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Galvanized Steel Strip
1. Product Overview
Galvanized steel strip is a protective steel product manufactured by applying a zinc coating onto cold-rolled or hot-rolled steel strip through hot-dip galvanizing process. This process provides the steel strip with excellent corrosion resistance and extended service life, while maintaining good mechanical properties and processing characteristics of steel. With its flexible size specifications and outstanding protective performance, galvanized steel strip is widely used in construction, automotive, home appliances, pipe wrapping, and various metal products manufacturing.
2. Key Features
（1） Excellent Corrosion Resistance
The zinc coating provides reliable barrier protection and cathodic protection for the steel strip, effectively preventing substrate oxidation and corrosion. When damaged, the zinc layer continues to protect the steel through sacrificial anode action, significantly extending product service life in humid and corrosive environments.
（2） Good Processability and Formability
Galvanized steel strip maintains the flexibility and strength of the base steel strip, allowing various processing such as bending, stamping, and stretching without cracking. The zinc coating has good adhesion and flexibility, preventing peeling or powdering during processing.
（3） Uniform Zinc Coating and Aesthetic Surface
Advanced hot-dip galvanizing process ensures uniform zinc coating thickness with smooth, flat surface. Consistent spangle size provides aesthetic appearance, meeting both protective and decorative requirements.
（4） Cost-effective and Eco-friendly
Compared to materials like stainless steel, galvanized steel strip offers significant cost advantages. The zinc coating provides long-term protection, reducing maintenance costs, and zinc is a recyclable eco-friendly material meeting sustainable development requirements.
3.Technical Parameters of Galvanized Steel Strip
Parameter | Specification Range | Standard / Notes |
Base Material | Q195, Q235, SPCC, DX51D, SAE1006 | GB/T, JIS, EN, ASTM |
Thickness | 0.1mm - 3.0mm | ±0.02mm tolerance |
Width | 10mm - 600mm | Customizable |
Zinc Coating Mass | 30-275 g/m² | Single/Double side |
Coating Type | Regular Spangle, Minimal Spangle, Smooth | - |
Tensile Strength | 270-500 MPa | ASTM A370 |
Yield Strength | 140-350 MPa | ASTM A370 |
Elongation | 20%-35% | in 50mm |
Hardness | 50-95 HRB | Rockwell B Scale |
Surface Treatment | Chromated, Oiled, Untreated | - |
Coil ID | 508mm / 610mm | Standard |
Coil OD | 800mm - 1600mm | Maximum 2000mm |
Coil Weight | 1-10 tons | Maximum 15 tons |
Edge Condition | Mill edge, Slit edge, Deburred | - |
Flatness | ≤5mm/m | For thickness ≥0.5mm |
4. Application Scenarios
(1)Construction and Structural Applications
Used for light steel keels, building frameworks, roof supports, and other structural components. The corrosion resistance of galvanized steel strip ensures long-term stability of building elements in humid environments while reducing structural weight and construction costs.
(2)Automotive and Transportation
Applied in automotive seal frames, seat frames, safety belt components, and other auto parts. Its good formability and corrosion resistance meet the automotive industry's strict requirements for part precision and durability.
(3)Home Appliances and Electronic Products
Used in air conditioner housings, refrigerator brackets, washing machine frames, and other appliance components. Galvanized steel strip provides excellent appearance protection and structural support, ensuring reliability and service life of appliances in humid environments.
5. FAQs
Q1: How should the thickness of the zinc coating on galvanized steel strips be determined?。
A1: Choose based on usage environment: 30-60g/m² for indoor dry environments, 90-120g/m² recommended for outdoor general environments, and over 150g/m² for highly corrosive environments.
Q2: Can galvanized steel strips be welded?
A2: Yes, but requires special processes. Recommend using gas shielded welding, remove zinc coating from welding area before welding, and clean welding slag promptly after welding to ensure quality.
Q3: What are the storage requirements for galvanized steel strips?
A3: Should be stored in dry, ventilated indoor environments, avoiding contact with corrosive substances like acids and alkalis. Use dunnage when stacking to prevent moisture, recommended storage period not exceeding 6 months.
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