Industrial High-Strength G90 Galvanized Steel Sheet
Our galvanized steel sheets are produced with premium zinc for construction. We supply durable, rust-resistant wholesale materials worldwide.
Superior Corrosion Resistance๏ผ
Cost-Effective๏ผ
Excellent Formability๏ผ
Versatile Applications
GI Steel sheet Data Sheet
| Galvanized Steel Sheets Specification | |
| Standard | JIS G3302,ย EN10346,ย ASTM A653M |
| Grade | SGCC,SGCH,SGCD1,SGCD2, SGC -340,400,440,490,570 |
| DX51D, DX52D, DX53D, DX54D, S220GD, S250GD, S280GD, S320GD, S350GD, S450GD, S550GD | |
| CS Type A,B,Cย FS; Type A,B; DDS, EDDS; SS Grade 33,37,40,50,80 | |
| Zinc Coating | Z30-600G/M2 |
| Spangle Model | Zero Spangle, Small Spangle, Regular Spangle, Big Spangle |
| Thickness | 0.12-6.00MM |
| Width | 600-1500MM |
| Length | 1000-4000MM or Customized |
| Packaged Weight | 3-5MT/Pallet or Customized |
| Package | Standard Seaworthy Exporting Packing |
| MOQ | 25MT |
| Capacity | 7000MT/Month |
| Transport Type | Vessel Container, Vessel Bulk, Railway Container, Railway Wagon |
| Loading Port | Tianjin, Qingdao, Ningbo, Shanghai and other Chinaโs port |
| Delivery Time | 15-25 Days after Receiving the Deposit |
| Terms of Trade | EXW, FOB, CFR, CIF |
| Terms of Payment | T/T and Irrevocable LC at Sight |
Galvanized Steel Sheet Description
Galvanized Steel Sheets is manufactured through a hot-dip zinc coating process to provide durable corrosion protection for construction and industrial fabrication. As a professional steel manufacturer and bulk supplier, we offer sheets with Z30โZ275 coating, thickness from 0.12โ6.0mm and customizable sizes to meet diverse project needs. Compared with galvanized-steel-coil, Galvanzied steel sheets are ready for direct processing and installation. Widely used by roofing contractors, equipment makers and distributors, our galvanized steel sheets help reduce maintenance costs and ensure long-term structural reliability.
Galvanized Steel sheets Applications
Sheet Metal Fabrication & Stamping Parts
Galvanized steel sheets is widely used for stamping and precision fabrication. Its flat surface and controlled thickness tolerance make it suitable for electrical cabinets, enclosures and industrial components that require accurate cutting and bending.
HVAC & Ventilation Systems
Due to its corrosion-resistant zinc coating, galvanized steel sheet is commonly applied in air ducts, ventilation channels and HVAC systems where moisture protection and durability are essential.
Equipment Housing & Machinery Covers
Industrial equipment manufacturers use galvanized steel sheets for machine panels and protective covers. The material provides mechanical strength while reducing rust risk in semi-outdoor environments.
Structural Reinforcement Plates
Unlike coils, galvanized steel sheets can be directly used as base plates, reinforcement panels and structural brackets in construction projects requiring rigid flat components.
Automotive Inner Panels
In non-exposed automotive parts, galvanized steel sheet offers cost-effective corrosion resistance and good stamping performance for internal body components.
Storage Racks & Industrial Shelving
The high strength and flat form make galvanized steel sheet ideal for storage systems, warehouse shelving and light-duty structural support elements.
Steel sheet Work Flow Chart
Standard export package
Covered with a layer of inside anti-water craft paper, middle PVC plastic film and outside 0.45mm thick steel sheet, packed on the iron pallets, bound with iron belt strip.
WITOP steel can pack steel roofing sheet based on customerโs requirement.
Hot Dip Galvanized Steel Sheet
| Hot Dip Galvanized Steel Sheets | |||||
| GB T 2518 | JIS G 3302 | ASTM A653M | EN10346 | Application | |
| Specifications | DX51D | SGCCใSGHC | CS Type C | DX51D | Commercial |
| DX52D | SGCD1 | CS Type A ใCS Type B | DX52D | Commercial Hard | |
| DX53D | SGCD2 | FS Type AใFS Type B | DX53D | Drawing, Class 1 | |
| DX54D | SGCD3 | DDS Type C | DX54D | Drawing, Class 2 | |
| DX56D | SGCD4 | DDS Type A | DX56D | Drawing, Class 3 | |
| DX57D | โ | EDDS | DX57D | Drawing, Class 4 | |
| S220GD | โ | SS230 [SS33] | S220GD | Structural Quality | |
| S250GD | SGC340 | SS255 [SS37] | S250GD | ||
| S280GD | SGC400 | SS275 [SS40] | S280GD | ||
| S320GD | โ | โ | S320GD | ||
| S350GD | SGC440 | SS340 [SS50] class 4 | S350GD | ||
| S550GD | SGC570 | SS550 [SS80] class 2 | S550GD | ||
| Coating Mass | Z30~Z600 | Z30~Z600 | Z90-Z600 | Z80~Z600 | โ |
| Surface Finish | Zero,Small,Regular,Large | ||||
| Surface Treatment | Chromating, Oiled, Skin-pass or Green Treatment | ||||
| Remarks | 1. Tolerance for thickness, width, flatness and so on conforms to individual product specification. | ||||
| 2. All products with thickness 2.0mm and under can be skin passed. | |||||
| 3. The coil inside diameter can be either 508mm or 610mm. The maximum coil outside diameter is 2000mm. | |||||
| 4. Please make inquiries to our Sales & Marketing Division for products with special specifications. | |||||
| 5. Coating mass beyond the specifications above can be provided by Witop Steel. upon mutual agreement between customers and us. |
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FAQ โ Galvanized Steel Sheet
Galvanized steel sheets is a flat steel product coated with a layer of zinc to protect the base steel from corrosion. The zinc coating is typically applied through a hot-dip galvanizing process, which significantly improves durability and resistance to rust.
Galvanized steel sheets is widely used in:
Roofing sheets and wall panels
Construction structures
HVAC ducts and ventilation systems
Automotive components
Electrical cabinets and enclosures
Agricultural equipment
Industrial fabrication
It is one of the most common materials used in construction and metal fabrication industries.
Product Description Typical Use
Galvanized Steel Coil Steel rolled into coils Roll forming, continuous processing
Galvanized Steel Sheet Flat cut sheet from coil Fabrication, stamping, panels
Steel sheets are usually produced by cutting galvanized steel coils into specific lengths.
Typical thickness ranges include:
Thickness Application
0.12 โ 0.30 mm Roofing sheets
0.30 โ 0.80 mm Construction panels
1.0 โ 3.0 mm Industrial fabrication
3.0 โ 4.0 mm Structural applications
Custom thickness can be supplied depending on project requirements.
Common zinc coating weights include:
Zinc Coating Typical Use
Z60 Indoor applications
Z80 โ Z120 Standard construction
Z180 Outdoor construction
Z275 High corrosion resistance
Higher zinc coatings provide better corrosion protection and longer service life.
Standard sheet sizes typically include:
Width Length
1000 mm 2000 mm
1200 mm 2400 mm
1250 mm 2500 mm
Sheets can also be cut to custom length according to project requirements.
Common surface types include:
Regular spangle
Minimized spangle
Zero spangle
Oiled surface
Dry surface
Anti-fingerprint coating
The surface finish can be selected based on processing and aesthetic requirements.
Yes. Galvanized steel sheets performs well in outdoor environments because the zinc coating protects the steel from oxidation. For outdoor construction or roofing, Z180โZ275 coatings are commonly recommended.
Yes. Galvanized steel sheets can be painted after proper surface preparation. Many manufacturers use galvanized sheets as the base material for color coated steel sheets (PPGI) used in roofing and wall cladding.
Major bulk buyers include:
Roofing sheet manufacturers
Steel distributors and wholesalers
Construction companies
HVAC manufacturers
Electrical equipment manufacturers
Industrial fabrication workshops
Bulk orders typically range from 10 to 200 tons depending on the buyer type.
Common international standards include:
ASTM A653 / ASTM A924
EN 10346
JIS G3302
GB/T 2518
These standards define coating weight, mechanical properties, and tolerances.
Export packaging usually includes:
Waterproof paper protection
Plastic film covering
Steel strapping
Wooden pallets or skids
Proper packaging protects the sheets from moisture, scratches, and deformation during shipping.
Material Coating Corrosion Resistance
Cold Rolled Steel No coating Low
Galvanized Steel Sheet Zinc coating High
Galvanized steel sheets are preferred for outdoor and humid environments.
The lifespan depends on zinc coating and environment.
Typical service life:
Indoor environments: 30โ50 years
Rural environments: 20โ30 years
Industrial or coastal areas: 10โ20 years
Higher zinc coatings significantly increase durability.
Key factors include:
Consistent zinc coating thickness
Accurate sheet dimensions and tolerances
Stable raw material quality
Export packaging capability
Reliable delivery time
Ability to supply bulk orders
Many buyers prefer working with direct steel manufacturers for stable supply.
