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| Property | Parameter | Description |
|---|---|---|
| Product Name | Steel Pipe for Building Structural Support | Hollow structural steel pipe used in columns, frames, trusses, and load-bearing systems |
| Material Grade | ASTM A500 Gr.B/C; EN 10210 S355J2H; GB/T 6728 Q355B; JIS G3466 STKR490 | High-strength low-alloy structural steel grades with international equivalents |
| Standard Compliance | ASTM A500 / A53; EN 10210 / EN 10219; GB/T 6728 / GB/T 8162; JIS G3466 | Covers hot-formed and cold-formed hollow structural sections for construction |
| Chemical Composition | C ≤ 0.23%, Mn ≤ 1.60%, P ≤ 0.035%, S ≤ 0.035%, Si ≤ 0.40%, Cu ≤ 0.35% | Composition per ASTM A500 Gr.B; ensures weldability and structural integrity |
| Tensile Strength | ≥ 483 MPa (70,000 psi) — ASTM A500 Gr.B; ≥ 470 MPa — EN S355J2H | Minimum ultimate tensile strength ensuring load-bearing capacity under structural loads |
| Yield Strength | ≥ 317 MPa (46,000 psi) — ASTM A500 Gr.B; ≥ 355 MPa — EN S355J2H | Minimum yield point for structural design calculations per respective standards |
| Elongation | ≥ 23% (in 2 in / 50 mm gauge length) | Ensures adequate ductility for seismic and dynamic structural applications |
| Pipe Type | Round, Square, Rectangular HSS (Hollow Structural Section) | Available in CHS, SHS, and RHS profiles to suit various structural configurations |
| Dimensional Range | OD: 21.3–914 mm; Wall Thickness: 1.6–50 mm; Length: 6 m / 12 m or custom | Wide size range covering light framing to heavy structural columns and beams |
| Manufacturing Process | ERW (Electric Resistance Welded), SAW (Submerged Arc Welded), Seamless | Seamless preferred for high-stress columns; ERW suitable for general structural use |
| Surface Finish | Black (mill finish), Hot-Dip Galvanized (≥ 85 μm), Epoxy Coated, Primer Painted | Galvanized finish per ASTM A123 for corrosion protection in exposed structures |
| Heat Treatment | Normalized or As-Rolled; stress-relieved available on request | Normalizing improves toughness and uniformity for critical structural members |
| Application | Building columns, space frames, trusses, scaffolding, curtain wall supports, bridges | Widely used in commercial, industrial, and residential structural steel construction |
| Certification | ISO 9001:2015, CE Marking (EN 1090), Mill Test Certificate (EN 10204 3.1/3.2) | Third-party inspection available; MTR traceable to heat and lot number |
| Packaging | Bundled in hexagonal or square bundles; steel-strapped; end caps fitted | Bundle weight typically 2–5 MT; custom packaging for container or bulk shipment |
| MOQ | 25 MT per size/grade (mixed sizes negotiable for full container loads) | Trial orders accepted; FOB, CFR, CIF terms available; lead time 15–30 days |
Initial shipment had a surface marking issue — resolved quickly and professionally
Ordered 90 tons of 323.9mm OD x 9.5mm wall seamless pipe to ASTM A53 Grade B for foundation pile casings in Houston. When the shipment arrived, heat number markings on roughly 15% of the lengths were partially illegible due to what appeared to be a paint overspray issue during bundling. This created a traceability concern for our site inspector. I contacted the support team immediately — they responded within two hours, arranged a re-marking protocol with photographic documentation, and provided a supplementary MTC cross-reference table. Issue was resolved within 48 hours. Product mechanical properties were fully compliant. Communication during the resolution was professional and I would consider ordering again.
Ordered 90 tons of 323.9mm OD x 9.5mm wall seamless pipe to ASTM A53 Grade B for foundation pile casings in Houston. When the shipment arrived, heat number markings on roughly 15% of the lengths were partially illegible due to what appeared to be a paint overspray issue during bundling. This created a traceability concern for our site inspector. I contacted the support team immediately — they responded within two hours, arranged a re-marking protocol with photographic documentation, and provided a supplementary MTC cross-reference table. Issue was resolved within 48 hours. Product mechanical properties were fully compliant. Communication during the resolution was professional and I would consider ordering again.
