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Technical Specifications
Product Overview
Cold Rolled Steel Sheet is manufactured through a cold reduction process that produces superior surface finish, dimensional accuracy, and mechanical properties compared to hot rolled steel. This process involves rolling the steel at room temperature, resulting in increased strength and improved surface quality.
Key Features:
- Superior surface finish and dimensional accuracy
- Enhanced mechanical properties through work hardening
- Excellent formability and weldability
- Consistent thickness tolerance throughout the sheet
- Cost-effective solution for precision applications
Manufacturing Process: Cold rolling process with controlled reduction passes, followed by annealing for improved ductility and stress relief, ensuring optimal mechanical properties and surface quality.
Applications: Automotive body panels, appliance manufacturing, construction materials, electrical enclosures, furniture components, stamping and forming operations, and general fabrication where surface quality and dimensional accuracy are critical.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A1008 Requirement |
|---|---|---|---|---|
| Carbon (C) | - | 0.15 | 0.08 | ≤ 0.15 |
| Manganese (Mn) | - | 0.60 | 0.35 | ≤ 0.60 |
| Phosphorus (P) | - | 0.030 | 0.015 | ≤ 0.030 |
| Sulfur (S) | - | 0.035 | 0.020 | ≤ 0.035 |
| Silicon (Si) | - | 0.50 | 0.25 | ≤ 0.50 |
| Aluminum (Al) | 0.020 | 0.080 | 0.040 | 0.020-0.080 |
| Copper (Cu) | - | 0.20 | 0.08 | ≤ 0.20 |
| Nitrogen (N) | - | 0.009 | 0.005 | ≤ 0.009 |
| Iron (Fe) | Balance | Balance | 99.2 | Balance |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 270-500 MPa | 380 MPa | ASTM A370 | Room Temp |
| Yield Strength (0.2%) | 140-350 MPa | 220 MPa | ASTM A370 | Room Temp |
| Elongation | 22% min | 32% | ASTM A370 | Room Temp |
| Hardness (Brinell) | - | 120 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | - | 65 HRB | ASTM E18 | Room Temp |
| Modulus of Elasticity | - | 200 GPa | ASTM E111 | Room Temp |
| Impact Energy (Charpy V) | - | 150+ 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 Size | Custom Available | Tolerance |
|---|---|---|---|---|
| Thickness | 0.15mm - 6.0mm | 1.0mm | Yes | ±0.05mm |
| Width | 600mm - 2100mm | 1250mm | Yes | ±3mm |
| Length | 1000mm - 6000mm | 2500mm | Yes | ±5mm |
| Surface Finish | Matte, Bright, Oiled | Matte | Yes | Ra ≤ 1.6μm |
| Edge Condition | Mill Edge, Slit Edge | Mill Edge | Both | ASTM standard |
| Flatness | Class 1, Class 2 | Class 2 | Yes | ≤ 5mm/m |
| Standards Compliance | ASTM A1008, JIS G3141 | A1008 | Multiple | Full compliance |
| Grade Options | CS Type A, B, C | CS Type B | Yes | Standard grades |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Coils, Sheets, Bundles | Sheets | Custom | Export standard |
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Our Advantages in Processing แผ่นเหล็กรีดเย็น
Precision Room Temperature Rolling
The cold rolling process performed at room temperature enables exceptional dimensional accuracy and thickness control, resulting in sheets with consistent specifications and minimal variations across the entire surface area.
Enhanced Surface Finish
Cold rolling creates an exceptionally smooth and uniform surface finish compared to hot-rolled products, eliminating scale and surface imperfections while providing superior aesthetics and coating adhesion properties.
Improved Material Strength
The cold rolling process induces work hardening in the material, significantly increasing its tensile strength and yield strength while maintaining excellent formability for downstream manufacturing applications.
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