Hot-Dip Galvanized Steel Coil, Sheet & Plate | ASTM A123/A767 Supplier
Huaxiao-Alloy Hot-Dip Galvanized Steel (HDG)
TECHNICAL SPECIFICATIONS OF HOT-DIP GALVANIZED STEEL COIL, SHEET & PLATE
| Parameter | Industry Standard | |
|---|---|---|
| Z60-Z600 (60–600 g/m²) | ASTM A123 / EN ISO 1461 | |
| Zero-spangle/Minimal-spangle | ASTM A924 | |
| Commercial Steel (CS), HSLA, Structural | ASTM A653 / JIS G3302 | |
| 0.15–6.00 mm (±0.05mm tolerance) | EN 10346 | |
| Chromate passivation (Cr⁶⁺-free options) | RoHS/REACH compliant |
Key Advantages:
Seamless Coverage: Uniform zinc layer seals edges/corners Dual-Phase Protection: Barrier + sacrificial anode action Sustainability: 100% recyclable steel with low carbon footprint
Key Advantages:
Seamless Coverage: Uniform zinc layer seals edges/corners Dual-Phase Protection: Barrier + sacrificial anode action Sustainability: 100% recyclable steel with low carbon footprint
APPLICATIONS: WHERE LONGEVITY MATTERS
| Bridges, guardrails, rebar | Z275 (275g/m²) | |
| Solar farm mounts, turbine towers | Z350 + Chromate | |
| Silos, irrigation systems | Z200 | |
| Highway gantries, truck frames | Z600 | |
| Transmission towers, substations | Z450 |
HUAXIAO-ALLOY VS. STANDARD HOT-DIP GALVANIZED STEEL COIL, SHEET & PLATE: THE DIFFERENCE
| ≤120 DPN (Peel Test) | ||
| 720–1,200 hrs | ||
| Spatter-prone, Zn fume issues | Controlled-spangle + Si-killed steel | |
| Batch test reports only |
WHY SOURCE HOT-DIP GALVANIZED STEEL COIL, SHEET & PLATE FROM HUAXIAO-ALLOY?
- Vertical Integration:
Direct sourcing from ISO 9001-certified mills (Tata, NLMK, Posco) - Custom Processing:
Slitting (<0.2mm burr), leveling, anti-fingerprint coating - Global Logistics:
FOB China or bonded stocks in Rotterdam/Houston/Singapore - Compliance:
ASTM A123, EN ISO 1461, JIS G3302, AS/NZS 4680
Secure Long-Term Structural Integrity:
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FAQs: HOT-DIP GALVANIZED STEEL (HDGI)
A:
>50 years in ISO 9223 C3 (low-corrosivity) 25–40 years in C5-M (coastal/industrial) per ISO 12944
Verified by ASTM B117 salt-spray tests exceeding 2,000 hours.
A:
- Use
Si-killed base steel (reduces Zn fuming) Pre-treat welding zones (grind-to-base + Zn-rich primer) Post-weld: Apply zinc-rich spray (ASTM A780 repair spec)
Huaxiao supplies weld-ready HDG with ≤15% Zn loss in HAZ zones.
A: Critical differences:
| >2,000 hrs | >3,500 hrs | |
| Stable to 200°C | Stable to 315°C | |
| Sacrificial (cathodic) | Barrier-only | |
| Structural, fasteners | Roofing, HVAC | |
| Huaxiao supplies both – consult our selector guide. |
A:
Cr(VI)-free passivation (RoHS Annex II compliant) Full Material Declarations (REACH SVHC <0.1% w/w) Green certifications: ISO 14064, EPD 2024-0001
A: HDG saves 40–70% lifecycle costs:
| Material Cost | $18,500 | $67,800 |
| Maintenance | $0 | $48,000 (recoating) |
| Source: NACE IMPACT study + Huaxiao case data |
A:
Magnetic Induction (non-destructive, mill-certified) Strip & Weigh (destructive, ±2% accuracy) XRF Scanning (for alloy verification)
Huaxiao provides per-coil thickness mapping reports.
A:
EN 10204 3.1/3.2 Certificates Coating weight verification (ISO 1461 Annex A) Chemical composition (base steel) Origin tracing (mill HSM coil number)
A:
VCI (Vapor Corrosion Inhibitor) paper wrapping Chromate-free anti-sweat treatment Desiccant packs in containers
Guarantees >99.9% rust-free arrival.
A: Yes – superior to bare steel when:
Surface prep: Brush blast to profile Sa2.5 (ISO 8501) Primer: Etch primer (zinc phosphate/epoxy) Topcoat: PU/fluoropolymer systems
Result: 2–3x longer paint adhesion vs. ungalvanized steel.
A:
Plasma Cutting: Thickness ≤100mm (ISO 9013) Tolerance: ±1.5mm on perimeter, ±0.5° on bevels Packaging: VCI + edge protectors for export
Hot-Dip Galvanized Steel Coil, Sheet & Plate | ASTM A123/A767 Supplier
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