2024 Aluminum Machining for Aerospace Performance
Machining 2024 aluminum presents challenges due to its high strength, lower corrosion resistance, and tendency to tear or deform if cutting conditions are not optimized. Its copper content improves fatigue performance but demands careful control to maintain surface finish and dimensional accuracy. Commonly chosen by aerospace and transportation industries for structural applications, 2024 requires disciplined machining practices.
2024 Aluminum Properties & Tempers
2024 is a high-strength aluminum-copper alloy with roughly 4 to 5 percent copper. It is known for excellent fatigue resistance, which is why it has long been used in fuselage structures, wing tension members, and other cyclically loaded aerospace parts. Its corrosion resistance is lower than 6061, so finished parts are usually anodized, conversion coated, or supplied as Alclad sheet.
Common tempers include:
- 2024-T3: solution heat treated and cold worked. The most common temper for sheet.
- 2024-T351: solution heat treated and stress relieved by stretching. Preferred for machined plate and bar because lower residual stress means less distortion.
- 2024-T4: solution heat treated and naturally aged, with slightly lower strength than T3.
How CARR Machines 2024 Aluminum
2024 is softer and gummier than 7075, so it tears and builds up on the cutting edge when tooling or parameters are wrong. Our approach:
- Sharp, polished carbide with high-helix geometry to cut cleanly and prevent built-up edge
- Stress-relieved T351 stock and balanced material removal to limit distortion on thin walls
- Edge and surface finishes ready for anodizing or conversion coating
- Multi-axis machining for complex structural fittings in fewer setups
- CMM inspection of critical features with full documentation
2024 vs 7075 vs 6061 Aluminum
These three alloys cover most aerospace and industrial aluminum work:
- 2024: best fatigue resistance and damage tolerance, for structures under repeated load
- 7075: highest strength of the three, for highly loaded fittings and frames
- 6061: lower strength but better corrosion resistance and weldability, for general-purpose parts
If your drawing allows a substitution, our engineers can help you compare cost, lead time, and performance.
2024 Aluminum Parts We Machine
- Aerospace structural fittings, brackets, and frames
- Space and satellite structures
- Defense hardware and housings
- Transportation and automation components that see repeated loads
Advantages of Precision OUR CNC MACHINING
Modern tooling and machine control have transformed hard machining into a competitive alternative to grinding. CARR’s process delivers:
- Improved Accuracy: Fewer setups and direct CNC finishing maintain true dimensional control.
- Reduced Processing Time: Consolidated operations eliminate secondary finishing steps.
- Extended Tool Life: Optimized speeds, feeds, and coolant systems protect cutting edges.
- Consistent Finishes: Controlled tool engagement ensures uniform surface quality.
Quality and Compliance You Can Trust
Every part undergoes rigorous verification within our AS9100D- and ISO 9001:2015-certified quality system. Coordinate measuring machines (CMMs) and optical inspection tools confirm that each feature meets specified tolerances and surface requirements.
We also maintain complete traceability for all materials and processes, ensuring compliance with ITAR and other regulatory standards.
FREQUENTLY ASKED QUESTIONS
What is 2024 aluminum used for?
2024 aluminum is used for fatigue-critical structures such as aircraft fuselage and wing parts, structural fittings, and transportation components that see repeated loading.
What is the difference between 2024-T3 and 2024-T351?
Both are solution heat-treated. T3 is cold worked and common for sheet. T351 is stress-relieved by stretching, which lowers residual stress and makes plate and bar more stable during machining.
Is 2024 aluminum corrosion resistant?
Less than most aluminum alloys because of its copper content. Parts are usually anodized, conversion-coated, or made from Alclad sheet for protection.
Is 2024 stronger than 6061?
Yes. 2024 has higher strength and much better fatigue resistance than 6061. 6061 offers better corrosion resistance and weldability.
Can 2024 aluminum be welded?
2024 is generally considered poor for fusion welding, so 2024 assemblies are usually mechanically fastened. Machining features into a single part is often the better option.
Partner with CARR Machine & Tool
Ready to quote a 2024 aluminum part? Send your model, drawing, temper, and finish callouts, and our team will review them and respond with a quote.
