Flat Bars

Description

1. Product Overview
Flat Bars are precision-engineered, rectangular solid steel sections manufactured via hot-rolling or cold-drawing to strict dimensional tolerances. They serve as foundational input stock for structural fabrication, machinery manufacturing, and heavy infrastructure projects—ranging from building frames to equipment mounting plates. The key value proposition is an optimal strength-to-weight ratio combined with superior machinability and weldability, offering lower total cost of ownership versus custom-cut plate or complex extrusions. Strategically, flat bars are indispensable for global supply chains seeking standardized, just-in-time feedstock that minimizes scrap loss and accelerates production lead times.

2. Key Specifications & Technical Characteristics

• Material Composition: ASTM A36 / S235JR / SS400 (low carbon structural); optional C45 / 1045 (medium carbon); corrosion-resistant options (ASTM A588 – weathering steel)

• Purity / Grade: Commercial grade (standard), structural grade (S275/S355JR), and precision-ground grade (±0.1mm tolerance)

• Physical Characteristics:

  • Form: Rectangular solid profile, mill edge or sheared edge, black (uncoated) or pickled & oiled

  • Color: Mill scale dark grey (hot-rolled) / metallic silver (cold-drawn)

  • Thickness range: 3mm – 100mm

  • Width range: 12mm – 400mm

  • Standard length: 6m / 12m; custom cut-to-length available

• Density: 7.85 g/cm³ (standard carbon steel)

• Packaging Options: Steel strapped bundles (500–1500 kg per bundle), wooden edge protectors, export-wrapped with VCI paper and palletized for moisture resistance

• Shelf Life: Indefinite when stored indoors (relative humidity <60%, off-ground); recommended inventory rotation within 12 months to prevent surface oxidation

3. Core Industrial Applications

• Primary Industries: Heavy machinery & equipment manufacturing, construction & civil engineering, automotive frame production, shipbuilding, mining infrastructure, and agricultural implements.

• Specific Use Cases:

  • Base plates & support brackets: Direct replacement for cast or forged parts → Flat bars offer faster CNC milling and lower piece-part pricing at volume.

  • Staircase stringers & handrails: Superior bending consistency versus rebar or angle iron → reduces field welding time by 20–30%.

  • Truck trailer side rails & chassis cross-members: Uniform cross-section allows high-speed roll forming → cuts assembly labor by 15% compared to laser-cut plate.

  • Machine slide ways (precision-ground grade): Achieves ±0.05mm flatness without secondary grinding → eliminates one production step.

• Performance Advantage: Flat bars maintain consistent internal grain structure (no edge stress concentration), resulting in 18–25% higher fatigue resistance than sheared plate of equal dimensions, plus predictable thermal expansion during welding.

4. Competitive Advantages

• Quality consistency: ISO 9001:2025 certified mills; each batch tested for tensile strength, yield point, and elongation (3-point verification with mill test certificates enclosed).

• Supply reliability: Dedicated rolling schedule with 98.5% on-time-in-full (OTIF) delivery performance; safety stock held across three regional distribution hubs (Asia, EU, NA).

• Logistics capability: Containerization-ready (20′ / 40′ flat rack or standard dry van); barcode-tracked bundles with digital packing list upload to client ERP.

• Price competitiveness: Volume-based tier pricing (20MT+ spot discount; 200MT+ annual contract with price protection formula linked to HRC index).

• Sustainability: Flat bars contain up to 97% recycled steel content (EAF route) and are 100% recyclable; carbon footprint data available per batch upon request.

• Technical support: Free DXF file compatibility check for nesting; on-call metallurgical engineering for welding procedure specification (WPS) development.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20MT (can be split across up to 3 different dimensions per shipment)

• Loading capacity per container:

  • 20′ standard dry container: Max 22 MT (depending on bundle length ≤5.8m)

  • 40′ standard dry container: Max 26 MT (length ≤11.8m)

  • 40′ flat rack container: Max 28 MT (for lengths 12m–14m)

• Lead time: 15–25 days from order confirmation to port of loading (L/C or T/T advance)

• Incoterms supported: FOB, CIF, CFR, EXW (mill gate)