Q195 / Q235B Galvanized Coil – Stable steel substrate with zinc-coated surface protection.
Custom Width Options – 900-1000 mm, 1001-1250 mm, 1251-1500 mm, and wider sizes available.
Flexible Thickness Range – 0.12 mm to 6.00 mm can be supplied according to project needs.
Zinc Coating Options – Z10-Z275 or customized coating weight for different applications.
Surface Choices – Regular spangle, minimized spangle, zero spangle, oiled, or passivated finish.
Roofing & Construction Use – Suitable for roof sheets, wall panels, ducts, profiles, and fabrication.
Export Ready Supply – MTC, inspection support, seaworthy packing, FOB, CIF, and CFR available.
Galvanized steel coil is a coated steel product made by applying a protective zinc layer onto the surface of steel coil. The zinc coating helps protect the steel substrate from rust, moisture, oxidation, and general environmental corrosion.
Q195 and Q235B galvanized steel coils are widely used in construction material production because they offer stable mechanical properties, good processing performance, and cost-effective corrosion protection. They can be slit, cut, bent, roll-formed, stamped, welded, and processed into roofing sheets, wall panels, steel profiles, ducts, cabinets, and other metal products.
Henan GDD supplies galvanized steel coils in different grades, thicknesses, widths, zinc coatings, spangle types, hardness levels, and surface treatments. We support steel distributors, roofing sheet factories, construction material manufacturers, appliance factories, and global project buyers.
| Item | Specification |
|---|---|
| Product Name | Galvanized Steel Coil / GI Coil |
| Material | Q195, Q235B, DX51D, DX52D, DX53D, SGCC, SGCH, S280GD, S350GD or Customized |
| Base Steel | Cold Rolled Steel / Hot Rolled Steel |
| Standard | ASTM A653, JIS G3302, EN 10346, GB/T 2518 or Customized |
| Thickness | 0.12 mm – 6.00 mm or Customized |
| Width | 600 mm – 2000 mm or Customized |
| Common Width | 900-1000 mm, 1001-1250 mm, 1251-1500 mm, 1501-2000 mm |
| Zinc Coating | Z10 – Z275 or Customized |
| Spangle Type | Regular Spangle, Minimized Spangle, Zero Spangle, Big Spangle |
| Surface Treatment | Oiled, Dry, Chromated, 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, Steel Structure, Appliance, Metal Fabrication |
| Packing | Standard Export Seaworthy Packing |
| Trade Terms | FOB, CFR, CIF, EXW |
Galvanized steel coil is a steel coil coated with zinc to improve corrosion resistance. During production, the steel substrate passes through a zinc coating process, forming a protective zinc layer on the steel surface.
Compared with ordinary carbon steel coil, galvanized steel coil has better anti-rust performance and longer service life. It is widely used in construction, roofing, wall cladding, ventilation systems, home appliances, light steel structures, and general metal processing.
For buyers who need economical and durable steel materials, galvanized steel coil is one of the most practical choices.
| Steel Grade | Feature | Common Application |
| Q195 | Good formability and economical cost | Light fabrication, roofing sheets, ducts |
| Q235B | Good strength and wide availability | Construction materials, panels, profiles |
| DX51D | General forming grade | Roofing, wall panels, roll forming |
| DX52D | Better drawing performance | Bending and forming applications |
| DX53D | Deep drawing grade | Appliance panels and complex forming |
| SGCC | JIS galvanized steel grade | Roofing sheets, panels, general fabrication |
| SGCH | Higher hardness grade | Structural and high-strength applications |
| S280GD / S350GD | Structural galvanized steel | Steel structures, purlins, profiles |
The zinc coating weight affects corrosion resistance, service life, and final product cost. Customers can choose different zinc coating levels according to application environment and budget.
| Zinc Coating | Description | Suitable Application |
| Z10 – Z30 | Light zinc coating | Indoor use, light fabrication, short-term protection |
| Z40 – Z80 | General zinc coating | Ducts, panels, cabinets, general processing |
| Z100 – Z120 | Medium zinc coating | Roofing sheets, wall panels, construction materials |
| Z180 | Higher corrosion protection | Outdoor construction and humid environments |
| Z275 | Strong zinc protection | Roofing, industrial buildings, harsh environments |
| Customized | Produced according to order requirements | Project-specific use |
Henan GDD can supply different galvanized coil surface types according to customer market requirements.
| Surface Type | Description |
| Regular Spangle | Traditional visible zinc crystal pattern |
| Minimized Spangle | Smaller and more uniform surface pattern |
| Zero Spangle | Smooth surface with almost no visible zinc flower |
| Big Spangle | Large zinc pattern for decorative or market-specific demand |
| Oiled Surface | Helps reduce oxidation during storage and transportation |
| Passivated Surface | Improves temporary anti-corrosion protection |
| Anti-fingerprint Surface | Cleaner surface, suitable for appliances and panels |
Galvanized steel coil is widely used as a raw material for construction and industrial manufacturing.
| Application Area | Typical Finished Products |
| Roofing Materials | Corrugated roofing sheet, roof tile, metal roofing panel |
| Wall Cladding | Exterior wall panel, interior wall panel, partition board |
| HVAC Industry | Air duct, ventilation pipe, duct fittings |
| Steel Structure | C/Z purlin, light steel frame, structural profile |
| Door Industry | Garage door, rolling shutter, steel door panel |
| Appliance Industry | Refrigerator panel, washing machine shell, appliance parts |
| Agricultural Use | Greenhouse parts, fencing, livestock equipment |
| General Fabrication | Cable tray, cabinet, container part, sheet metal component |
The zinc coating provides effective protection against rust and oxidation, making galvanized steel coil suitable for both indoor and outdoor applications.
Galvanized steel coil can be cut, slit, bent, stamped, welded, and roll-formed into different finished products.
Thickness, width, zinc coating, coil weight, steel grade, hardness, and surface treatment can be customized according to order requirements.
Compared with stainless steel or other corrosion-resistant materials, galvanized steel coil provides practical anti-rust performance at a more economical cost.
GI coil is commonly used as raw material for corrugated roofing sheets, roof tiles, wall panels, and construction panels.
Coils are packed with seaworthy export packing to protect them during long-distance transportation.
Henan GDD is a reliable steel material supplier with experience in steel coil supply, processing, warehousing, inspection, and export service. We provide galvanized steel coil solutions for steel distributors, roofing sheet factories, construction companies, appliance manufacturers, and industrial buyers.
| Advantage | Description |
| Stable Supply | Support regular stock and customized production |
| Multiple Grades | Q195, Q235B, DX51D, SGCC, SGCH and structural grades available |
| Custom Specifications | Thickness, width, zinc coating, hardness and coil weight can be customized |
| Quality Inspection | Thickness, width, zinc coating, surface and packing inspection available |
| Export Service | Support export documents, loading photos and shipment arrangement |
| Flexible Trade Terms | FOB, CFR, CIF and EXW available |
| One-stop Support | Quotation, production, inspection, packing and shipping support |
Before shipment, Henan GDD can arrange 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, edge protection, steel strip 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 |
| Documents | Commercial Invoice, Packing List, Bill of Lading, MTC, COO if required |
Ordinary carbon steel coil has no zinc coating and is easier to rust. Galvanized steel coil has a zinc-coated surface, which provides better corrosion resistance and longer service life.
Yes. Q195, Q235B, DX51D, DX52D, DX53D, SGCC, SGCH and other grades can be supplied according to customer requirements.
We can supply Z10, Z30, Z60, Z80, Z100, Z120, Z180, Z275 and customized zinc coating weights.
Yes. Galvanized steel coil is widely used for corrugated roofing sheets, roof tiles, wall panels and other construction materials.
Common width ranges include 900-1000 mm, 1001-1250 mm, 1251-1500 mm and 1501-2000 mm. Custom widths can also be supplied.
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 the shipment. Third-party inspection can also be arranged if required.
Looking for galvanized steel coils for roofing, construction or metal 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.
