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Superior Galvanized Steel Coil | Enhanced Corrosion Protection Coils
Superior Galvanized Steel Coil | Enhanced Corrosion Protection Coils
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Superior Galvanized Steel Coil | Enhanced Corrosion Protection Coils
Product Specifications
| Parameter | Details |
|---|---|
| Material | Galvanized Steel Coil (Base Steel: DX51D, DX52D, DX53D, S220GD+Z) |
| Coating Type | Zn-Al-Mg Alloy Coated (275g/m² Zinc Layer) |
| Thickness | 0.12mm–3.0mm (±0.02mm Tolerance) |
| Width | 600mm–1500mm (Customizable) |
| Hardness | HRB 45–85 (Tested per ASTM E18) |
| Surface Treatment | Passivation, Chromate-Free, Anti-Fingerprint Finish |
| Tensile Strength | 270MPa–550MPa (Dependent on Grade) |
| Yield Strength | 140MPa–420MPa |
| Elongation | 22%–35% (Per ASTM A370) |
| Standard | ASTM A653, EN 10346, JIS G3302 |
Key Attributes & Benefits
- Enhanced Corrosion Resistance: The galvanized sheet metal coils utilize a Zn-Al-Mg alloy coating, providing 3–5× longer lifespan than traditional galvanized steel in harsh environments (e.g., coastal or industrial zones)
. - Heat Insulation: Unique micro-porous oxide layer reduces thermal conductivity by 15%, ideal for roofing and HVAC applications.
- Mechanical Strength: High steel galvanized coil rigidity ensures durability under heavy loads, with a bending radius as low as 1× thickness.
- Aesthetic Flexibility: Available in smooth, spangled, or embossed finishes, compatible with PVDF or polyester coatings.
Performance Details
Tensile & Bend Strength
Our galvanized steel coil undergoes rigorous testing to meet global standards. The tensile strength (270–550MPa) ensures structural integrity, while the bend strength (180° cold bending without cracking) guarantees adaptability in complex fabrication processes. For critical applications, we recommend DX54D+Z grade with a tensile strength ≥340MPa and elongation ≥26%.
Weight Calculation Formula
Calculate coil weight using:
Weight (kg) = Thickness (mm) × Width (m) × Length (m) × 7.85
Example: A 1.2mm × 1000mm × 200m coil weighs 1.2 × 1 × 200 × 7.85 = 1,884kg.
Identification & Marking
Each steel galvanized coil is laser-marked with:
- Grade (e.g., S350GD+Z)
- Coating weight (e.g., ZM 275)
- Production batch number (ISO 9001 traceability)
Why Stainless Steel Can Rust?
Despite its name, stainless steel is not entirely rust-proof. Rusting occurs due to:
- Breakdown of Passive Layer: Chromium oxide (Cr₂O₃) forms a protective layer, but physical damage (scratches) or chemical exposure (chlorides) disrupts this layer, exposing the iron base to oxidation.
- Chloride Attack: Chloride ions in seawater, de-icing salts, or cleaning agents penetrate the passive layer, causing pitting corrosion. For example, 304 stainless steel fails in coastal environments, while 316 grade (with molybdenum) resists chloride-induced rust.
- Galvanic Corrosion: Contact with dissimilar metals (e.g., carbon steel screws) creates electrochemical cells, accelerating rust formation.
- Environmental Factors: High humidity, acidic pollutants (SO₂, NOₓ), or organic residues (food, grease) create corrosive electrolytes on the surface.
Why Choose Our Galvanized Steel Coils?
- Superior Material Science: Our galvanized sheet metal coils integrate Zn-Al-Mg coatings, proven to resist red rust for 20+ years even in pH 2–12 environments.
- Precision Engineering: Tolerances as tight as ±0.02mm ensure seamless fabrication, reducing material waste by 12%.
- Eco-Certified: REACH and RoHS compliant, with chromate-free passivation for sustainable construction.
- Global Compliance: Meets ASTM, EN, JIS, and GB standards, backed by 15-year quality assurance.
- Custom Solutions: Tailored dimensions, coatings, and hardness profiles for aerospace, automotive, and architectural projects.
