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Technical Specifications
Product Overview
Mechanical/Structural Steel Rectangular Tube is manufactured from high-quality carbon steel, designed for structural and mechanical applications requiring excellent strength-to-weight ratio and dimensional stability. These hollow structural sections (HSS) provide superior load-bearing capacity and are ideal for construction and fabrication projects.
Key Features:
- High strength-to-weight ratio for efficient structural design
- Excellent weldability and machinability
- Uniform wall thickness and precise dimensions
- Cost-effective solution for structural applications
- Available in various grades and finishes
Manufacturing Process: Electric Resistance Welded (ERW) using advanced forming and welding technology, ensuring consistent quality and dimensional accuracy with smooth interior and exterior surfaces.
Applications: Building construction, bridge construction, machinery frames, automotive chassis, furniture manufacturing, architectural applications, support structures, and general fabrication projects requiring structural integrity.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A500 Requirement |
|---|---|---|---|---|
| Carbon (C) | - | 0.26 | 0.18 | ≤ 0.26 |
| Manganese (Mn) | - | 1.35 | 0.90 | ≤ 1.35 |
| Phosphorus (P) | - | 0.035 | 0.020 | ≤ 0.035 |
| Sulfur (S) | - | 0.035 | 0.018 | ≤ 0.035 |
| Silicon (Si) | - | 0.40 | 0.25 | ≤ 0.40 |
| Copper (Cu) | 0.20 | - | 0.25 | ?Y 0.20 (when specified) |
| Chromium (Cr) | - | 0.15 | 0.08 | ≤ 0.15 |
| Nickel (Ni) | - | 0.15 | 0.08 | ≤ 0.15 |
| Iron (Fe) | Balance | Balance | 98.3 | Balance |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 400 MPa min | 450 MPa | ASTM A370 | Room Temp |
| Yield Strength | 315 MPa min | 350 MPa | ASTM A370 | Room Temp |
| Elongation | 23% min | 28% | ASTM A370 | Room Temp |
| Hardness (Brinell) | - | 140 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | - | 78 HRB | ASTM E18 | Room Temp |
| Modulus of Elasticity | - | 200 GPa | ASTM E111 | Room Temp |
| Impact Energy (Charpy V) | - | 80+ J | ASTM E23 | Room Temp |
🔬 Physical Properties
| Property | Value | Unit | Temperature | Test Standard |
|---|---|---|---|---|
| Density | 7.85 | g/cm3 | 20°C | ASTM B311 |
| Melting Point | 1510-1540 | °C | - | DSC Analysis |
| Thermal Conductivity | 50.2 | W/m·K | 100°C | ASTM E1461 |
| Specific Heat | 460 | J/kg·K | 0-100°C | ASTM C351 |
| Linear Expansion | 11.7 | μm/m·K | 0-100°C | ASTM E228 |
| Electrical Resistivity | 170 | n|°¤m | 20°C | ASTM B193 |
| Magnetic Permeability | High | μ/μ₀ | Room Temp | ASTM A342 |
| Curie Temperature | 770 | °C | - | Ferromagnetic |
📏 Product Specifications
| Specification | Available Range | Standard Size | Custom Available | Tolerance |
|---|---|---|---|---|
| Width | 20mm - 400mm | Various | Yes | ±1.0mm |
| Height | 20mm - 300mm | Various | Yes | ±1.0mm |
| Wall Thickness | 1.5mm - 16mm | Various | Yes | ±10% |
| Length | 3m - 12m | 6m | Yes | +50mm/-0mm |
| Corner Radius | 1.5t - 3.0t | 2.0t | Yes | ±0.5mm |
| Surface Finish | Black, Galvanized, Painted | Black | Yes | SSPC standards |
| Forming Method | ERW, Seamless | ERW | Both | ASTM A500 |
| End Condition | Plain, Beveled, Machined | Plain | Yes | ±1.0mm |
| Standards Compliance | ASTM A500, A501, A618 | A500 | Multiple | Full compliance |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
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Our Advantages in Processing ท่อเหล็กรีดสี่เหลี่ยมเชิงกล/โครงสร้าง
Precision Mechanical Forming
Advanced mechanical forming techniques ensure exact dimensional accuracy and consistent wall thickness throughout the rectangular tube structure, resulting in superior load-bearing capacity and structural integrity for demanding applications.
Structural Steel Processing
Specialized steel processing methods create optimal grain structure and mechanical properties, delivering enhanced tensile strength and durability while maintaining excellent weldability and fabrication characteristics.
Uniform Shape Control
State-of-the-art rolling and shaping processes guarantee precise corner radii and flat surfaces, ensuring perfect rectangular geometry and dimensional stability required for structural applications and precise fitting.
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