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Technical Specifications
Product Overview
Hot Rolled Steel Railcap/Handrail is manufactured from high-quality carbon steel using hot rolling processes, providing excellent strength and durability for railing applications. This structural steel component is designed to meet demanding requirements for safety barriers, handrails, and architectural railing systems.
Key Features:
- High strength-to-weight ratio for structural applications
- Excellent weldability and machinability
- Cost-effective solution for railing systems
- Good impact resistance and toughness
- Available in various profiles and dimensions
Manufacturing Process: Hot rolled using controlled temperature processes to achieve optimal mechanical properties and dimensional accuracy. Surface scale removal and finishing options available upon request.
Applications: Stair handrails, balcony railings, safety barriers, architectural railings, industrial walkways, bridge railings, and general structural applications requiring reliable strength and durability.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A36 Requirement |
|---|---|---|---|---|
| Carbon (C) | - | 0.26 | 0.20 | ≤ 0.26 |
| Manganese (Mn) | 0.80 | 1.20 | 1.00 | 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 | 0.15 | ≤ 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 | 480 MPa | ASTM A370 | Room Temp |
| Yield Strength | 250 MPa min | 280 MPa | ASTM A370 | Room Temp |
| Elongation | 20% min | 25% | 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) | - | 120 J | ASTM E23 | Room Temp |
🔬 Physical Properties
| Property | Value | Unit | Temperature | Test Standard |
|---|---|---|---|---|
| Density | 7.85 | g/cm3 | 20¡ãC | ASTM B311 |
| Melting Point | 1510-1540 | ¡ãC | - | DSC Analysis |
| Thermal Conductivity | 50.2 | W/m·K | 100¡ãC | ASTM E1461 |
| Specific Heat | 460 | J/kg·K | 0-100¡ãC | ASTM C351 |
| Linear Expansion | 11.7 | μm/m·K | 0-100¡ãC | ASTM E228 |
| Electrical Resistivity | 170 | nΩ·m | 20¡ãC | ASTM B193 |
| Magnetic Permeability | High | μ/μ₀ | Room Temp | ASTM A342 |
| Curie Temperature | 770 | ¡ãC | - | Ferromagnetic |
📏 Product Specifications
| Specification | Available Range | Standard Length | Custom Available | Tolerance |
|---|---|---|---|---|
| Profile Dimensions | 50mm - 200mm width | Various | Yes | ±2mm |
| Thickness | 8mm - 25mm | 12mm | Yes | ±1mm |
| Length | 3m - 12m | 6m | Yes | +50mm/-0mm |
| Surface Finish | Hot Rolled, Pickled | Hot Rolled | Yes | Ra ≤ 12.5μm |
| Edge Condition | Mill Edge, Rounded | Mill Edge | Yes | Standard |
| Profile Type | Flat Bar, Rounded Top | Flat Bar | Yes | Custom shapes |
| Standards Compliance | ASTM A36, EN 10025 | ASTM A36 | Multiple | Full compliance |
| Coating Options | Galvanized, Painted | Uncoated | Yes | ASTM A123 |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Pallets | Bundles | Custom | Export standard |
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Our Advantages in Processing 熱間圧延鋼レールキャップ/手すり
High Temperature Rolling Process
The hot rolling process occurs at temperatures above 900°C, allowing for optimal material formability and uniform molecular structure throughout the steel. This results in superior strength and consistency in the final railcap product.
Enhanced Structural Integrity
Hot rolling creates a refined grain structure within the steel, significantly improving its mechanical properties and reducing internal stresses. This manufacturing method ensures better ductility and impact resistance in the finished handrail.
Smooth Surface Finish
The high-temperature rolling process naturally produces a smoother surface finish compared to cold-rolled alternatives, requiring minimal post-processing. This results in reduced manufacturing costs while maintaining excellent aesthetic quality.
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