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Technical Specifications
Product Overview
12L14 Cold Rolled Flat Bar is a free-machining carbon steel with excellent machinability characteristics. This leaded steel grade contains sulfur and lead additions that improve chip formation and reduce tool wear during machining operations, making it ideal for high-volume production applications.
Key Features:
- Excellent machinability with superior chip formation
- Good surface finish capabilities
- Enhanced tool life due to lead content
- Consistent dimensional accuracy from cold rolling process
- Cost-effective for high-volume machining operations
Manufacturing Process: Cold rolled from hot rolled billets through precision rolling mills, ensuring tight dimensional tolerances and improved surface finish. The cold working process enhances strength and provides excellent dimensional stability.
Applications: Precision machined components, automotive parts, fasteners, pins, bushings, valve components, instrument parts, and general machining applications where excellent machinability is required.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | AISI 12L14 Requirement |
|---|---|---|---|---|
| Carbon (C) | 0.15 | 0.35 | 0.25 | 0.15-0.35 |
| Manganese (Mn) | 0.85 | 1.15 | 1.00 | 0.85-1.15 |
| Phosphorus (P) | 0.04 | 0.09 | 0.065 | 0.04-0.09 |
| Sulfur (S) | 0.26 | 0.35 | 0.30 | 0.26-0.35 |
| Lead (Pb) | 0.15 | 0.35 | 0.25 | 0.15-0.35 |
| Silicon (Si) | - | 0.30 | 0.15 | ≤ 0.30 |
| Chromium (Cr) | - | 0.20 | 0.10 | ≤ 0.20 |
| Nickel (Ni) | - | 0.25 | 0.12 | ≤ 0.25 |
| Iron (Fe) | Balance | Balance | 97.8 | Balance |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | - | 580 MPa | ASTM A370 | Room Temp |
| Yield Strength (0.2%) | - | 415 MPa | ASTM A370 | Room Temp |
| Elongation | - | 22% | ASTM A370 | Room Temp |
| Reduction of Area | - | 50% | ASTM A370 | Room Temp |
| Hardness (Brinell) | - | 163 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | - | 83 HRB | ASTM E18 | Room Temp |
| Modulus of Elasticity | - | 200 GPa | ASTM E111 | Room Temp |
| Impact Energy (Charpy V) | - | 54 J | ASTM E23 | Room Temp |
🔬 Physical Properties
| Property | Value | Unit | Temperature | Test Standard |
|---|---|---|---|---|
| Density | 7.87 | g/cm3 | 20¡ãC | ASTM B311 |
| Melting Point | 1425-1540 | ¡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 | 162 | nΩ·m | 20¡ãC | ASTM B193 |
| Magnetic Permeability | Ferromagnetic | - | Room Temp | ASTM A342 |
| Curie Temperature | 770 | ¡ãC | - | Magnetic analysis |
📏 Product Specifications
| Specification | Available Range | Standard Size | Custom Available | Tolerance |
|---|---|---|---|---|
| Width | 6mm - 200mm | Various | Yes | ±0.13mm |
| Thickness | 3mm - 50mm | Various | Yes | ±0.08mm |
| Length | 1m - 6m | 3m | Yes | +25mm/-0mm |
| Surface Finish | Cold Rolled, Turned | Cold Rolled | Yes | Ra ≤ 1.6μm |
| Edge Condition | Square, Rounded | Square | Yes | ASTM A108 |
| Straightness | - | Standard | Precision | 0.5mm/m max |
| Standards Compliance | ASTM A108, SAE J403 | ASTM A108 | Multiple | Full compliance |
| Heat Treatment | Cold Drawn, Annealed | Cold Drawn | Yes | Customer spec |
| 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 12L14 เหล็กแผ่นเรียบรีดเย็น
Superior Cold Rolling Process
Advanced cold rolling technology ensures exceptional dimensional accuracy and surface smoothness. This process creates a consistent grain structure throughout the material, resulting in improved strength and hardness compared to hot-rolled alternatives.
Precision Flat Bar Formation
The specialized flat bar manufacturing process delivers tight tolerance control and excellent straightness. This enables superior machinability and consistent performance across the entire length of the bar for precise manufacturing applications.
Enhanced Surface Finish Control
Cold rolling process produces a superior surface finish with minimal imperfections. This reduces the need for additional finishing operations and ensures optimal material performance in high-precision machining operations.
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