2024 aluminum round bar (UNS A92024, EN AW-2024) is a high-strength, heat-treatable copper alloy known for its exceptional fatigue resistance and high strength-to-weight ratio. Linsy supplies 2024 aluminum round bar in tempers O, T3, T4, T351, and T851, with diameters from 5 mm to 300 mm and custom cut-to-length services. Widely used in aerospace structural parts, fasteners, gears, shafts, and hydraulic valve bodies. Every order includes an MTC report, and SGS test reports are available on request.
Product form: aluminum round bar / rod
Typowe temperamenty: O / T3 / T4 / T351 / T851
Wsparcie w zakresie przetwarzania: CNC machining / turning / milling / drilling / surface finishing
Dokumenty dotyczące jakości: Do każdego zamówienia dołączany jest raport MTC; raporty z badań SGS dostępne są na żądanie
2024 aluminum alloy (UNS A92024, EN AW-2024) is a precipitation-hardened 2000 series wrought aluminum alloy alloyed primarily with copper (Cu), magnesium (Mg), and manganese (Mn). Its nominal composition of approximately 4.4% copper, 1.5% magnesium, and 0.6% manganese enables strong precipitation hardening, producing tensile strengths comparable to many steels at roughly one-third the density.
2024 is one of the most widely used high-strength aluminum alloys in the aerospace industry. It is valued for its excellent fatigue resistance, high strength-to-weight ratio, and good machinability. The alloy is commonly supplied in the T3 and T4 tempers for applications requiring a strong combination of strength and toughness, and in T351 or T851 for components that require improved dimensional stability during machining.
However, 2024 has notable limitations. Its high copper content significantly reduces corrosion resistance compared to 5xxx and 6xxx series alloys. For outdoor or corrosive environments, 2024 components should be protected with Alclad (pure aluminum cladding), anodizing, painting, or chemical conversion coatings. The alloy is also difficult to weld by conventional arc welding due to susceptibility to hot cracking — mechanical fastening or friction stir welding is preferred.
2024 aluminum round bar is covered under ASTM B211 (bar and rod), AMS 4125 (T3 round bar), AMS 4126 (T351 round bar), and related aerospace material specifications.
Linsy supplies 2024 aluminum round bar in standard and custom diameters, with both metric and imperial dimensions available. Custom cut-to-length, peeling (centerless turning), and surface finishing can be specified at order.
| Średnica (mm) | Długość (mm) | Typowe temperamenty | Typical Tolerance |
|---|---|---|---|
| 5 – 20 | 1000 – 6000 (custom cutting available) | O, T3, T4 | ASTM B211 / h9–h11 |
| 20 – 80 | 1000 – 6000 (custom cutting available) | O, T3, T4, T351, T851 | ASTM B211 / h9–h11 |
| 80 – 200 | 1000 – 6000 (custom cutting available) | O, T351, T851 | ASTM B211 / h11 |
| 200 – 300 | 1000 – 6000 (custom cutting available) | O, T351 | ASTM B211 / h11 |
Linsy can supply 2024 aluminum round bar in non-standard diameters and lengths. If your project requires a specific size not listed above, please contact our technical team to confirm feasibility and lead time.
| Temperament | Stan | Kluczowe cechy charakterystyczne | Typowe zastosowanie |
|---|---|---|---|
| O | Wyżarzony (całkowicie miękki) | Lowest strength, maximum formability, easy to machine or form | Forming before heat treatment, prototype machining |
| T3 | Solution heat-treated, cold-worked, and naturally aged | High strength, excellent fatigue resistance, good machinability | Aircraft structural parts, fasteners, fittings, gears, shafts |
| T4 | Solution heat-treated and naturally aged (no cold work) | High strength with good ductility, slightly lower than T3 | Structural components, machine parts requiring moderate forming |
| T351 | Poddane obróbce cieplnej, odprężone przez rozciąganie, naturalnie postarzone | Same strength as T4 with reduced residual stress for better dimensional stability | Precision-machined components, hydraulic valve bodies, tight-tolerance parts |
| T851 | Solution heat-treated, stress-relieved by stretching, artificially aged | Highest strength, improved creep resistance, reduced residual stress | High-stress structural parts, aerospace components operating at elevated temperature |
2024 aluminum alloy is recognized under multiple international designation systems. The table below lists the most commonly referenced equivalents and applicable standards for round bar products.
| Standard / System | Oznaczenie |
|---|---|
| UNS | A92024 |
| EN (europejski) | EN AW-2024 / AlCu4Mg1 |
| Werkstoff (Germany) | 3.1355 |
| BS (British) | 2024 |
| ISO | AlCu4Mg1 |
| JIS (Japonia) | A2024 |
| GB (Chiny) | 2A12 (LY12) |
Applicable standards for round bar: ASTM B211 (aluminum bar, rod), AMS 4125 (2024-T3 round bar), AMS 4126 (2024-T351 round bar), AMS QQ-A-225/6, EN 755 (extruded bar/rod/profile), EN 586 (forgings)
The table below shows the chemical composition limits for 2024 aluminum alloy in accordance with ASTM B209 / EN 573-3. Values are expressed as weight percentage (%).
| Element | Chemical Symbol | Min (%) | Maks. (%) |
|---|---|---|---|
| Krzem | Si | — | 0.50 |
| Żelazo | Fe | — | 0.50 |
| Miedź | Cu | 3.80 | 4.90 |
| Mangan | Mn | 0.30 | 0.90 |
| Magnez | Mg | 1.20 | 1.80 |
| Chrom | Cr | — | 0.10 |
| Cynk | Zn | — | 0.25 |
| Tytan | Ti | — | 0.15 |
| Other Elements (Each) | — | — | 0.05 |
| Other Elements (Total) | — | — | 0.15 |
| Aluminium | Al | Równowaga | |
The mechanical properties of 2024 aluminum round bar vary significantly by temper condition. The table below provides typical reference values for commonly supplied tempers. Actual values depend on product form, diameter, and manufacturing conditions — representative values from your order’s MTC report should be used for design purposes.
| Temperament | Stan | Wytrzymałość na rozciąganie (MPa) | Granica plastyczności (MPa) | Elongation A50 (%) | Wytrzymałość na ścinanie (MPa) | Wytrzymałość zmęczeniowa (MPa) |
|---|---|---|---|---|---|---|
| O | Wyżarzony | ≤ 220 | ≤ 100 | ≥ 12 | 125 | 90 |
| T3 | Solution heat-treated, cold-worked, naturally aged | ≥ 470 | ≥ 325 | ≥ 14 | 285 | 140 |
| T4 | Poddane obróbce cieplnej, naturalnie postarzane | ≥ 440 | ≥ 290 | ≥ 15 | 270 | 135 |
| T351 | Poddane obróbce cieplnej, odprężone przez rozciąganie, naturalnie postarzone | ≥ 455 | ≥ 315 | ≥ 12 | 285 | 140 |
| T851 | Solution heat-treated, stress-relieved by stretching, artificially aged | ≥ 485 | ≥ 440 | ≥ 6 | 295 | 120 |
Uwaga: T351 and T851 include stress-relief by stretching (1–3% permanent strain) to reduce internal residual stress, improving dimensional stability during machining. These tempers are recommended for precision-machined round bar components and tight-tolerance parts. The mechanical property values above are typical reference values based on ASTM B211 and AMS specifications. Contact our team for project-specific MTC data.
2024 aluminum in the T3 temper achieves tensile strengths of approximately 470 MPa, making it one of the strongest commercially available aluminum alloys. This high strength-to-weight ratio makes 2024 round bar a preferred material for aerospace and defense applications where weight reduction is critical without compromising structural integrity.
2024 exhibits excellent fatigue resistance, particularly in the T3 temper, making it suitable for cyclic loading applications such as aircraft structural parts, gears, and shafts. The alloy’s fatigue performance is one of the key reasons it remains a standard choice in aerospace structural design despite its lower corrosion resistance.
In the T3, T351, and T851 tempers, 2024 round bar offers good machinability with favorable chip formation and surface finish. The alloy responds well to CNC turning, milling, and drilling operations using carbide tooling at moderate to high cutting speeds. For precision-machined components, T351 is recommended due to its reduced residual stress and improved dimensional stability.
Due to its high copper content (3.8–4.9%), 2024 aluminum has significantly lower corrosion resistance than 5xxx, 6xxx, and 7xxx series alloys. The copper-rich phases are anodic to the aluminum matrix, leading to localized pitting corrosion in chloride-containing environments. For outdoor or corrosive service, 2024 round bar components should be protected with anodizing, painting, chemical conversion coatings, or used as internal components within sealed assemblies.
2024 aluminum is classified as difficult to weld by conventional TIG and MIG processes. The high copper content promotes hot cracking in the weld heat-affected zone, and welded joints typically exhibit significantly reduced mechanical properties. For structural applications, mechanical fastening (bolts, rivets) or friction stir welding (FSW) are the preferred joining methods. If arc welding is unavoidable, specialized filler wires (such as 2319 or 4043) and carefully controlled procedures are required.
2024 aluminum round bar is widely used in industries where high strength, fatigue resistance, and good machinability are critical. The table below outlines common application areas and the reasons 2024 round bar is selected.
| Przemysł | Typowe zastosowania | Why 2024 Round Bar Is Used |
|---|---|---|
| Lotnictwo i kosmonautyka | Aircraft structural parts, fuselage components, wing tension members, fasteners and fittings | High strength-to-weight ratio, excellent fatigue resistance, proven aerospace service history |
| Defense & Military | Military aircraft components, weapons platforms, structural fittings | High strength in T3 and T851 tempers, good ballistic properties for aluminum |
| Motoryzacja | Engine components, gears and shafts, precision machine parts | High strength and good machinability for precision-machined rotating components |
| Urządzenia przemysłowe | Hydraulic valve bodies, machine tool parts, heavy-duty brackets | High compressive strength, good wear resistance, machinable to tight tolerances |
| Sprzęt sportowy | Bicycle components, high-strength sporting parts | High strength, low weight, good fatigue resistance for cyclic loading |
2024 aluminum round bar machines well in the T3, T351, and T851 tempers using carbide tooling at moderate to high cutting speeds. Chips are moderately short and manageable. Coolant or cutting fluid is recommended for deep drilling and heavy turning operations to manage heat and improve surface finish. For precision parts, T351 bar stock is recommended due to its lower residual stress and improved dimensional stability during machining.
2024 round bar can be centerless turned (peeled) to achieve tight dimensional tolerances and improved surface finish. This process is commonly applied to bar stock destined for precision-machined components such as hydraulic valve bodies and aerospace fittings. Centerless ground bar in T351 temper is available on request for applications requiring h8 or tighter tolerances.
Due to its poor corrosion resistance, 2024 round bar components intended for outdoor or corrosive environments should be protected. Common surface treatments include:
2024 is classified as difficult to weld by conventional TIG and MIG processes due to its susceptibility to hot cracking and strength loss in the heat-affected zone. Where joining is required, use mechanical fasteners (bolts, rivets), adhesive bonding, or friction stir welding (FSW). If arc welding is unavoidable, use 2319 or 4043 filler wire with strict procedure control and post-weld heat treatment.
Every order of 2024 aluminum round bar from Linsy includes a Mill Test Certificate (MTC) documenting the heat number, chemical composition, mechanical properties, and dimensional tolerances of the supplied material.
Available quality documents:
Linsy operates under ISO 9001, ISO 14001, and ISO 45001 management system standards, with quality control covering the full process from raw material selection to finished product inspection.
Linsy Aluminum is a Shenzhen-based aluminum factory with more than 20 years of industry experience. We supply 2024 aluminum round bar in standard and custom diameters, with both stock inventory and low-MOQ custom production available.
What you get when you source 2024 round bar from Linsy:
Learn more about 2024 aluminum alloy properties, temper selection, and comparison guides from our technical blog:
What is 2024 aluminum round bar used for?
2024 aluminum round bar is primarily used for high-strength structural and mechanical applications. Typical uses include aircraft structural parts, fasteners and fittings, machine parts, gears and shafts, and hydraulic valve bodies. Its high strength-to-weight ratio, excellent fatigue resistance, and good machinability make it ideal for precision-machined components in aerospace, defense, and industrial equipment.
What is the difference between 2024-T3 and 2024-T4 round bar?
Both are solution heat-treated and naturally aged, but T3 includes a cold-working step (typically stretching or drawing) after quenching, which slightly increases strength. T3 typically has tensile strength around 470 MPa vs. 440 MPa for T4. T3 is more commonly specified for aerospace applications, while T4 is used where slightly higher ductility is acceptable.
What is the difference between 2024-T351 and 2024-T851?
Both tempers include stress-relief by stretching after quenching. T351 is naturally aged (similar to T4 with stress relief), providing high strength with good ductility. T851 is artificially aged (similar to T6 with stress relief), providing the highest strength but lower ductility. T351 is preferred for precision-machined parts requiring dimensional stability, while T851 is used for high-stress components operating at elevated temperatures.
Is 2024 aluminum round bar weldable?
No, 2024 is classified as difficult to weld by conventional TIG and MIG processes due to its high copper content, which promotes hot cracking in the heat-affected zone. Mechanical fastening (bolts, rivets), adhesive bonding, or friction stir welding (FSW) are the preferred joining methods. If arc welding is unavoidable, use 2319 or 4043 filler wire with strict procedure control.
Can 2024 aluminum round bar be anodized?
Yes, but the anodized appearance will differ from 6xxx series alloys. Due to its high copper content, 2024 anodized films tend to appear yellowish or greyish and are less transparent than those on 6061. For corrosion protection, hard anodizing or chemical conversion coatings may be more effective than standard sulfuric acid anodizing.
Why does 2024 aluminum have poor corrosion resistance?
The high copper content (3.8–4.9%) in 2024 creates copper-rich intermetallic phases that are cathodic to the aluminum matrix. In corrosive environments, these phases accelerate localized pitting and galvanic corrosion. For outdoor or corrosive service, 2024 components should be protected with anodizing, painting, chemical conversion coatings, or used as internal components within sealed assemblies.
Does Linsy provide MTC for 2024 aluminum round bar?
Yes. Every order of 2024 aluminum round bar from Linsy includes a Mill Test Certificate (MTC) documenting the heat number, chemical composition analysis, mechanical test results, and dimensional inspection data.
What diameters of 2024 aluminum round bar can I order?
Linsy supplies 2024 round bar from 5 mm to 300 mm in diameter, in lengths up to 6000 mm with custom cutting available. Non-standard diameters can be produced on request. Contact us with your dimensional requirements for a quotation.
What is the minimum order quantity (MOQ) for 2024 aluminum round bar?
Linsy supports low-MOQ orders. Standard stock items can be shipped in small quantities, and custom production runs have flexible minimums depending on the specification. Contact us with your part drawing or requirements for a quotation.
What is the typical lead time for 2024 aluminum round bar orders?
Stock items ship within a few working days. Custom production orders typically take 10–60 days, depending on diameter, temper, processing requirements, and order quantity.
What payment and shipping terms do you accept?
We offer flexible payment and shipping terms for international B2B buyers. Contact our sales team to discuss payment methods (T/T, L/C), shipping options (FOB, CIF, DAP), and delivery to your region.
Can you process 2024 round bar parts to my drawings?
Yes. Our in-house CNC machining facility can produce finished parts from 2024 round bar stock according to your technical drawings. Submit your drawing or 3D model for a machining quotation.
Do you supply 2024 round bar to export markets?
Yes. Linsy exports aluminum products to Europe, the Americas, Southeast Asia, the Middle East, and other regions. Our ISO 9001 quality system and MTC documentation support international procurement and compliance requirements.
Zalety Linsy
Linsy Aluminium jest wiodącym dostawcą produktów do obróbki aluminium, obsługującym różne branże, w tym lotnictwo, inżynierię ogólną, motoryzację, przemysł morski, stoczniowy i inne specjalistyczne zastosowania przemysłowe.
Dążymy do utrzymania najwyższych standardów jakości i odpowiedzialności za środowisko, o czym świadczą nasze certyfikaty: ISO 9001:2008， ISO 14001:2004 oraz SGS.
