Hot Dip Galvanized Sheet – Zinc-coated flat steel for ducts, panels and fabrication.
Z30 to Z275 Coating – Multiple zinc coating weights for different service environments.
Custom Spangle Options – Regular, minimized, zero and large spangle surfaces available.
Cut-to-size Supply – Thickness, width, length and pallet weight can be customized.
Export Ready Service – MTC, coating inspection, pallet packing, FOB, CIF and CFR available.
Hot dip galvanized steel sheet is a flat steel product protected by a continuous zinc coating. The zinc layer helps isolate the steel substrate from moisture, oxygen and atmospheric exposure, providing better corrosion resistance than ordinary uncoated carbon steel sheet.
Galvanized steel sheet is also commonly called GI sheet, galvanized iron sheet, galvanised steel sheet or zinc-coated steel sheet. It can be cut, bent, punched, stamped, roll-formed, corrugated and fabricated into a wide range of construction and industrial products.
Henan GDD supplies galvanized steel sheets in multiple grades, thicknesses, dimensions, zinc coating weights, spangle types and surface treatments. Cut-to-size service, customized pallet weight, inspection documents and international shipping support can be arranged according to customer requirements.
| Item | Specification |
|---|---|
| Product Name | Hot Dip Galvanized Steel Sheet / GI Sheet / Zinc Coated Steel Sheet |
| Base Material | Cold Rolled Steel / Hot Rolled Steel |
| Steel Grade | DX51D, DX52D, DX53D, DX54D, SGCC, SGCH, S250GD, S280GD, S350GD, Q195, Q235 or Customized |
| Standard | EN, ASTM, JIS, GB or Customer Specification |
| Thickness | 0.12 mm – 6.00 mm or Customized |
| Width | 600 mm – 2000 mm or Customized |
| Length | 1000 mm – 6000 mm or Customized |
| Zinc Coating | Z30 – Z275 or Customized |
| Spangle Type | Regular Spangle, Minimized Spangle, Zero Spangle, Large Spangle |
| Surface Treatment | Passivated, Chromated, Oiled, Dry, Anti-fingerprint or Customized |
| Surface Condition | Smooth, Skin-passed, Bright or Visible Spangle Surface |
| Edge Type | Mill Edge, Slit Edge or Cut Edge |
| Processing Service | Cutting, Slitting, Leveling, Bending, Punching and Corrugating Support |
| Inspection | MTC, Dimension Check, Zinc Coating Test, Surface Inspection and Third-party Inspection |
| Applications | HVAC Ducts, Construction Panels, Roofing, Cabinets, Cable Trays, Appliances and Stamping Parts |
| Packing | Wooden Pallet, Waterproof Wrapping and Standard Export Seaworthy Packing |
| Trade Terms | FOB, CFR, CIF, EXW |
Available sizes, zinc coating weights and mechanical properties may vary according to grade, production standard and order quantity. Final specifications should be confirmed through the purchase order and material certificate.
Hot dip galvanized steel sheet is produced by coating a prepared steel substrate with zinc through a continuous galvanizing process. The zinc forms a protective metallic layer over the steel surface.
This protective layer provides barrier protection and sacrificial corrosion protection. When a small exposed area is damaged, the surrounding zinc can help reduce corrosion of the underlying steel.
After galvanizing, the steel can receive passivation, oiling, skin passing or anti-fingerprint treatment depending on storage, forming and appearance requirements.
DX51D is a commonly used galvanized steel grade for general forming and fabrication. It is widely used for HVAC ducts, roofing components, wall panels, cable trays, cabinets and construction accessories.
DX52D and DX53D provide improved forming performance compared with general commercial-quality grades. They are suitable for parts requiring more bending, pressing or drawing.
SGCC is a widely recognized JIS galvanized steel grade used for construction panels, appliances, air ducts, metal enclosures and general industrial processing.
Grades such as S280GD and S350GD provide higher yield strength for structural profiles, load-bearing panels and formed construction components.
Zero spangle galvanized sheet has a smooth and uniform surface with minimal visible zinc crystal patterns. It is suitable for painting, powder coating, appliance panels and visible fabricated products.
Regular spangle galvanized sheet has visible zinc crystal patterns and is commonly used for roofing, ducts, construction materials and general industrial products.
In HVAC systems, galvanized steel sheet is used for rectangular ducts, round ducts, duct fittings, ventilation housings and air-distribution components.
In building construction, GI sheets are processed into roofing accessories, wall panels, ceiling panels, partitions, garage doors, shutters and prefabricated building components.
Electrical and industrial manufacturers use galvanized sheet for cabinets, control boxes, equipment enclosures, cable trays, machinery covers and storage systems.
Galvanized steel sheet is also used for home appliance panels, automotive components, shelves, metal furniture, agricultural equipment, stamping parts and general fabrication.
The zinc coating helps reduce exposure of the steel substrate to moisture and atmospheric corrosion.
Galvanized sheet provides a practical balance of steel strength, corrosion protection, processing performance and purchasing cost.
Suitable grades can be bent, punched, stamped, roll-formed and processed into complex construction and industrial components.
Regular, minimized, zero and large spangle surfaces can be selected according to appearance and processing requirements.
Sheet thickness, width, length, pallet weight and cutting tolerances can be customized according to customer equipment.
Smooth and zero spangle sheets can be used for painting, powder coating and other finishing processes when properly pretreated.
Zinc coating weight affects corrosion protection, forming behavior, material cost and final product service life. Common specifications include Z30, Z60, Z80, Z100, Z120, Z180 and Z275.
Lower coating weights may be suitable for indoor applications and products with limited environmental exposure. Medium coating weights are widely used for HVAC ducts, cabinets, panels and general building components.
Heavier zinc coatings such as Z180 and Z275 are commonly selected for roofing, outdoor construction and applications requiring stronger atmospheric corrosion protection.
Regular spangle sheet has clearly visible zinc crystal patterns. It is commonly selected for roofing, ducts and construction products where the traditional galvanized appearance is acceptable.
Zero spangle sheet has a smoother and more uniform surface. It is often selected for appliance panels, painted products, cabinets and applications requiring a cleaner appearance.
The correct surface should be selected according to final appearance, painting method, forming process and project specifications.
Cold rolled steel sheet provides a smooth and dimensionally accurate surface but does not have a zinc coating. It normally requires oiling, painting or another coating to reduce corrosion risk.
Galvanized steel sheet uses cold rolled or hot rolled steel as the substrate and adds a zinc layer for improved corrosion protection.
Cold rolled sheet is suitable for stamping, painting and further coating. Galvanized sheet is more convenient when the finished product requires ready-made zinc protection.
Galvanized steel sheet uses a zinc coating, while Galvalume sheet uses an aluminum-zinc alloy coating.
Galvanized sheet provides good forming performance and economical corrosion protection for ducts, cabinets, panels, appliances and general construction products.
Galvalume sheet may provide better heat reflectivity and long-term corrosion resistance in certain roofing and outdoor environments. Material selection should be based on forming requirements, service conditions and project budget.
Passivation and chromate treatments help improve temporary protection during storage and transportation. Oiled surfaces provide additional resistance to moisture and white rust.
Dry surfaces may be selected when oil is not suitable for the next production process. Anti-fingerprint treatment creates a cleaner surface for visible panels, cabinets and appliance components.
Surface treatment should be selected according to storage time, forming process, painting requirements and final product use.
Henan GDD can arrange cut-to-length processing for customers requiring ready-to-use galvanized flat sheets. Sheet length, width, pallet weight and packing arrangement can be customized.
Slitting, leveling, bending, punching and corrugating support can also be discussed according to material grade, thickness and final product design.
Buyers should provide the required thickness tolerance, width tolerance, length tolerance, edge condition, surface treatment and acceptable pallet weight before production.
Selection should consider steel grade, thickness, sheet dimensions, zinc coating, spangle type, surface treatment, forming method and final exposure environment.
DX51D and SGCC are suitable for many general forming applications. DX52D and DX53D can be considered for more demanding forming, while structural grades such as S280GD and S350GD are suitable for higher-strength components.
For an accurate quotation, customers should provide the complete specification, required quantity, pallet weight, destination port and preferred trade terms.
Henan GDD supplies galvanized steel sheets to HVAC duct manufacturers, construction material companies, electrical cabinet producers, appliance factories, stamping companies and global steel distributors.
We support multiple steel grades, customized sheet dimensions, zinc coating selection, spangle options, surface treatment, cutting service, inspection documentation and international shipment.
From specification confirmation and quotation to production, processing, inspection, packing and loading, our team provides one-stop export support for galvanized steel sheet orders.
Before shipment, inspection can include steel grade, thickness, width, length, zinc coating, spangle type, surface condition, flatness, edge quality, sheet quantity, pallet weight and packing.
Chemical composition, mechanical properties, zinc coating weight, bending performance and third-party inspection can also be arranged according to the applicable standard and customer specification.
MTC, inspection records, product photos, packing photos, loading photos and third-party inspection reports can be provided according to order requirements.
Galvanized steel sheets are normally packed with waterproof paper, protective wrapping, wooden pallets, steel straps, edge protection and identification labels.
Proper packing helps protect the zinc surface from moisture, scratches, deformation and handling damage during storage and ocean transportation.
Commercial invoice, packing list, bill of lading, MTC and certificate of origin can be provided according to the agreed trade terms.
Galvanized steel sheet is used for HVAC ducts, roofing components, wall panels, electrical cabinets, cable trays, appliances, stamping parts and construction products.
Common grades include DX51D, DX52D, DX53D, DX54D, SGCC, SGCH, S280GD, S350GD, Q195 and Q235.
Common options include Z30, Z60, Z80, Z100, Z120, Z180 and Z275. Customized coating requirements can also be discussed.
Regular spangle has visible zinc crystal patterns, while zero spangle has a smoother and more uniform surface.
Yes. Thickness, width, length, edge condition, pallet weight and packing can be customized according to customer requirements.
Yes. Suitable cleaning, surface preparation, primer and paint systems should be used to ensure proper adhesion to the galvanized surface.
Please provide the grade, thickness, width, length, zinc coating, spangle type, surface treatment, quantity, destination port and trade terms.
Yes. MTC, coating inspection, dimension records, product photos, packing photos, loading photos and third-party inspection can be provided according to order requirements.
Looking for DX51D, SGCC or Z275 galvanized steel sheets for HVAC ducts, construction panels, roofing, cabinets or industrial fabrication?
Send Henan GDD your required grade, thickness, dimensions, zinc coating, spangle type, quantity and destination port. Our team will provide a professional quotation and suitable export shipping solution.
