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| Property | Parameter | Description |
|---|---|---|
| Product Name | Steel Channel Profile | Structural C/U-shaped steel channel for construction and industrial use |
| Material Grade | Q235B / Q355B / S235JR / S275JR / S355JR / A36 / A572 Gr.50 | Q235B ≈ S235JR ≈ A36; Q355B ≈ S355JR ≈ A572 Gr.50; international equivalent grades available |
| Standard Compliance | GB/T 706, EN 10025, ASTM A36 / A572, JIS G3192 | Manufactured and tested in accordance with Chinese, European, American and Japanese structural steel standards |
| Chemical Composition – C | ≤ 0.20% (Q235B) / ≤ 0.24% (Q355B) | Carbon content controls hardness and weldability |
| Chemical Composition – Mn | 0.30–0.70% (Q235B) / 1.00–1.60% (Q355B) | Manganese enhances strength and toughness |
| Chemical Composition – P / S | P ≤ 0.045% / S ≤ 0.045% | Low phosphorus and sulfur ensure improved ductility and impact resistance |
| Chemical Composition – Si | ≤ 0.35% | Silicon acts as a deoxidizer and improves strength |
| Tensile Strength | 370–500 MPa (Q235B) / 470–630 MPa (Q355B) | Per GB/T 706 and EN 10025-2; higher grades available upon request |
| Yield Strength | ≥ 235 MPa (Q235B) / ≥ 355 MPa (Q355B) | Minimum yield strength for thickness ≤ 16 mm; decreases with increasing thickness |
| Elongation | ≥ 26% (Q235B) / ≥ 22% (Q355B) | Measured on gauge length L₀ = 5.65√S₀; ensures adequate ductility for structural applications |
| Section Size Range | Web Height: 50–400 mm; Flange Width: 32–102 mm; Web Thickness: 4.5–13 mm | Standard channel sizes per GB/T 706 (5# – 40#); custom profiles available per EN / ASTM dimensions |
| Length | 6 m / 9 m / 12 m (standard); custom lengths available | Fixed or random lengths supplied; tolerance per applicable standard |
| Surface Finish | Hot-rolled (black); Galvanized; Shot-blasted; Painted | Hot-rolled mill scale finish standard; hot-dip galvanizing (≥ 85 µm) and other coatings available |
| Application | Building frames, bridges, machinery bases, conveyor systems, shelving, vehicle chassis | Widely used in structural steel fabrication, civil engineering, and industrial equipment manufacturing |
| Certification | ISO 9001:2015, CE Marking (EN 10025), Mill Test Certificate (EN 10204 3.1 / 3.2) | Third-party inspection by SGS, BV, TÜV available upon request |
| Packaging | Bundle with steel strip (2–5 MT per bundle); seaworthy wooden packing for export | Standard export packaging with moisture-proof protection; labeling per customer requirement |
| MOQ | 25 MT per size / grade | Mixed container orders accepted; spot stock available for standard sizes |
Initial shipment had a packing issue — resolved promptly, product quality was fine
Ordered 35 tonnes of UPN 160 in S355JR for a structural steel subcontract in Michigan. The channel profiles themselves met spec — MTC confirmed yield strength at 361 MPa, EN 10025-2 compliant, and our shop found no dimensional issues during layout. However, roughly 8% of the bundle had surface rust beyond what EN 10163-3 Class C should permit, apparently due to inadequate waterproofing during ocean transit. I raised this immediately and the supplier responded within 4 hours, issued a partial credit for remediation costs, and confirmed updated packing instructions for future orders. Quality of the steel itself was not in question — just the transit packaging. Cautiously optimistic for next order.
Ordered 35 tonnes of UPN 160 in S355JR for a structural steel subcontract in Michigan. The channel profiles themselves met spec — MTC confirmed yield strength at 361 MPa, EN 10025-2 compliant, and our shop found no dimensional issues during layout. However, roughly 8% of the bundle had surface rust beyond what EN 10163-3 Class C should permit, apparently due to inadequate waterproofing during ocean transit. I raised this immediately and the supplier responded within 4 hours, issued a partial credit for remediation costs, and confirmed updated packing instructions for future orders. Quality of the steel itself was not in question — just the transit packaging. Cautiously optimistic for next order.
