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| Property | Parameter | Description |
|---|---|---|
| Product Name | Structural Steel for Commercial Buildings | Hot-rolled and fabricated steel sections used in commercial construction frameworks |
| Material Grade | A36 / A992 / S275JR / S355JR / Q345B | ASTM A36 (equiv. S235JR), ASTM A992 (W-shapes), EN 10025 S275/S355, GB/T 1591 Q345B |
| Standard Compliance | ASTM A36, ASTM A992, EN 10025-2, GB/T 1591, JIS G3101 SS400 | Meets international structural steel standards for load-bearing commercial applications |
| Chemical Composition – C | ≤ 0.26% (A36) / ≤ 0.23% (S355JR) | Carbon content controls weldability and hardness |
| Chemical Composition – Mn | 0.80–1.20% (A36) / ≤ 1.60% (S355JR) | Manganese enhances tensile strength and toughness |
| Chemical Composition – P / S | P ≤ 0.04% / S ≤ 0.05% | Low phosphorus and sulfur improve ductility and impact resistance |
| Chemical Composition – Si | ≤ 0.40% (S355JR) / ≤ 0.40% (Q345B) | Silicon acts as deoxidizer and strengthening element |
| Tensile Strength | 400–550 MPa (A36: 400–550 MPa; S355JR: 470–630 MPa) | Per ASTM A36 and EN 10025-2; suitable for high-load commercial structural frames |
| Yield Strength | ≥ 250 MPa (A36) / ≥ 355 MPa (S355JR) / ≥ 345 MPa (Q345B) | Minimum yield strength ensuring structural integrity under design loads |
| Elongation | ≥ 20% (A36, 200 mm gauge) / ≥ 22% (S355JR) | High elongation ensures ductile behavior under seismic and dynamic loads |
| Available Sections | H-beam, I-beam, Wide Flange (W-shape), Angle, Channel, Hollow Section (RHS/SHS/CHS) | Full range of structural profiles for columns, beams, bracing, and trusses |
| Dimension Range | Thickness: 6–100 mm; Width: 100–600 mm; Length: 6–18 m (customizable) | Standard mill lengths; custom cutting available per project specification |
| Surface Finish | Hot-rolled (black), Shot-blasted Sa2.5, Primer-coated, Galvanized (optional) | Surface treatment selected based on corrosion exposure and coating requirements |
| Application | Office buildings, shopping malls, warehouses, hotels, multi-story frames, industrial facilities | Primary load-bearing structure, secondary framing, mezzanine floors, curtain wall supports |
| Certification | ISO 9001:2015, CE Marking (EN 1090), Mill Test Certificate (EN 10204 3.1/3.2), BV/SGS/TÜV | Third-party inspection and material traceability documentation available |
| Packaging | Bundle with steel strapping; ends capped; seaworthy packing for export | Standard bundle weight 2–5 MT; fumigation certificate available for wooden dunnage |
| MOQ | 25 MT per grade/section | Mixed container orders accepted; FOB, CFR, CIF terms available |
Initial order had a grade documentation issue — resolved satisfactorily
We ordered 60 tons of structural steel plates specified to ASTM A572 Grade 50 for a commercial building project in Brisbane. When the MTRs arrived, two plates from one heat were certified to Grade 42 rather than Grade 50 as ordered. This created a compliance issue we had to flag immediately. To their credit, the supplier acknowledged the error quickly, provided replacement material certified to the correct grade within 12 days, and covered the additional freight cost. Final material met spec and the project proceeded without further issues. Service recovery was handled professionally. Rating reflects the initial error, not the resolution.
We ordered 60 tons of structural steel plates specified to ASTM A572 Grade 50 for a commercial building project in Brisbane. When the MTRs arrived, two plates from one heat were certified to Grade 42 rather than Grade 50 as ordered. This created a compliance issue we had to flag immediately. To their credit, the supplier acknowledged the error quickly, provided replacement material certified to the correct grade within 12 days, and covered the additional freight cost. Final material met spec and the project proceeded without further issues. Service recovery was handled professionally. Rating reflects the initial error, not the resolution.
