2618 Aluminum Round Bar
The 2618 aluminum round bar is made from a high-performance, heat-treatable aluminum alloy, designed for demanding applications. This alloy is typically classified as a 2000 series, offering excellent strength, good ductility, and outstanding thermal stability, making it the preferred choice in aerospace, motorsports, and other high-stress environments.
2618 is an Al-Cu heat-treatable aluminum alloy. Haomei Aluminum offers 2618 aluminum products in bars, tubes, plates, profiles, wires, and forgings. The addition of Cu and Mg enhances the alloy's strength and hardness, but it may affect elongation. It also exhibits good stampability, weldability, and corrosion resistance.
Specifications of 2618 Aluminum Round Bar
| Diameter | Length | Surface treatment | MOQ |
| 5-350mm | 6000mm or customized | Mill finish or customized | 1000kg |
| ≥350mm | 6000mm or customized | Mill finish or customized | 1000 |
2618 Aluminum Round Bar Standards and Certifications
- AMS 4120: Aerospace material composition and performance specifications.
- ASTM B211: Standard for aluminum alloy bars.
- Certifications: AS9100 for aerospace industry, ISO 9001 for quality management.
2618 Aluminum Round Bar Composition
2618 aluminum is a high-strength alloy primarily composed of aluminum (Al), with key alloying elements including copper (Cu: 2.2–2.8%), magnesium (Mg: 1.3–1.8%), iron (Fe: 0.9–1.3%), and nickel (Ni: 0.9–1.2%). These elements enhance the strength, thermal stability, and fatigue resistance of the alloy.
| Si | Fe | Cu | Mg | Ni | Zn | Ti | Zr | Others | Al |
| 0.10-0.25% | 0.9-1.3% | 1.9-2.7% | 1.3-1.8% | 0.9-1.2% | ≤0.1% | 0.04-0.10% | / | ≤0.5% | Balance |
2618 Aluminum Round Bar Heat Treatment
The 2618 alloy is typically subjected to solution heat treatment and artificial aging (common temper states include T6 and T6511) to achieve optimal strength and stability. This treatment helps maintain mechanical properties at temperatures approaching 300°C, making it an ideal choice for high-temperature service.
- 2618 T6 Aluminum Round Bar: Solution heat-treated and then artificially aged to optimize strength and hardness.
- 2618 T61 Aluminum Round Bar: Stress-relieved to achieve dimensional stability in precision applications.
| Product | Description |
| 2618 T6 Aluminum Round Bar | The 2618 T6 aluminum round bar undergoes solution heat treatment followed by artificial aging to optimize its strength and hardness. This treatment process enhances the alloy's mechanical properties, making it highly suitable for high-stress applications, such as aerospace components and engine parts, where excellent strength and thermal stability are crucial. |
| 2618 T61 Aluminum Round Bar | The 2618 T61 aluminum round bar undergoes stress-relieving treatment to ensure dimensional stability in precision applications. This heat treatment improves the alloy's ability to maintain tight tolerances and prevents distortion, making it especially important in high-precision, high-performance environments, particularly for manufacturing components with high accuracy requirements in aerospace and automotive industries. |
2618 Aluminum Round Bar Mechanical Properties
The 2618 alloy is designed for high-stress applications, with high tensile strength and yield strength, while maintaining moderate elongation to ensure durability and reliability under load. Its excellent fatigue resistance is especially useful in cyclic loading environments such as engine components.
| Tensile Strength | 372 MPa |
| Tensile Strength, Ultimate | 441 Mpa |
| Shear Strength | 262 Mpa |
| Fatigue Strength (completely reversed stress; RR Moore machine/specimen) | 124 Mpa |
| Elastic Modulus (AA; Typical; Average of tension and compression) | 74.5 Gpa |
| Poisson's ratio | 0.33 |
| Elongation at Break | 10% at -28.0 °C |
| 14% at 149 °C | |
| 50% at 260 °C |
2618 Aluminum Round Bar Surface Finish
2618 aluminum round bars have a smooth surface that provides excellent surface finish. This smooth surface not only makes subsequent processing and assembly easier but also offers good polishability and photoetching properties. The 2618 Aluminum Round Bar is ideal for applications that require precise surface treatments, such as aerospace parts and high-precision components.
2618 Aluminum Round Bar Applications
2618 alloy is used in aerospace structural parts, mechanical components, cabinet housings, construction and transportation, forged and free-forged parts, pistons, and aircraft engine parts.
- Aerospace: Engine parts, piston heads, and structural components requiring high-temperature performance.
- Automotive: High-performance engine parts, connecting rods.
- Industrial: Molds, tools, and machinery requiring thermal stability and durability.
| Application Field | Description |
| Aerospace | 2618 aluminum round bars are widely used in aerospace, particularly for engine parts, piston heads, and structural components requiring high-temperature performance. Due to its excellent high-temperature strength and thermal stability, 2618 alloy can withstand high temperatures and pressures in engine environments, ensuring long-term stability of components and the safe and efficient operation of aircraft. Additionally, piston heads and some important structural components rely on the good mechanical properties and heat resistance of 2618 aluminum alloy. |
| Automotive | In the automotive field, 2618 aluminum round bars are commonly used to manufacture high-performance engine components and connecting rods. Its outstanding fatigue resistance and high-temperature performance make it an ideal material for automotive engine parts subjected to high stress and temperature environments. Especially in racing and high-performance automotive engines, 2618 aluminum alloy provides the required strength and durability while maintaining lightweight, enhancing overall performance. |
| Industrial | In the industrial field, 2618 aluminum round bars are widely used in molds, tools, and machinery that require high thermal stability and durability. Due to its excellent thermal stability and fatigue resistance, 2618 aluminum alloy can effectively withstand high temperatures and heavy loads. It is commonly used to manufacture molds, cutting tools, and industrial machinery components, particularly in high-load and frequently operating environments, providing longer service life and higher work efficiency. |
2618 Aluminum Round Bar Processing
2618 aluminum round bars are produced using advanced forging and rolling technologies to ensure uniform cross-sections, strict dimensional tolerances, and consistent mechanical properties. These bars are available in various diameters and lengths and are an excellent starting material for further processing or heat treatment.
2618 Aluminum Round Bar Processing Methods
- 2618 aluminum round bars support conventional processes such as forging, extrusion, and casting, with excellent machining properties.
- Produced by extrusion or forging, with diameters ranging from 5 mm to 300 mm, lengths up to 6 meters.
- Can be processed using standard tools; TIG/MIG welding methods can be used, but professional expertise is required.
2618 Aluminum Round Bar Finishing and Tolerances
- Surface Finish: Rolled finish (extrusion), turned or polished.
- Tolerances: Diameter (±0.13 mm to ±0.38 mm) and straightness are subject to ASTM B211 standards.
2618 Aluminum Round Bar vs Other Alloys
- 2618 performs better at high temperatures compared to 2024.
- 2618 has better fatigue resistance than 7075 but lower room temperature strength.
| Comparison Item | Description |
| Compared to 2024 Aluminum Alloy | Compared to 2024 aluminum alloy, 2618 aluminum round bars exhibit superior high-temperature performance. The higher copper content in 2618 allows it to maintain better strength and stability under high-temperature conditions, making it especially suitable for aerospace and engine components working in such environments. In contrast, 2024 aluminum alloy has more limited high-temperature performance and a narrower range of applications. |
| Compared to 7075 Aluminum Alloy | Compared to 7075 aluminum alloy, 2618 aluminum round bars offer better fatigue resistance. 2618 alloy has higher durability and fatigue strength, capable of withstanding long-term cyclic loads without breaking, especially under complex loading conditions. However, 2618 has slightly lower room temperature strength than 7075, which has higher strength and hardness at room temperature, making it suitable for applications that involve high static loads. |
Selecting and Using 2618 Aluminum Round Bar
How to Choose the Right Specifications for 2618 Aluminum Round Bar?
When selecting the appropriate specification for 2618 aluminum round bars, it is essential to first determine the mechanical performance and dimensional requirements based on the application. Factors to consider include the diameter, length, strength requirements, and whether additional surface treatments (such as polishing or anodizing) are needed. For high-temperature or high-strength applications, selecting the appropriate heat treatment state (such as T6 or T61) is also crucial. Additionally, environmental factors such as temperature, corrosive conditions, and stress loads should influence the specification choice.
What to Pay Attention to During the Use of 2618 Aluminum Round Bar?
Corrosion: Anodizing or coating is required in corrosive environments.
During the use of 2618 aluminum round bars, especially in corrosive environments, extra protective measures need to be taken. Due to the higher copper content in 2618 aluminum alloy, it has lower resistance to corrosion, particularly in humid or salt-spray environments. Therefore, anodizing or coating treatment must be applied when used in such conditions.
What Special Process Protection Measures Should Be Taken for 2618 Aluminum Round Bar?
During processing and transportation, special process protection measures are usually required to prevent surface damage or contamination of 2618 aluminum round bars. Common protective measures include using surface coatings (such as grease or plastic films) to prevent oxidation or scratching. Additionally, storage in high-humidity environments should be avoided to prevent corrosion issues. For high-precision applications, protection measures also include using appropriate packaging materials to prevent mechanical damage during transportation.
2618 Aluminum Round Bar is an excellent choice for high-stress, high-temperature applications, offering a balance of strength, machinability, and thermal stability. Its use in critical aerospace and automotive components highlights its reliability in demanding conditions. Proper processing and protection measures can ensure optimal performance and service life.
