RHS Tubes

Description

1. Product Overview
RHS Tubes (Rectangular Hollow Sections) are high-strength, cold-formed or hot-rolled steel structural profiles engineered for load-bearing frameworks and mechanical applications. Primarily used in construction, infrastructure, and industrial fabrication, these tubes deliver an exceptional strength-to-weight ratio combined with superior dimensional accuracy for standardized assembly. Their strategic market importance lies in enabling capital-efficient, durable structures that reduce material waste and onsite labor costs—directly addressing the global push for leaner, higher-yield construction methods.

2. Key Specifications & Technical Characteristics

• Material Composition: S235JR, S355J2H, or ASTM A500 Grade B/C (low-carbon, high-tensile micro-alloyed steel)

• Purity / Grade: Commercial grade with full mill certificate (EN 10219 / ASTM A500); guaranteed zero internal slag or lamination defects

• Physical Characteristics:

  • Rectangular cross-section with radiused corners (r ≤ 2.5t)

  • Wall thickness: 1.5 mm – 12.0 mm

  • Outer dimensions: 20×10 mm up to 400×200 mm

  • Surface: Mill finish, pre-primed, or hot-dip galvanized (optional)

  • Linear density: 1.5 – 85 kg/m

• Packaging Options: Hexagonal bundles (500–3000 kg), steel strapped with edge protectors; seaworthy export packaging (VCI film + plywood pallets)

• Shelf Life: Indefinite when stored indoors with ≤60% RH; outdoor storage up to 6 months with anti-rust oil coating

3. Core Industrial Applications

• Primary Industries: Heavy construction, bridge building, agricultural equipment, material handling systems, solar tracker frames, and modular building manufacturing

• Specific Use Cases:

  • Structural columns and beams in pre-engineered buildings

  • Chassis for conveyor systems and overhead cranes

  • Roll cages and safety barriers for mining vehicles

• Performance Advantage vs. Alternatives: Compared to open sections (I-beams, C-channels), RHS offers higher torsional rigidity (+40% under equivalent mass) and a clean, weld-ready exterior. Unlike round tubes, the flat faces enable boltless bracket attachment, reducing fabrication time by 25–30%. Cost efficiency is achieved via lower paint consumption (smooth, continuous surfaces) and simplified logistics (nestable stacking).

• Durability Bonus: Uniform wall thickness eliminates hidden corrosion traps, extending service life in humid environments by 2x relative to lap-welded sections.

4. Competitive Advantages

• Quality Consistency: 100% ultrasonic weld inspection and ±0.5 mm dimensional tolerance guarantee; each batch traceable to heat number.

• Supply Reliability: 8 weeks lead time from order to FOB port with buffer inventory in regional hubs (Rotterdam, Houston, Shanghai). 99.2% on-time delivery track record over 24 months.

• Logistics Capability: Direct mill-to-port logistics with pre-shipment third-party inspection (SGS or BV) at no extra cost.

• Price Competitiveness: Tier-1 mill volume discounts passed through – pricing at 5–8% below regional distributor averages for ≥100 MT orders.

• Sustainability: 92% recycled content in raw material; fully carbon footprint-verified per ISO 14064. Galvanizing partners use zero-liquid-discharge systems.

• Technical Support: Full CAD library (STEP, DXF) for all profiles; welding procedure specifications (WPS) provided free of charge.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20MT (mixed dimensions allowed within same grade)

• Loading Capacity: 20–24 MT per standard 20ft container (depending on wall thickness); 24 MT per 20ft flat rack or 20ft open-top container