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Technical Specifications
Product Overview
Hot Rolled Steel I Beam is a structural steel member manufactured through hot rolling process, featuring an I-shaped cross-section that provides excellent strength-to-weight ratio for construction applications. These beams are primarily made from ASTM A992 grade steel, offering superior structural performance and weldability.
Key Features:
- High strength-to-weight ratio for efficient structural design
- Excellent load-bearing capacity in both compression and tension
- Superior weldability and machinability
- Cost-effective solution for structural applications
- Consistent dimensional accuracy and straightness
Manufacturing Process: Hot rolled through precision rolling mills at temperatures above 1000°C, ensuring optimal grain structure and mechanical properties. The I-beam profile is formed through specialized rolling stands that shape the flanges and web simultaneously.
Applications: Building construction, bridge construction, industrial structures, warehouse framing, high-rise buildings, infrastructure projects, and heavy machinery support structures.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A992 Requirement |
|---|---|---|---|---|
| Carbon (C) | - | 0.23 | 0.18 | ≤ 0.23 |
| Manganese (Mn) | 0.75 | 1.35 | 1.00 | 0.75-1.35 |
| Silicon (Si) | 0.15 | 0.40 | 0.25 | 0.15-0.40 |
| Phosphorus (P) | - | 0.04 | 0.025 | ≤ 0.04 |
| Sulfur (S) | - | 0.05 | 0.030 | ≤ 0.05 |
| Copper (Cu) | - | 0.35 | 0.20 | ≤ 0.35 |
| Nickel (Ni) | - | 0.30 | 0.15 | ≤ 0.30 |
| Chromium (Cr) | - | 0.30 | 0.15 | ≤ 0.30 |
| Iron (Fe) | Balance | Balance | 97.8 | Balance |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 450-620 MPa | 520 MPa | ASTM A370 | Room Temp |
| Yield Strength | 345 MPa min | 365 MPa | ASTM A370 | Room Temp |
| Elongation | 18% min | 22% | ASTM A370 | Room Temp |
| Hardness (Brinell) | - | 150-200 HB | ASTM E10 | Room Temp |
| Charpy V-Notch Impact | 27 J min at -18°C | 35 J | ASTM A370 | -18°C |
| Modulus of Elasticity | - | 200 GPa | ASTM E111 | Room Temp |
| Shear Modulus | - | 80 GPa | ASTM E143 | 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 | W/m·K | 100°C | ASTM E1461 |
| Specific Heat | 460 | J/kg·K | 0-100°C | ASTM C351 |
| Linear Expansion | 12.0 | μm/m·K | 0-100°C | ASTM E228 |
| Electrical Resistivity | 170 | n|°¤m | 20°C | ASTM B193 |
| Magnetic Permeability | High | μ/μ₀ | Room Temp | Ferromagnetic |
| Curie Temperature | 770 | °C | - | Magnetic transition |
📏 Product Specifications
| Specification | Available Range | Standard Size | Custom Available | Tolerance |
|---|---|---|---|---|
| Beam Depth (H) | 100mm - 900mm | Various | Yes | ±3mm |
| Flange Width (B) | 50mm - 300mm | Various | Yes | ±3mm |
| Web Thickness (tw) | 4mm - 20mm | Various | Yes | ±0.5mm |
| Flange Thickness (tf) | 5mm - 35mm | Various | Yes | ±0.5mm |
| Length | 6m - 18m | 12m | Yes | +50mm/-0mm |
| Surface Finish | Mill Scale, Shot Blast | Mill Scale | Yes | Standard |
| End Preparation | Square Cut, Beveled | Square Cut | Yes | ±1° |
| Standards Compliance | ASTM A992, A36, A572 | A992 | Multiple | Full compliance |
| Section Modulus | Per AISC Manual | Calculated | Standard | AISC 360 |
| Packaging | Bundles, Loose | Bundles | Custom | Export standard |
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Our Advantages in Processing เหล็กลิ่มร้อน
High Temperature Rolling Process
The hot rolling process occurs at temperatures above 900°C, allowing the steel to be shaped more easily while maintaining uniform molecular structure. This results in better material flow and reduced internal stress, producing beams with consistent mechanical properties throughout.
Enhanced Structural Integrity
Hot rolling creates a refined grain structure in the steel, significantly improving its strength-to-weight ratio and overall structural integrity. The process eliminates potential weak points and ensures homogeneous material properties across the entire beam length.
Superior Surface Quality
The high-temperature manufacturing process enables better surface finishing by reducing the formation of scale and surface defects. This results in smoother beam surfaces that require minimal post-processing and provide better coating adhesion for rust protection.
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