Hot-Dip Galvanized Steel Coil, Sheet & Plate | ASTM A123/A767 Supplier
Huaxiao-Alloy Hot-Dip Galvanized Steel (HDG) delivers zinc-based cathodic protection – sacrificing its coating to shield carbon steel from rust and degradation. With zinc adhesion >3,600g/m² and salt-spray resistance exceeding 2,000 hours (ASTM B117), our HDG steel extends asset lifespans by 3–5x in harsh environments.
TECHNICAL SPECIFICATIONS OF HOT-DIP GALVANIZED STEEL COIL, SHEET & PLATE
| Parameter | Huaxiao-Alloy HDG Steel | Industry Standard |
|---|---|---|
| Coating Mass (Zinc) | Z60-Z600 (60–600 g/m²) | ASTM A123 / EN ISO 1461 |
| Spangle Size | Zero-spangle/Minimal-spangle | ASTM A924 |
| Base Material | Commercial Steel (CS), HSLA, Structural | ASTM A653 / JIS G3302 |
| Thickness Range | 0.15–6.00 mm (±0.05mm tolerance) | EN 10346 |
| Surface Treatment | 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
| Industry | Components | Recommended Coating |
|---|---|---|
| Construction | Bridges, guardrails, rebar | Z275 (275g/m²) |
| Renewable Energy | Solar farm mounts, turbine towers | Z350 + Chromate |
| Agriculture | Silos, irrigation systems | Z200 |
| Transport | Highway gantries, truck frames | Z600 |
| Utilities | Transmission towers, substations | Z450 |
HUAXIAO-ALLOY VS. STANDARD HOT-DIP GALVANIZED STEEL COIL, SHEET & PLATE: THE DIFFERENCE
| Factor | Generic HDG | Huaxiao-Alloy HDG |
|---|---|---|
| Coating Adhesion | ≤120 DPN (Peel Test) | ≥150 DPN (EN 10346) |
| Salt Spray Resistance | 720–1,200 hrs | >2,000 hrs |
| Welding Performance | Spatter-prone, Zn fume issues | Controlled-spangle + Si-killed steel |
| Certification | Batch test reports only | Per-coil MTRs (EN 10204 3.1) |
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:
➤ Request Coating Selection Guide (Zinc vs. ZAM vs. Galvalume®)
➤ Download Corrosion Resistance Calculator (Project lifespan vs. environment)
➤ Get Custom Quote (Specify: Dimensions/coating class/base steel/quantity)
[DOWNLOAD GUIDE] • [IMMEDIATE QUOTE] • [CONTACT HDG SPECIALIST]
FAQs: HOT-DIP GALVANIZED STEEL (HDGI)
A: Huaxiao-Alloy’s Z275–Z600 coatings deliver:
- >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: Yes – with proper techniques:
- 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:
| Parameter | HDG (100% Zn) | Galvalume® (55% Al-Zn) |
|---|---|---|
| Salt Resistance | >2,000 hrs | >3,500 hrs |
| Heat Resistance | Stable to 200°C | Stable to 315°C |
| Cut Edge Protection | Sacrificial (cathodic) | Barrier-only |
| Best For | Structural, fasteners | Roofing, HVAC |
| Huaxiao supplies both – consult our selector guide. |
A: Yes – all offerings feature:
- 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:
| Project (20-year) | HDG Z350 | 304 Stainless |
|---|---|---|
| Material Cost | $18,500 | $67,800 |
| Maintenance | $0 | $48,000 (recoating) |
| Total Cost | $18,500 | $115,800 |
| Source: NACE IMPACT study + Huaxiao case data |
A: Three methods per ASTM A123:
- Magnetic Induction (non-destructive, mill-certified)
- Strip & Weigh (destructive, ±2% accuracy)
- XRF Scanning (for alloy verification)
Huaxiao provides per-coil thickness mapping reports.
A: All shipments include:
- 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: Our proprietary protocols:
- 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: Yes – capabilities include:
- 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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