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Technical Specifications
Product Overview
1018 Cold Rolled Steel Square Bar is manufactured from low carbon steel with excellent machinability and weldability characteristics. This mild steel square bar offers good strength-to-weight ratio and is ideal for general engineering and construction applications requiring precise dimensions and smooth surface finish.
Key Features:
- Excellent machinability and formability
- Good weldability with standard welding processes
- Precise dimensional tolerances from cold rolling process
- Smooth surface finish suitable for painting or plating
- Cost-effective solution for structural applications
Manufacturing Process: Cold rolled from hot rolled 1018 steel billets through precision rolling mills, ensuring tight dimensional tolerances and improved surface finish compared to hot rolled products.
Applications: Machine parts, shafts, pins, bolts, structural components, brackets, frames, general fabrication, automotive components, and construction applications where precise dimensions and good surface finish 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) | - | 0.15 | 0.08 | ≤ 0.15 |
| Nickel (Ni) | - | 0.20 | 0.10 | ≤ 0.20 |
| Copper (Cu) | - | 0.20 | 0.12 | ≤ 0.20 |
| Iron (Fe) | Balance | Balance | 98.4 | Balance |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 440 MPa min | 470 MPa | ASTM A370 | Room Temp |
| Yield Strength (0.2%) | 370 MPa min | 395 MPa | ASTM A370 | Room Temp |
| Elongation | 15% min | 20% | ASTM A370 | Room Temp |
| Hardness (Brinell) | 137 HB max | 131 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | 75 HRB max | 72 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 | 1515-1525 | ¡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 | 169 | 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 |
|---|---|---|---|---|
| Square Size | 6mm - 200mm | Various | Yes | ±0.13mm |
| Length | 1m - 12m | 6m | Yes | +25mm/-0mm |
| Corner Radius | 0.5mm - 3mm | 1.5mm | Yes | ±0.5mm |
| Surface Finish | Cold Rolled, Polished | Cold Rolled | Yes | Ra ≤ 1.6μm |
| Straightness | Standard, Precision | Standard | Yes | 1mm/m max |
| Edge Condition | Sharp, Deburred | Sharp | Yes | ASTM A108 |
| Standards Compliance | ASTM A108, A576 | A108 | Multiple | Full compliance |
| Heat Treatment | Cold Drawn, Annealed | Cold Drawn | Yes | Controlled |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Crates | Bundles | Custom | Export standard |
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Our Advantages in Processing Barra Quadrada de Aço Lamado a Frio 1018
Superior Surface Finish
Cold rolling process creates an exceptionally smooth surface finish with precise dimensional accuracy, resulting in reduced machining requirements and better aesthetic appearance compared to hot-rolled alternatives.
Enhanced Material Strength
The cold rolling manufacturing process increases the material's tensile strength and yield strength through work hardening, delivering improved mechanical properties and better structural performance.
Tight Tolerance Control
Cold rolling enables precise dimensional control and consistently square corners, maintaining tolerances within strict specifications for demanding applications where precision is crucial.
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