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| Property | Parameter | Description |
|---|---|---|
| Product Name | U Channel Steel (UPN / UPE) | Hot rolled structural U-shaped channel section for construction and industrial use |
| Material Grade | Q235B / SS400 / S235JR / A36 | Equivalent grades: EN S235JR, JIS SS400, GB Q235B, ASTM A36 |
| Standard Compliance | ASTM A36, EN 10279, JIS G3101, GB/T 706 | Manufactured per international structural steel channel standards |
| Carbon (C) | ≤ 0.20% | Per ASTM A36 / GB Q235B specification |
| Manganese (Mn) | 0.60 - 1.20% | Enhances strength and toughness of the channel |
| Silicon (Si) | ≤ 0.35% | Deoxidizer improving steel quality |
| Phosphorus (P) | ≤ 0.040% | Controlled to ensure weldability and ductility |
| Sulfur (S) | ≤ 0.050% | Minimized to prevent hot shortness |
| Tensile Strength | 400 - 510 MPa | Per ASTM A36: 400-550 MPa; EN S235JR: 360-510 MPa |
| Yield Strength | ≥ 235 MPa | Minimum yield point per S235JR / Q235B standard |
| Elongation | ≥ 20% | Measured on standard gauge length specimen (A5) |
| Size Range | Height: 50 - 400 mm; Flange: 25 - 110 mm; Web: 4.0 - 14.0 mm | Standard lengths: 6 m, 9 m, 12 m or cut-to-length available |
| Surface Finish | Hot rolled black / Galvanized / Painted | Optional hot-dip galvanizing per ASTM A123 or primer coating |
| Application | Structural framing, curtain walls, machinery support, bridges | Widely used in building construction, vehicle frames, and industrial platforms |
| Certification | ISO 9001, EN 10204 3.1 MTC, SGS, BV | Mill test certificate provided with each shipment |
| Packaging | Bundled with steel strips, waterproof paper wrapped | Bundles tagged with heat number, grade, and dimensions for traceability |
| MOQ | 5 Metric Tons | Smaller quantities available upon request with adjusted lead time |
Initial Surface Issue Resolved Professionally
Ordered 30 MT of black finish U channels (150mm x 75mm, 6mm thickness, A36 grade) for a mezzanine floor project. When the shipment arrived, approximately 8% of pieces had moderate surface rust beyond normal mill scale, likely from moisture exposure during transit. Reported the issue and the supplier responded within 24 hours — they provided a fair credit note and shipped replacement pieces at no additional cost within three weeks. The replacement batch was properly oiled and wrapped. The product itself met all dimensional and mechanical specs. Issue handling was professional, so I'd cautiously reorder with improved packaging requested upfront.
Ordered 30 MT of black finish U channels (150mm x 75mm, 6mm thickness, A36 grade) for a mezzanine floor project. When the shipment arrived, approximately 8% of pieces had moderate surface rust beyond normal mill scale, likely from moisture exposure during transit. Reported the issue and the supplier responded within 24 hours — they provided a fair credit note and shipped replacement pieces at no additional cost within three weeks. The replacement batch was properly oiled and wrapped. The product itself met all dimensional and mechanical specs. Issue handling was professional, so I'd cautiously reorder with improved packaging requested upfront.
