2024 aluminum flat bar is a high-strength Al-Cu-Mg alloy bar supplied in rectangular cross-section. Known for excellent fatigue resistance and machinability, it is widely used in aerospace structural components, fittings, and precision-machined parts. Linsy Aluminum offers 2024 flat bar in O, T3, T4, T351, and T851 tempers with full mill test certificates.
可选格式： flat bar (rectangular cross-section)
常见脾气： O / T3 / T4 / T351 / T851
处理支持： CNC machining / milling / cutting / anodizing
质量文件： 每笔订单均附有MTC报告
2024 aluminum flat bar is a rectangular cross-section bar made from 2024 aluminum alloy, a heat-treatable Al-Cu-Mg alloy. The flat bar form factor is particularly suited for structural brackets, supports, guide rails, and machined components where a rectangular profile is required. 2024 alloy provides one of the highest strength-to-weight ratios among aluminum alloys, making it a preferred material in aerospace and high-performance engineering applications.
Flat bars are typically supplied in T3 and T351 tempers for maximum strength, or in O temper for applications requiring subsequent forming. The T851 temper is used for components requiring elevated temperature stability.
| 合金 | 脾气 | 宽度（毫米） | 厚度（毫米） | 长度（毫米） |
|---|---|---|---|---|
| 2024 Flat Bar | O, T3, T4, T351, T851 | 10-300 | 3-80 | 1000-6000 |
| 可根据要求提供定制尺寸 | ||||
| 宽度（毫米） | 厚度（毫米） | 典型应用 |
|---|---|---|
| 25 | 5 | Structural brackets, supports |
| 40 | 8 | Machine parts, guide rails |
| 50 | 10 | Fittings, mounting plates |
| 75 | 15 | High-stress structural components |
| 100 | 20 | Aerospace structural parts |
| 150 | 30 | Heavy-duty brackets, tooling |
| 标准 | 名称 |
|---|---|
| AA（美国） | 2024 |
| EN（欧洲） | EN AW-2024 |
| DIN（德国） | 3.1355 / AlCu4Mg1 |
| 国际标准化组织 | AlCu4Mg1 |
| UNS | A92024 |
| GB（中国） | 2A12 |
| JIS（日本） | A2024 |
| 要素 | 内容 (%) |
|---|---|
| Si | 最大 0.50 |
| 铁 | 最大 0.50 |
| 铜 | 3.8-4.9 |
| 锰 | 0.30-0.90 |
| 镁 | 1.2-1.8 |
| Cr | 最大 0.10 |
| 锌 | 最大 0.25 |
| Ti | 0.15 最大值 |
| 其他（每项） | 0.05 最大值 |
| 其他（共计） | 0.15 最大值 |
| Al | 平衡 |
| 财产 | 2024-O | 2024-T3 | 2024-T351 | 2024-T851 |
|---|---|---|---|---|
| 拉伸强度，极限（兆帕） | 186 | 483 | 462 | 517 |
| 拉伸强度，屈服点（兆帕） | 76 | 345 | 324 | 455 |
| 剪切强度（兆帕） | 124 | 283 | 262 | 276 |
| 断裂伸长率（%） | 20 | 18 | 17 | 7 |
| 硬度（布氏硬度） | 47 | 120 | 120 | 137 |
| 脾气 | 特点 | Typical Use for Flat Bar |
|---|---|---|
| O | 退火状态，最大成型性，最低强度 | Forming, bending, subsequent machining before heat treatment |
| T3 | Solution heat-treated, cold worked, naturally aged. Highest strength | Aerospace brackets, structural supports, fittings |
| T4 | 固溶热处理、自然时效（无冷加工） | Components requiring moderate forming after heat treatment |
| T351 | 溶液热处理、拉伸应力释放、自然老化 | Machined aerospace parts, precision components |
| T851 | 固溶热处理、应力消除、人工时效 | High-temperature structural applications |
2024 flat bar delivers exceptional strength in T3 and T351 tempers, with ultimate tensile strength up to 483 MPa. This makes it suitable for load-bearing structural components where weight reduction is critical.
2024 flat bar machines very well in T3 and T351 conditions. The rectangular profile provides stable work-holding for CNC milling, drilling, and surface machining operations, producing excellent surface finish and dimensional accuracy.
The alloy exhibits excellent fatigue resistance, particularly in T3 temper. This is essential for flat bar components subject to cyclic loading in aerospace and mechanical applications.
2024 has lower corrosion resistance compared to 6xxx and 7xxx series alloys. For corrosive environments, anodizing or protective coating is recommended. In aerospace applications, Alclad protection or chromate conversion coating is commonly applied.
2024 aluminum flat bar can be further processed to meet specific requirements:
For forming and bending operations, O temper flat bar is recommended. After forming, the material can be solution heat-treated and aged to achieve T3 or T4 properties.
Every 2024 aluminum flat bar order from Linsy Aluminum is accompanied by a Mill Test Certificate (MTC) documenting chemical composition, mechanical properties, and dimensional verification. SGS test reports are available on request for independent third-party verification.
Linsy Aluminum operates under ISO 9001 (quality management), ISO 14001 (environmental management), and ISO 45001 (occupational health and safety) certifications. Dimensional inspection, straightness verification, and surface defect examination are performed on all flat bar products.
Linsy Aluminum is a Shenzhen-based aluminum supplier with over 20 years of experience. We supply 2024 aluminum flat bar in standard and custom dimensions, with full traceability from ingot to finished product.
Our capabilities include CNC machining, cutting, and surface finishing. Typical custom lead time is 10-60 days depending on dimensions, quantity, and processing requirements. We export to Europe, South Africa, Brazil, Singapore, Turkey, Japan, South Korea, and other markets.
Contact our technical team for temper selection guidance, custom size quotations, and material certifications.
What sizes are available for 2024 aluminum flat bar?
Standard widths range from 10 to 300 mm, thicknesses from 3 to 80 mm, and lengths from 1000 to 6000 mm. Custom dimensions are available on request.
What is the difference between flat bar and rectangular bar?
Flat bar and rectangular bar refer to the same product form: a bar with a rectangular cross-section where the width is significantly greater than the thickness.
Can 2024 flat bar be bent or formed?
In the O (annealed) temper, 2024 flat bar can be bent and formed. After forming, it can be solution heat-treated and aged to achieve T3 or T4 properties. Forming in T3 or T351 tempers is not recommended due to cracking risk.
Is 2024 flat bar weldable?
Conventional arc welding is not recommended for 2024 due to solidification cracking. Mechanical fastening (riveting, bolting) is the standard joining method.
What is the surface finish of as-supplied flat bar?
Standard supply condition is mill finish. Anodizing, polishing, and other surface treatments are available on request.
最小起订量是多少？
MOQ varies by size and temper. Contact our sales team for specific requirements.
通常的交货周期是多久？
Custom orders typically ship in 10-60 days depending on dimensions, quantity, and processing.
提供哪些认证？
林西铝业持有ISO 9001、ISO 14001及ISO 45001认证。每份订单均附带MTC报告。可根据要求提供SGS测试报告。.
Do you provide cutting to size?
Yes, we offer cutting to custom lengths as well as CNC machining services.
你们是否进行国际出口？
是的，我们出口至欧洲、南非、巴西、新加坡、土耳其、日本、韩国及其他市场。.
林西优势
林西铝业是铝加工产品的领先供应商，服务于航空航天、通用工程、汽车、船舶和其他专业工业应用等多个行业。
我们致力于保持最高标准的质量和环境责任，我们的认证证明了这一点：ISO 9001:2008、ISO 14001:2004 和 SGS 认证。
