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| Property | Parameter | Description |
|---|---|---|
| Product Name | Structural Steel Beams | Hot-rolled I-beams, H-beams, W-beams and wide flange sections for structural applications |
| Material Grade | A36 / A992 / S275JR / S355JR / Q235B / Q345B | ASTM A36 ≡ S235JR; ASTM A992 ≡ S355J2; Q345B ≡ S355JR (international equivalents) |
| Standard Compliance | ASTM A6 / EN 10025 / JIS G3192 / GB/T 706 | Meets dimensional and mechanical tolerances per respective international rolling standards |
| Carbon Content (C) | ≤ 0.26% (A36) / ≤ 0.23% (S355JR) | Low carbon content ensures good weldability and formability |
| Manganese (Mn) | 0.80–1.20% (A992) / ≤ 1.60% (S355JR) | Enhances tensile strength and hardenability of the steel matrix |
| Phosphorus (P) / Sulfur (S) | P ≤ 0.035% / S ≤ 0.035% | Controlled impurity levels per EN 10025-2 and ASTM A36 requirements |
| Silicon (Si) | ≤ 0.40% (A36) / ≤ 0.55% (S355JR) | Deoxidizing element; improves strength without reducing ductility |
| Tensile Strength | 400–550 MPa (S275JR) / 470–630 MPa (S355JR) / 400–550 MPa (A36) | Per EN 10025-2 Table 7 and ASTM A36 Table 1; values vary by flange thickness |
| Yield Strength | ≥ 235 MPa (S235JR) / ≥ 275 MPa (S275JR) / ≥ 345 MPa (S355JR / Q345B) | Minimum yield strength at thickness ≤ 16 mm; decreases with increasing thickness |
| Elongation | ≥ 20% (A36) / ≥ 22% (S275JR) / ≥ 20% (S355JR) | Measured on gauge length L0 = 5.65√S0; ensures adequate ductility for seismic zones |
| Section Dimensions | Depth: 100–900 mm; Flange Width: 50–400 mm; Web Thickness: 4–30 mm | Available in IPE, HEA, HEB, HEM (European) and W4×13 to W36×300 (ASTM) series |
| Length | 6 m / 9 m / 12 m (standard) / up to 18 m (custom) | Mill lengths per order; cutting tolerance ±5 mm per EN 10279 |
| Surface Finish | Hot-rolled mill scale (as-rolled) / Shot-blasted Sa2.5 / Primer coated | Mill scale per ISO 8501-1; shot-blasted and primed options available on request |
| Application | Building frames, bridges, industrial platforms, crane runways, offshore structures | Suitable for primary and secondary structural members in civil and industrial construction |
| Certification | ISO 9001:2015 / CE Marking (EN 1090-2) / Mill Test Certificate EN 10204 3.1 | Third-party inspection by SGS, BV or TÜV available; full traceability per heat number |
| Packaging | Steel-banded bundles (2–5 MT per bundle); ends capped; waterproof paper wrapped | Bundled per ASTM A6 or EN 10025 packing guidelines; suitable for sea and land transport |
| MOQ | 25 MT per grade/section size | Mixed section sizes accepted within same grade; spot stock available for standard sections |
Initial Section Mix-Up Resolved — Supplier Handled It Properly
Our order of 12 metric tons of W8x31 sections to ASTM A992 arrived with approximately 1.5 metric tons incorrectly labelled as W8x28 — a flange thickness discrepancy our QC team caught on receipt. I want to be fair: the supplier acknowledged the error within 24 hours, issued a corrected replacement shipment at no additional cost, and provided a revised MTR package. The replacement material was correct and the mechanical properties checked out at 349 MPa yield. It delayed our fab schedule by nine days, which was disruptive. The resolution was handled professionally, so I'd consider ordering again, but the initial error shouldn't have happened.
Our order of 12 metric tons of W8x31 sections to ASTM A992 arrived with approximately 1.5 metric tons incorrectly labelled as W8x28 — a flange thickness discrepancy our QC team caught on receipt. I want to be fair: the supplier acknowledged the error within 24 hours, issued a corrected replacement shipment at no additional cost, and provided a revised MTR package. The replacement material was correct and the mechanical properties checked out at 349 MPa yield. It delayed our fab schedule by nine days, which was disruptive. The resolution was handled professionally, so I'd consider ordering again, but the initial error shouldn't have happened.
