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| Property | Parameter | Description |
|---|---|---|
| Product Name | Steel Plate Column | Structural column fabricated from welded or rolled steel plates, used in heavy-load bearing frameworks |
| Material Grade | Q235B / Q345B / A36 / A572 Gr.50 / S235JR / S355JR | International equivalents: Q345B ≈ S355JR (EN) ≈ A572 Gr.50 (ASTM); Q235B ≈ S235JR ≈ A36 |
| Standard Compliance | ASTM A6 / A36 / A572; EN 10025-2; GB/T 700; GB/T 1591; JIS G3101 | Fabrication per AWS D1.1 (welding), AISC 360, or GB 50017 structural steel design code |
| Chemical Composition – C | ≤ 0.20% (Q345B) / ≤ 0.26% (A36) | Low carbon content ensures good weldability and toughness for column fabrication |
| Chemical Composition – Mn / Si / P / S | Mn: 1.00–1.60%; Si: ≤ 0.55%; P: ≤ 0.035%; S: ≤ 0.035% | Controlled alloying elements per GB/T 1591 and ASTM A572; improves strength and ductility |
| Tensile Strength | 400–550 MPa (Q345B); 400–550 MPa (S355JR); ≥ 400 MPa (A36) | Per GB/T 1591, EN 10025-2, and ASTM A36/A572 respectively |
| Yield Strength | ≥ 345 MPa (Q345B / S355JR); ≥ 250 MPa (A36); ≥ 345 MPa (A572 Gr.50) | Minimum yield strength for plate thickness ≤ 16 mm; decreases with increasing thickness per standard |
| Elongation | ≥ 20% (Q345B); ≥ 22% (A36); ≥ 21% (S355JR) | Measured on gauge length L0 = 5.65√S0; ensures adequate ductility under seismic and dynamic loads |
| Plate Thickness | 6 mm – 100 mm | Web plate and flange plate thickness selected based on load requirements and slenderness ratio |
| Column Cross-Section Dimensions | Height (H): 200–1200 mm; Width (B): 150–600 mm | Box section or H-section welded plate column; custom dimensions available per structural design |
| Length | 3,000 mm – 18,000 mm (standard); custom lengths available | Single-piece or spliced column lengths per project specification and transport limitations |
| Surface Finish | Mill finish / Shot blasted Sa 2.5 / Primer coated / Hot-dip galvanized | Surface treatment per ISO 8501-1; anti-corrosion coating per client specification or project standard |
| Application | Industrial plants, high-rise buildings, bridges, heavy machinery frames, offshore structures | Suitable for primary load-bearing columns in steel structure systems requiring high axial and bending capacity |
| Certification | ISO 9001:2015; CE Marking (EN 1090); Mill Test Certificate (MTC) per EN 10204 3.1 / 3.2 | Third-party inspection available: SGS, BV, TÜV; material traceability documentation provided |
| Packaging | Bundle with steel strapping; end caps for flange protection; rust-preventive oil applied if required | Seaworthy packaging available for export; loading per ISPM 15 for wooden dunnage |
| MOQ | 5 metric tons (standard grade); 1 piece (custom fabricated) | OEM fabrication accepted; lead time 15–30 days depending on specification and quantity |
Quality was fine — packaging damage on arrival, but supplier resolved it
We ordered 30 ASTM A36 H-section plate columns, 500mm deep with 250mm flanges and 12mm web plates, for an industrial shed project. The fabrication quality itself was acceptable — weld inspection per AWS D1.1 was satisfactory and dimensional tolerances were within AISC standards. However, three columns arrived with dented epoxy primer coating due to inadequate transport bracing, which was a concern for our corrosion protection requirements. After raising the issue with photos, the supplier arranged touch-up coating materials and compensation credit within one week. Issue resolved, but packaging for long sections needs improvement.
We ordered 30 ASTM A36 H-section plate columns, 500mm deep with 250mm flanges and 12mm web plates, for an industrial shed project. The fabrication quality itself was acceptable — weld inspection per AWS D1.1 was satisfactory and dimensional tolerances were within AISC standards. However, three columns arrived with dented epoxy primer coating due to inadequate transport bracing, which was a concern for our corrosion protection requirements. After raising the issue with photos, the supplier arranged touch-up coating materials and compensation credit within one week. Issue resolved, but packaging for long sections needs improvement.
