical Support & After-Sales ServiceOur export engineers support you from specification to installation: confirming grade and size selections, advising on coatings and packing for your climate and handling equipment, and answering technical questions from your quality department. After delivery, we keep the batch records on file and can issue additional documentation, arrange replacement paperwork, or support you in the rare case of a claim. For Polish customers this means a single point of contact who knows your orders, your specifications and your delivery history — service that trading intermediaries rarely match.
Inspection & Testing Before ShipmentBefore any material leaves the plant it passes through a defined inspection gate. Dimensional checks are performed against the ordered specification, surface quality is inspected visually and with instruments where required, and the relevant mechanical and chemical tests are verified against the mill certificate. For pipe and tube products, hydrostatic and non-destructive testing results are reviewed against the standard’s acceptance criteria. Customers who request it can witness the inspection or receive photographs and video of the loaded goods before the vessel sails — a practical way to build confidence without travelling to China.
How to Order & Request a QuotationTo receive a firm quotation, please send your required specification: grade and standard, dimensions, quantities (in tons or pieces), end use, and the destination port in Poland or the EU. Our export team replies within 24 hours with pricing, availability and a proposed shipping schedule. We work with T/T and L/C payment terms, and for established EU customers longer payment arrangements can be discussed on a project basis.Request a quote: use the contact form, WhatsApp +86-186-2208-8833, or email [email protected].
Frequently Asked Questions
Can you supply galvanized coils slit to width?Yes. Slitting to customer widths from 30 mm up to full width is available, and slit coils can be packed separately with edge protection for handling on your processing line.
What is the difference between Z100 and Z275 coating?Z275 carries a zinc coating of 275 g/m² (total, both sides) versus 100 g/m² for Z100, so it offers roughly 2.5 times more corrosion protection. Heavier coatings are recommended for exterior exposure and coastal environments.
What coating classes are most common in Poland?Z180–Z275 covers the majority of Polish ductwork, profile and roofing applications. Z100–Z140 is used for interior parts, while Z300+ is specified for highly corrosive agricultural and coastal environments.
Can you supply slit coils and sheets from the same production lot?Yes. Coils can be slit to narrow widths and cut to sheets from the same lot, which guarantees consistent coating and chemistry across your entire order.
What documents do you provide with each shipment?Each shipment includes the EN 10204 3.1 mill test certificate, packing list, commercial invoice and bill of lading. Inspection reports and third-party certificates (SGS, TUV, Bureau Veritas) can be arranged before loading if your project requires them.
Can you supply to Polish and European standards?Yes. We regularly export to EN and DIN specifications used across the EU, including EN 10219, EN 39, EN 10210, EN 10305 and DIN 2440, in addition to ASTM and API standards. Tell us the standard your project specifies and we will quote accordingly.
What are your MOQ and lead times?MOQ depends on the product and size — typically from 1 to 10 tons for standard lines. Production and shipping to Polish ports normally takes 15–25 days from order confirmation.
Do you ship to Polish ports and handle customs paperwork?Yes. We ship FOB Tianjin/Xingang, CIF or CFR to Gdansk, Gdynia, Szczecin and other Baltic ports, and we prepare the export documentation (commercial invoice, packing list, bill of lading, certificate of origin, mill certificates) needed for import clearance in Poland.
Can we arrange a pre-shipment inspection?Yes. Third-party inspection by SGS, TUV, Bureau Veritas or your own representative can be arranged before loading, and the inspection report is provided before the vessel departs.
Do you offer samples before a full order?For most products we can provide small samples or cut pieces so your quality department can verify the material. Sample cost is credited against the first order for regular customers.
About Sino East Steel — Sino East Steel is a factory-direct manufacturer and exporter of carbon steel, galvanized steel and structural steel products, operating from a 65,000 m² production base in Tianjin, China. Since 2005 the company has built a steady export record across Europe, the Middle East and the Americas, supplying distributors, contractors and engineering companies that require consistent quality, complete documentation and dependable delivery. For Polish buyers, this means a single certified source for pipes, coils, sheets, bars and structures, with every shipment supported by mill test certificates and traceable batch records.
Sourcing This Product from China to Poland — What to ExpectImporting steel from China to Poland is a standard, well-documented process when the manufacturer manages it end to end. After you confirm the specification, we issue a proforma invoice with price, production time and shipping terms (FOB Tianjin/Xingang, CIF or CFR to Gdansk, Gdynia, Szczecin or Klaipeda), produce and inspect the material, prepare the full export documentation set, and book the vessel. Total lead time from order confirmation to arrival at a Polish port is typically 15–25 days for standard products. Polish importers pay import VAT and customs duties at the EU border using the commercial invoice, packing list and certificate of origin we provide; the EN 10204 3.1 mill certificates satisfy your quality department and any project documentation requirements. For first orders we recommend a trial container with the most popular sizes, so you can verify material, documents and delivery performance before committing to a larger supply program.