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Technical Specifications
Product Overview
1018 Cold Rolled Steel Round Bar is a low carbon steel with excellent machinability and weldability characteristics. This mild steel grade offers good strength and ductility, making it ideal for general engineering and manufacturing applications where moderate strength is required.
Key Features:
- Excellent machinability and formability
- Good weldability with conventional methods
- Cost-effective solution for general applications
- Consistent mechanical properties
- Superior surface finish from cold rolling process
Manufacturing Process: Cold rolled from hot rolled steel through precision rolling mills, resulting in improved dimensional accuracy, surface finish, and mechanical properties compared to hot rolled material.
Applications: Machine components, shafts, pins, bolts, general fabrication, automotive parts, construction hardware, agricultural equipment, and general engineering applications requiring moderate strength and good machinability.
🧪 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) | 80-89 HRB | 85 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 | 1515-1540 | ¡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 | 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 |
|---|---|---|---|---|
| Diameter | 3mm - 300mm | Various | Yes | ±0.13mm |
| Length | 1m - 12m | 6m | Yes | +25mm/-0mm |
| Surface Finish | Cold Rolled, Turned, Ground | Cold Rolled | Yes | Ra ≤ 1.6μm |
| Straightness | 0.5mm/m max | Standard | Precision | ASTM A108 |
| End Condition | Cut, Chamfered, Threaded | Cut | Yes | ±1.5mm |
| Heat Treatment | As Rolled, Annealed | As Rolled | Yes | Controlled |
| Standards Compliance | ASTM A108, SAE 1018 | A108 | Multiple | Full compliance |
| Grade Marking | Color Code, Stamping | Color Code | Yes | Standard |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Racks, Containers | Bundles | Custom | Export standard |
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Our Advantages in Processing 1018 冷間圧延鋼丸棒
Precision Cold Rolling Process
The cold rolling manufacturing process delivers superior dimensional accuracy and surface finish compared to hot rolled alternatives. This technique reduces the material's thickness while improving its strength and hardness through work hardening.
Enhanced Surface Quality
Cold rolling produces bars with smoother surface finish and tighter tolerances than hot rolled products. The process eliminates scale formation and surface defects, resulting in bars that require minimal additional finishing.
Consistent Material Properties
The cold rolling process ensures uniform mechanical properties throughout the bar, with improved straightness and roundness. This manufacturing method creates predictable strength characteristics and superior machinability for downstream operations.
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