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| Property | Parameter | Description |
|---|---|---|
| Product Name | Galvanized Steel Beams for Building Construction | Hot-dip or electro-galvanized structural steel beams used in commercial, industrial, and residential construction |
| Material Grade | Q235B / Q355B / S235JR / S355JR / A36 / A572 Gr.50 | International equivalents: Q235B ≈ S235JR ≈ A36; Q355B ≈ S355JR ≈ A572 Gr.50 |
| Standard Compliance | ASTM A6/A6M, EN 10025-2, GB/T 11263, JIS G3192 | Covers hot-rolled H-beams, I-beams, and wide flange sections for structural applications |
| Chemical Composition | C ≤ 0.22%, Mn ≤ 1.60%, Si ≤ 0.55%, P ≤ 0.035%, S ≤ 0.035% | Low-carbon structural steel chemistry ensuring good weldability and galvanizing compatibility |
| Tensile Strength | 400–550 MPa (Q235B); 470–630 MPa (Q355B) | Per GB/T 700 and GB/T 1591; ASTM A36: 400–550 MPa; A572 Gr.50: 450 MPa min |
| Yield Strength | ≥ 235 MPa (Q235B); ≥ 355 MPa (Q355B) | Minimum yield strength at thickness ≤ 16 mm; decreases with increasing thickness per standard |
| Elongation | ≥ 26% (Q235B); ≥ 20% (Q355B) | Longitudinal elongation at fracture per GB/T 228.1; ensures ductility under structural loads |
| Beam Section Types | H-Beam, I-Beam (IPE/HEA/HEB), Wide Flange (W-Section) | Available in standard and wide flange profiles; web height 100–900 mm, flange width 50–400 mm |
| Length Range | 6 m – 12 m (standard); up to 18 m (custom) | Standard mill lengths; custom cutting available; tolerance per EN 10279 or GB/T 11263 |
| Galvanizing Method | Hot-Dip Galvanizing (HDG); Electro-Galvanizing (optional) | HDG per ASTM A123 / EN ISO 1461; zinc coating thickness ≥ 45–85 μm depending on steel thickness |
| Zinc Coating Weight | ≥ 305 g/m² (ASTM A123); ≥ 350 g/m² (EN ISO 1461 for t > 6 mm) | Provides corrosion protection life of 20–70 years depending on environment (ISO 9223 category) |
| Surface Finish | Spangled / Smooth HDG finish; uniform zinc layer, no bare spots | Visual inspection per ASTM A123 Sec. 6; optional chromate passivation or paint-ready surface |
| Application | Structural frames, floor beams, roof trusses, bridges, industrial buildings, warehouses | Suitable for corrosive environments including coastal, industrial, and high-humidity zones |
| Certification | ISO 9001:2015, CE Marking (EN 1090-1), Mill Test Certificate (EN 10204 3.1/3.2) | Third-party inspection available; SGS, BV, TÜV reports upon request |
| Packaging | Steel-banded bundles (2–5 MT per bundle); end caps and dunnage protection | Seaworthy export packaging; fumigation-free wooden dunnage; suitable for container or bulk vessel |
| MOQ | 25 MT per size/grade | Mixed container orders accepted; full container load (FCL) preferred for cost efficiency |
Initial coating thickness variance — issue resolved professionally
Ordered 30 tonnes of galvanized H-pile sections (150 mm x 150 mm, AS/NZS 4680 equivalent) for a residential foundation project in Brisbane. Upon inspection, roughly 15% of sections measured 72–74 µm coating — below our 80 µm project minimum. Raised the issue with the support team; they arranged re-galvanizing of the affected sections and reshipped within 10 days at no extra cost. Final material passed our QA checks. The responsive handling of the complaint was reassuring — will consider reordering once lead time and first-pass quality consistency improve.
Ordered 30 tonnes of galvanized H-pile sections (150 mm x 150 mm, AS/NZS 4680 equivalent) for a residential foundation project in Brisbane. Upon inspection, roughly 15% of sections measured 72–74 µm coating — below our 80 µm project minimum. Raised the issue with the support team; they arranged re-galvanizing of the affected sections and reshipped within 10 days at no extra cost. Final material passed our QA checks. The responsive handling of the complaint was reassuring — will consider reordering once lead time and first-pass quality consistency improve.
