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Technical Specifications
Product Overview
1018 Cold Rolled Steel Flat Bar is manufactured from low carbon steel with excellent machinability and weldability characteristics. This cold-finished steel provides superior surface finish and dimensional accuracy compared to hot-rolled alternatives, making it ideal for precision applications.
Key Features:
- Excellent machinability and formability
- Superior surface finish and dimensional accuracy
- Good weldability with proper techniques
- Cost-effective solution for general fabrication
- Consistent mechanical properties throughout
Manufacturing Process: Cold rolled from hot-rolled steel through precision rolling mills, followed by annealing to achieve optimal mechanical properties and surface finish.
Applications: General fabrication, machinery components, brackets, supports, shafts, pins, bolts, structural components, automotive parts, and general engineering applications where good surface finish and dimensional accuracy are required.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A108 Requirement |
|---|---|---|---|---|
| Carbon (C) | 0.15 | 0.20 | 0.18 | 0.15-0.20 |
| Manganese (Mn) | 0.60 | 0.90 | 0.75 | 0.60-0.90 |
| Phosphorus (P) | - | 0.040 | 0.025 | ≤ 0.040 |
| Sulfur (S) | - | 0.050 | 0.030 | ≤ 0.050 |
| Silicon (Si) | - | 0.30 | 0.15 | ≤ 0.30 |
| Chromium (Cr) | - | 0.25 | 0.10 | ≤ 0.25 |
| Nickel (Ni) | - | 0.25 | 0.10 | ≤ 0.25 |
| Copper (Cu) | - | 0.30 | 0.15 | ≤ 0.30 |
| Iron (Fe) | Balance | Balance | 98.4 | Balance |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 440 MPa min | 465 MPa | ASTM A370 | Room Temp |
| Yield Strength (0.2%) | 370 MPa min | 385 MPa | ASTM A370 | Room Temp |
| Elongation | 15% min | 20% | ASTM A370 | Room Temp |
| Hardness (Brinell) | 131-179 HB | 155 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | 75-88 HRB | 82 HRB | ASTM E18 | Room Temp |
| Modulus of Elasticity | - | 205 GPa | ASTM E111 | Room Temp |
| Impact Energy (Charpy V) | - | 80+ J | ASTM E23 | Room Temp |
🔬 Physical Properties
| Property | Value | Unit | Temperature | Test Standard |
|---|---|---|---|---|
| Density | 7.87 | g/cm3 | 20¡ãC | ASTM B311 |
| Melting Point | 1510-1540 | ¡ãC | - | DSC Analysis |
| Thermal Conductivity | 51.9 | W/m·K | 100¡ãC | ASTM E1461 |
| Specific Heat | 486 | J/kg·K | 0-100¡ãC | ASTM C351 |
| Linear Expansion | 11.7 | μm/m·K | 0-100¡ãC | ASTM E228 |
| Electrical Resistivity | 159 | 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 |
|---|---|---|---|---|
| Width | 6mm - 300mm | Various | Yes | ±0.8mm |
| Thickness | 3mm - 100mm | Various | Yes | ±0.5mm |
| Length | 1m - 12m | 6m | Yes | +25mm/-0mm |
| Surface Finish | Cold Rolled, Pickled | Cold Rolled | Yes | Ra ≤ 1.6μm |
| Edge Condition | Mill Edge, Slit Edge | Mill Edge | Both | ASTM standard |
| Straightness | ±3mm/m | Standard | Precision | ASTM A108 |
| Standards Compliance | ASTM A108, A576 | A108 | Multiple | Full compliance |
| Heat Treatment | Annealed, Normalized | Annealed | Yes | Per specification |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Skids, Containers | Bundles | Custom | Export standard |
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Our Advantages in Processing 1018 冷間圧延鋼フラットバー
Superior Cold Rolling Process
The cold rolling manufacturing process creates exceptionally tight dimensional tolerances and superior surface finish, resulting in flat bars with consistent thickness and enhanced mechanical properties compared to hot-rolled alternatives.
Precise Surface Control
Cold rolling technology enables precise control over surface smoothness and flatness, producing bars with minimal surface imperfections and excellent straightness, ideal for precision machining and finishing operations.
Enhanced Material Strength
The cold working process significantly improves the material's strength and hardness through strain hardening, while maintaining excellent machinability, making it perfect for structural applications and parts manufacturing.
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