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Technical Specifications
Product Overview
1018 Cold Rolled Steel Hexagon Bar is manufactured from low carbon steel with excellent machinability and weldability characteristics. This cold rolled hexagonal bar offers superior dimensional accuracy and surface finish compared to hot rolled alternatives, making it ideal for precision machining applications.
Key Features:
- Excellent machinability with good surface finish
- Superior dimensional accuracy and straightness
- Good weldability and formability
- Cost-effective solution for general engineering
- Consistent mechanical properties throughout
Manufacturing Process: Cold rolled from hot rolled 1018 steel through precision rolling mills, ensuring tight dimensional tolerances and improved surface quality. The hexagonal shape is formed through specialized rolling techniques.
Applications: Machine components, fasteners, shafts, pins, general machining stock, automotive parts, construction hardware, and general engineering applications where good machinability and moderate strength 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 | 500 MPa | ASTM A370 | Room Temp |
| Yield Strength (0.2%) | 370 MPa min | 415 MPa | ASTM A370 | Room Temp |
| Elongation | 15% min | 20% | ASTM A370 | Room Temp |
| Hardness (Brinell) | 143-179 HB | 160 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | 80-88 HRB | 84 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 Size | Custom Available | Tolerance |
|---|---|---|---|---|
| Across Flats (AF) | 6mm - 100mm | Various | Yes | ±0.13mm |
| Length | 1m - 12m | 6m | Yes | +25mm/-0mm |
| Surface Finish | Cold Rolled, Bright | Cold Rolled | Yes | Ra ≤ 1.6μm |
| Straightness | 0.5mm/m max | Standard | Precision | ASTM A108 |
| End Condition | Sawn, Machined | Sawn | Yes | Square ±1¡ã |
| Corner Radius | 0.1-0.5mm | 0.3mm | Specified | ±0.1mm |
| Standards Compliance | ASTM A108, A576 | A108 | Multiple | Full compliance |
| Heat Treatment | Cold Rolled, Annealed | Cold Rolled | Yes | Specified |
| 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 Hexagonal de Aço Laminado a Frio 1018
Enhanced Surface Precision
The cold rolling process creates an exceptionally smooth surface finish with tight dimensional tolerances, resulting in superior straightness and consistency compared to hot rolled bars. This precision is crucial for machining applications.
Improved Strength Properties
Cold rolling strengthens the steel through work hardening, increasing its yield and tensile strength while maintaining excellent machinability. This process delivers better mechanical properties than standard hot rolled alternatives.
Consistent Hexagonal Shape
The cold rolling manufacturing process ensures precise hexagonal geometry with sharp, well-defined corners and consistent dimensions across the entire length, making it ideal for precise fitting and mechanical applications.
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