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| Property | Parameter | Description |
|---|---|---|
| Product Name | Galvanized Structural Steel for Construction | Hot-dip or electro-galvanized structural steel sections and plates used in building and civil engineering |
| Material Grade | S235JR / S355JR / A36 / A572 Gr.50 / Q235B / Q355B | International equivalents: EN 10025 (S235/S355), ASTM A36/A572, GB/T 1591 (Q355B) |
| Standard Compliance | ASTM A123 / EN ISO 1461 / GB/T 13912 / JIS H 8641 | Governs hot-dip galvanizing coating thickness and adhesion requirements for structural steel |
| Chemical Composition (C) | ≤ 0.20% (S235) / ≤ 0.23% (S355) | Low carbon content ensures good weldability and galvanizing compatibility |
| Chemical Composition (Mn) | ≤ 1.50% | Manganese enhances strength and toughness of the base steel |
| Chemical Composition (P / S) | P ≤ 0.035% / S ≤ 0.035% | Controlled phosphorus and sulfur minimize brittleness and improve coating adhesion |
| Chemical Composition (Si) | ≤ 0.50% | Silicon content managed to avoid Sandelin effect during hot-dip galvanizing |
| Tensile Strength | 360–510 MPa (S235) / 470–630 MPa (S355) | Per EN 10025-2; ASTM A36: 400–550 MPa; suitable for load-bearing structural applications |
| Yield Strength | ≥ 235 MPa (S235) / ≥ 355 MPa (S355) | Minimum yield strength at thickness ≤ 16 mm per EN 10025-2; ASTM A36: ≥ 250 MPa |
| Elongation | ≥ 26% (S235) / ≥ 22% (S355) | Measured on gauge length L0 = 5.65√S0; ensures ductility for seismic and dynamic loads |
| Zinc Coating Thickness | 45–85 μm (average) / ≥ 35 μm (local min.) | Per ASTM A123 / EN ISO 1461; coating mass typically 305–610 g/m²; provides 20–50 years corrosion protection |
| Dimension Range | Thickness: 3–100 mm; Width: 100–3000 mm; Length: 3000–12000 mm | Available in I-beam, H-beam, angle, channel, flat bar, and plate; custom cutting available |
| Surface Finish | Hot-dip galvanized (HDG) / Electro-galvanized / Galvannealed | Bright spangled or matte finish; uniform zinc layer with no bare spots, blisters, or flux inclusions |
| Application | Building frames, bridges, transmission towers, industrial platforms, highway guardrails, prefabricated structures | Ideal for outdoor and corrosive environments requiring long-term structural integrity |
| Certification | ISO 9001 / CE Marking (EN 1090) / Mill Test Certificate (EN 10204 3.1/3.2) | Third-party inspection by SGS, BV, TÜV available upon request |
| Packaging | Steel-banded bundles with wooden dunnage; waterproof wrapping for export | Bundle weight typically 2–5 MT; sea-worthy packing per ISPM 15 for international shipment |
| MOQ | 5 MT per size / 25 MT per order | Mixed specifications accepted; OEM and custom fabrication available for large projects |
Quality is there — early shipment had a surface finish inconsistency, now resolved
Ordered 40 tonnes of galvanized angle (L90×90×9) and channel sections for agricultural shed framing in Queensland. First shipment had visible uncoated spots on roughly 3% of angle pieces — likely flux inclusions during galvanizing. Raised the issue immediately; supplier arranged replacement pieces and issued a corrective action report within one week, citing a bath contamination event that has since been rectified. Second and third deliveries were clean, coating mass confirmed above 325 g/m². MTRs and ASTM A36 mechanical data were always accurate. Appreciate the responsive handling — will continue cautiously with closer incoming inspection.
Ordered 40 tonnes of galvanized angle (L90×90×9) and channel sections for agricultural shed framing in Queensland. First shipment had visible uncoated spots on roughly 3% of angle pieces — likely flux inclusions during galvanizing. Raised the issue immediately; supplier arranged replacement pieces and issued a corrective action report within one week, citing a bath contamination event that has since been rectified. Second and third deliveries were clean, coating mass confirmed above 325 g/m². MTRs and ASTM A36 mechanical data were always accurate. Appreciate the responsive handling — will continue cautiously with closer incoming inspection.
