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Technical Specifications
Product Overview
Mechanical/Structural Steel Square is manufactured from high-quality carbon steel designed for structural and mechanical applications. This hollow structural section (HSS) provides excellent strength-to-weight ratio and is ideal for construction, fabrication, and engineering projects.
Key Features:
- High strength and durability for structural applications
- Excellent weldability and machinability
- Cost-effective solution for construction projects
- Uniform wall thickness and dimensional accuracy
- Good corrosion resistance with proper coating
Manufacturing Process: Cold-formed or hot-rolled from quality carbon steel strip, welded using high-frequency electric resistance welding (ERW) or submerged arc welding (SAW) processes.
Applications: Building construction, structural frameworks, mechanical components, architectural applications, agricultural equipment, transportation infrastructure, and general fabrication projects requiring high strength and dimensional stability.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A36 Requirement |
|---|---|---|---|---|
| Carbon (C) | - | 0.26 | 0.18 | ≤ 0.26 |
| Manganese (Mn) | 0.80 | 1.20 | 0.95 | 0.80-1.20 |
| Silicon (Si) | 0.15 | 0.40 | 0.25 | 0.15-0.40 |
| Phosphorus (P) | - | 0.040 | 0.025 | ≤ 0.040 |
| Sulfur (S) | - | 0.050 | 0.030 | ≤ 0.050 |
| Copper (Cu) | - | 0.20 | 0.12 | ≤ 0.20 |
| Chromium (Cr) | - | 0.15 | 0.08 | ≤ 0.15 |
| Nickel (Ni) | - | 0.15 | 0.08 | ≤ 0.15 |
| Iron (Fe) | Balance | Balance | 98.2 | Balance |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 400-550 MPa | 485 MPa | ASTM A370 | Room Temp |
| Yield Strength | 250 MPa min | 275 MPa | ASTM A370 | Room Temp |
| Elongation | 20% min | 25% | ASTM A370 | Room Temp |
| Hardness (Brinell) | - | 145 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 | 1425-1540 | °C | - | DSC Analysis |
| Thermal Conductivity | 50.2 | W/m·K | 100°C | ASTM E1461 |
| Specific Heat | 486 | 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 | - | Magnetic |
📏 Product Specifications
| Specification | Available Range | Standard Length | Custom Available | Tolerance |
|---|---|---|---|---|
| Square Size | 10mm - 200mm | Various | Yes | ±0.5mm |
| Wall Thickness | 1.5mm - 16mm | Various | Yes | ±10% |
| Length | 3m - 12m | 6m | Yes | +50mm/-0mm |
| Surface Finish | Hot Rolled, Cold Formed | Hot Rolled | Yes | Mill finish |
| Manufacturing Type | Seamless, Welded | Welded | Both | ASTM standard |
| End Connection | Plain, Beveled, Threaded | Plain | Yes | ASTM A500 |
| Standards Compliance | ASTM A500, A36, A572 | A500 | Multiple | Full compliance |
| Grade Options | Grade A, B, C | Grade B | Yes | ASTM A500 |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Crates, Containers | Bundles | Custom | Export standard |
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Our Advantages in Processing เหล็กกล้าสี่เหลี่ยมผืนผ้า/โครงสร้าง
Precision Structural Forming
Advanced manufacturing techniques ensure perfectly square cross-sections with tight dimensional tolerances. The mechanical forming process creates consistent wall thickness and sharp corners, essential for structural integrity and load-bearing applications.
Uniform Steel Distribution
The mechanical manufacturing process guarantees even distribution of steel throughout the tube walls, eliminating weak points and stress concentrations. This results in superior structural performance and reliable load-bearing capacity.
Enhanced Weldability Control
The mechanical production method incorporates precise control over steel composition and surface finish, ensuring optimal weldability. This facilitates seamless integration in structural assemblies while maintaining material strength at connection points.
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