Hot Dipped Galvanized Steel Coils 0.3mm-5mm HDG Coils Zinc Coating 80-350g/M2 ASTM A123
HDG Steel Coils 0.3-5mm Zinc Coating 80-350g/M² ASTM A123 Compliance
Hot-Dip Galvanized (HDG) Steel Coils are engineered for extreme environments, offering unmatched corrosion resistance and structural integrity. With a zinc coating range of 80–350g/m² (Z80 to Z350 grades) and thicknesses from 0.3mm to 5mm, these coils comply with ASTM A123, EN 10346, and JIS G3302 standards, making them ideal for construction, energy, and heavy machinery sectors. The HDG process ensures full-surface zinc adhesion, delivering 20–50 years of rust-free performance in coastal, industrial, or high-UV regions.
Key Benefits:
- Adjustable Corrosion Protection: Choose zinc coatings from 80g/m² (light-duty) to 350g/m² (marine-grade) for project-specific needs.
- Global Compliance: ASTM A123, EN 10346, JIS G3302, and AS/NZS 4680 certified for international projects.
- Cost Efficiency: 25% lower lifecycle costs vs. stainless steel, with minimal maintenance.
- Versatile Dimensions: Widths 600–2,000mm (standard 1,000–1,500mm), ID/OD tailored for automated processing.
- Eco-Friendly: 70% recycled steel content, ISO 14001-certified production with low VOC emissions.
- Fast Turnaround: 12–18 days lead time for bulk orders (20+ tons), including custom punching or slitting.
2. Technical Specifications
| Parameter | Details |
|---|---|
| Base Material | Low-Carbon Steel (C: 0.05–0.15%, Mn: 0.20–0.60%, P ≤0.04%, S ≤0.05%) |
| Coating Type | Hot-Dip Galvanized (Zinc: 80–350g/m² ±10%), spangle-free or regular finish |
| Grades | ASTM A123 (Grade 33–80), EN 10346 (S220GD–S550GD), JIS G3302 (SGCC/SGH340) |
| Thickness Range | 0.3mm–5mm (±0.03mm for ≤1mm, ±0.05mm for >1mm) |
| Coil Dimensions | Width: 600–2,000mm (±2mm), ID: 508/610mm, OD: 1,200–2,500mm |
| Mechanical Properties | Tensile Strength: 330–650 MPa, Yield Strength: 230–550 MPa, Elongation: 12–30% |
| Surface Treatment | Chromate-free passivation, oiled (0.5–3g/m²) or dry film options |
| Certifications | ASTM A123, ISO 1461, CE Mark, RoHS, TUV, ISO 9001/14001 |
| Key Applications | Power transmission towers, agricultural machinery, shipbuilding, and industrial ducting |
3. Why Import Our ASTM A123 HDG Steel Coils?
Competitive Advantages:
- Price Leadership: 25–30% cheaper than EU/US suppliers with identical ASTM A123 certification.
- Quality Assurance: Third-party tested for coating adhesion (≥95%), salt spray resistance (1,500–5,000 hours), and bendability (0T–3T).
- Custom Solutions: Pre-weathered (patina) finishes, embossed anti-slip surfaces, or pre-punched holes.
- Advanced Logistics: Seaworthy packaging (VCI film + edge guards) with real-time shipment tracking.
- Sustainability: Carbon footprint reports and CBAM compliance for EU importers.
- Technical Expertise: Free material substitution analysis and welding guidelines for fabricators.
4. Heavy-Duty Industrial Applications
| Industry | Use Cases |
|---|---|
| Energy Infrastructure | Power line towers, transformer housings, solar farm grounding systems. |
| Agriculture | Combine harvester frames, irrigation pipes, livestock feeding troughs. |
| Marine & Offshore | Ship bulkheads, dock gratings, oil rig walkways. |
| Construction | Steel trusses, warehouse purlins, prefab building modules. |
| Transportation | Railway bridges, truck trailers, cargo container reinforcements. |
| Mining | Conveyor belt supports, crusher machine housings, ore chutes. |
| Utilities | Water treatment tanks, telecom tower bases, HVAC ducting. |
FAQ
1. Do you have your own factory?
Yes, we do. We have our own factory, we can provide stable inventory, competitive prices and good quality.
2. What is your surface treatment method?
We can make special logos, icons or other things you order on the products. No matter what, we can do it as per your request.
3. What kind of payment can you accept?
1).100% irrevocable L/C at sight.
2).30% T/T in advance, the balance according to the copy of the bill of lading.
3).30% T/T in advance and balance of L/C.
4. How about the delivery time?
5-7 days after deposit received.
5. Why choose our company?
A). We have more stable inventory, competitive prices and good quality.
B). We have more integrity experience in international trade.
C). We can provide personal customization services, such as adding your company's logo, specified colors, etc. to the product.
6. What is the use of the product?
Galvanized Steel Coils, industry, chemical industry, secondary processing, construction, etc.
7. Can you send samples for inspection?
We can. We can send you samples for free.
8. Can you make products according to our requirements?
Yes, we will strictly follow your requirements, such as packaging method, product length, product handling method, etc.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.