Hot Dip Galvanized Coil – Zinc-coated steel coil with strong corrosion resistance.
Multiple Steel Grades – SGCC, DX51D, DX52D, DX53D, Q195, Q235, S280GD, S350GD available.
Custom Zinc Coating – Z30, Z60, Z100, Z120, Z180, Z275 or customized coating weight.
Flexible Specifications – Thickness, width, coil weight, hardness, and spangle can be customized.
Surface Options – Regular spangle, minimized spangle, zero spangle, oiled, chromated, or passivated.
Wide Applications – Suitable for roofing sheets, wall panels, ducts, appliances, and steel fabrication.
Export Ready Supply – MTC, inspection support, FOB, CIF, CFR, and customized shipment terms available.
Hot dip galvanized steel coil is a zinc-coated steel product manufactured by passing steel substrate through a molten zinc bath. The zinc layer forms a protective barrier on the steel surface, helping improve corrosion resistance, oxidation resistance, and outdoor durability.
Because of its stable performance, clean surface, good forming ability, and cost-effective protection, galvanized steel coil is widely used in roofing sheets, wall panels, ventilation ducts, steel structures, home appliances, garage doors, fencing, cable trays, and general sheet metal fabrication.
Henan GDD supplies galvanized steel coils with customizable steel grades, thicknesses, widths, zinc coating weights, spangle types, hardness levels, and surface treatments. We support steel distributors, roofing sheet factories, construction material suppliers, appliance manufacturers, and global project buyers.
| Item | Specification |
|---|---|
| Product Name | Hot Dip Galvanized Steel Coil / GI Coil |
| Base Material | Cold Rolled Steel / Hot Rolled Steel |
| Steel Grade | SGCC, SGCH, DX51D, DX52D, DX53D, S280GD, S350GD, Q195, Q235 or Customized |
| Standard | ASTM A653, JIS G3302, EN 10346, GB/T 2518 or Customized |
| Thickness | 0.12 mm – 6.00 mm or Customized |
| Width | 600 mm – 1500 mm or Customized |
| Zinc Coating | Z30 – Z275 or Customized |
| Spangle Type | Regular Spangle, Minimized Spangle, Zero Spangle, Big Spangle |
| Surface Treatment | Chromated, Oiled, Dry, Passivated, Anti-fingerprint |
| Hardness | Soft, Hard, Full Hard or Customized |
| Coil ID | 508 mm / 610 mm |
| Coil Weight | 3 – 8 MT or Customized |
| Edge | Mill Edge / Slit Edge |
| Application | Roofing Sheet, Wall Panel, Duct, Appliance, Steel Structure, Fabrication |
| Packing | Standard Export Seaworthy Packing |
| Trade Terms | FOB, CFR, CIF, EXW |
Galvanized steel coil is a steel coil coated with a zinc layer to protect the steel from rust and corrosion. During the hot-dip galvanizing process, the steel surface reacts with molten zinc and forms a strong zinc-iron alloy layer and pure zinc surface layer.
Compared with ordinary carbon steel coil, galvanized steel coil has better corrosion resistance, longer service life, and wider application flexibility. It can be cut, slit, bent, roll-formed, stamped, welded, and processed into many finished products.
| Grade | Standard / Type | Common Use |
| SGCC | JIS Galvanized Steel | Roofing sheets, wall panels, general fabrication |
| SGCH | JIS Hard Galvanized Steel | High-strength forming and structural parts |
| DX51D | EN General Forming Grade | Roofing, wall cladding, ducts, steel profiles |
| DX52D | EN Drawing Grade | Better forming and bending applications |
| DX53D | EN Deep Drawing Grade | Complex forming and appliance panels |
| S280GD | Structural Grade | Construction and light steel structure |
| S350GD | High-strength Structural Grade | Load-bearing construction components |
| Q195 / Q235 | Chinese Standard Carbon Steel | General construction and sheet metal processing |
The zinc coating weight directly affects corrosion resistance and service life. A higher zinc coating usually provides stronger protection, especially for outdoor or humid environments.
| Zinc Coating | Description | Common Application |
| Z30 – Z60 | Light zinc coating | Indoor parts, light fabrication |
| Z80 – Z120 | Medium zinc coating | General construction, ducts, panels |
| Z180 | Higher corrosion protection | Outdoor roofing and wall panels |
| Z275 | Strong zinc protection | Roofing, construction, humid environments |
| Customized | Produced according to order requirements | Project-specific applications |
| Surface Type | Description |
| Regular Spangle | Traditional visible zinc crystal surface |
| Minimized Spangle | Smaller and more uniform zinc pattern |
| Zero Spangle | Smooth surface with almost no visible spangle |
| Big Spangle | Large zinc crystal appearance for decorative use |
| Oiled Surface | Helps reduce oxidation during storage and transport |
| Chromated Surface | Improves surface protection and storage stability |
| Anti-fingerprint Surface | Cleaner surface, suitable for appliances and panels |
Galvanized steel coil is one of the most widely used coated steel materials in construction, manufacturing, and industrial processing.
| Application Area | Typical Products |
| Roofing Materials | Corrugated roofing sheet, roofing panel, roof tile |
| Wall Cladding | Exterior wall panel, interior partition panel |
| HVAC Industry | Air duct, ventilation pipe, duct fittings |
| Steel Structure | Purlin, C/Z profile, light steel frame |
| Home Appliances | Refrigerator panel, washing machine shell, appliance parts |
| Door Industry | Garage door, rolling shutter, steel door panel |
| Agricultural Use | Greenhouse pipe, fencing, livestock equipment |
| General Fabrication | Cable tray, cabinet, container part, metal component |
The zinc coating protects the steel substrate from moisture, air, and oxidation, helping extend the service life of the finished product.
Galvanized steel coil can be supplied with regular spangle, minimized spangle, zero spangle, oiled, passivated, or anti-fingerprint surfaces to meet different market requirements.
GI coil can be cut, slit, roll-formed, bent, stamped, and welded, making it suitable for roofing sheet production, duct manufacturing, appliance panels, and steel fabrication.
Compared with stainless steel or other anti-corrosion materials, galvanized steel coil provides reliable rust protection at a more economical cost.
Thickness, width, zinc coating, coil weight, steel grade, hardness, and surface treatment can be customized according to customer requirements.
Galvanized steel coils are easy to transport, suitable for mass production, and widely accepted by construction material factories, steel distributors, and industrial buyers worldwide.
Henan GDD is a professional steel material supplier with experience in steel coil supply, processing, warehousing, inspection, and export service. We provide stable galvanized steel coil solutions for global buyers, steel distributors, roofing sheet factories, construction companies, and manufacturing plants.
| Advantage | Description |
| Stable Supply | Support regular stock and customized production |
| Multiple Grades | SGCC, DX51D, DX52D, DX53D, S280GD, S350GD available |
| Custom Specifications | Thickness, width, zinc coating, coil weight, and surface can be customized |
| Quality Control | Thickness, width, zinc coating, surface, and packing inspection |
| Export Packing | Standard seaworthy packing for long-distance shipment |
| Flexible Trade Terms | FOB, CFR, CIF, EXW accepted |
| One-stop Service | Quotation, production, inspection, documents, and shipment support |
Before shipment, Henan GDD can arrange quality inspection according to customer requirements.
| Inspection Item | Details |
| Thickness Inspection | Steel thickness and tolerance check |
| Width Inspection | Coil width and edge condition check |
| Zinc Coating Test | Zinc coating weight confirmation |
| Surface Inspection | Spangle, scratches, stains, rust, dents, and oil condition |
| Hardness Inspection | Soft, hard, or full hard confirmation if required |
| Coil Weight Check | Gross weight, net weight, and coil number verification |
| Packing Inspection | Waterproof packing, steel strip, edge protection, and shipping mark |
| Certificate | MTC and quality documents available |
Galvanized steel coils are packed with standard export seaworthy packing to protect the coils during handling, storage, and ocean transportation.
| Item | Details |
| Inner Packing | Waterproof paper and protective film |
| Outer Packing | Galvanized steel sheet or steel sheet cover |
| Edge Protection | Inner and outer edge protectors |
| Reinforcement | Steel strips and metal belt fixation |
| Coil ID | 508 mm / 610 mm |
| Loading Method | Container or bulk shipment |
| Shipping Documents | Commercial Invoice, Packing List, Bill of Lading, MTC, COO if required |
Carbon steel coil has no zinc coating and is easier to rust in humid or outdoor environments. Galvanized steel coil has a zinc coating, which provides better corrosion resistance and longer service life.
Common zinc coating options include Z30, Z60, Z80, Z100, Z120, Z180, and Z275. Customized zinc coating can also be supplied according to order requirements.
Yes. Galvanized steel coil is widely used as raw material for corrugated roofing sheets, wall panels, roof tiles, and construction panels.
We can supply regular spangle, minimized spangle, zero spangle, big spangle, oiled, chromated, passivated, and anti-fingerprint surfaces.
Yes. DX51D, DX52D, DX53D, SGCC, SGCH, S280GD, S350GD, Q195, Q235, and customized grades are available.
Please provide steel grade, thickness, width, zinc coating, spangle type, surface treatment, coil weight, quantity, destination port, and trade terms.
Yes. MTC can be provided with shipment. Third-party inspection is also available if required.
Looking for reliable galvanized steel coils for roofing, construction, appliances, or steel fabrication?
Send us your required grade, thickness, width, zinc coating, quantity, and destination port. Henan GDD will provide a professional quotation and suitable shipping solution.
