Structural Steel Tubes | High-Strength for Construction & Industrial Use
Structural Steel Tubes | Shapes for Construction, Machinery & Infrastructure
Shapes & Sizes：- Round: OD 10-325mm, Wall Thickness 1-40mm
– Square: Side 10-500mm, Wall Thickness 1-40mm
– Rectangular: 10×20-300×500mm, Wall Thickness 1-25mm
Materials： Carbon Steel: S235, S355, ASTM A500 Grade B
Alloy Steel: 4140, 4340
Structural Performance：Yield Strength: ≥235MPa (S235) / ≥345MPa (S355) / ≥650MPa (4140)
Tensile Strength: 360-1200MPa。 Straightness: ≤1mm/m
Certifications：ASTM A500 (North America), EN 10210/10219 (Europe), JIS G3444 (Japan), ISO 9001, CE
- Quality Assurance
Billet Control: Every batch of Structural Steel Tubes undergoes 100% ultrasonic flaw detection (for internal cracks) + dimensional inspection (shape/size tolerance) + load-bearing test (verify yield strength) — test reports provided with each shipment
Production Monitoring: During the cold-drawing process, laser diameter gauges are used for real-time monitoring of the outer diameter (tolerance strictly controlled within ±0.1mm), and the drawing force is simultaneously managed to avoid uneven wall thickness.
Finished Product Inspection: All finished products undergo 100% full-length ultrasonic flaw detection, inner wall roughness testing, and dimensional re-inspection. A material analysis report and a flaw detection report are accompanied with the goods.
- Procurement & After-Sales Service
Delivery: 10-15 days for regular specifications; 30-60 days for non-standard specifications (special wall thickness/material).
Minimum Order Quantity (MOQ): Approximately 5 metric tons for standard products. For special-sized or customized products, the MOQ may vary.
After-Sales Service: Before shipment, you may designate a third-party company to conduct on-site inspection at our factory. Regardless of whether pre-shipment inspection (PSI) is performed, you may engage a local third party for testing within 30 days of product arrival. If the issue is confirmed to be our responsibility, we will provide compensation and cover the inspection costs.
Contact: Phone 13181750210 | WhatsApp 13181750210
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