Special alloy aluminum profile mold opening

Customized special alloy aluminum profiles are designed for fields with extreme requirements for material performance, such as aerospace, defense industry, and high-end equipment. The 7 Series (7075/7050) and 2 Series (2024/2A12) aluminum alloys are currently the strongest series among commercial aluminum alloys and are widely used in key load-bearing components such as aircraft structural components, spacecraft, drones, and defense equipment.

7075-T6 is an Al-Zn-Mg-Cu superhard aluminum alloy, known as an "aerospace aluminum alloy", and is one of the strongest commercial aluminum alloys. After T6 solution and artificial aging, the tensile strength at room temperature reached 524MPa, the 0.2% yield strength was stable at 455MPa, the elongation was maintained at 11%, and the hardness was 150HB. The T6 state has the highest static strength, maintaining high strength below 150℃ and exhibiting particularly good low-temperature strength. 7075-T6 is comparable in strength to ordinary steel, making it an ideal material for ultra-high-strength applications such as aircraft structural components, wing main beams, and drone landing gear.

7050 aluminum alloy has characteristics such as high strength, high toughness, fatigue resistance, and damage resistance, and its manufacturing technology is known as the "ceiling" of aluminum alloys. The tensile strength of 7050 aluminum alloy can reach 500-562MPa, and the yield strength can reach 434-490MPa. It has extremely high strength and resistance to peeling corrosion and stress corrosion fracture, and is commonly used in aircraft structural parts, medium and heavy plate extrusion parts, free forging parts and die forging parts. More than 50% of the aluminum used in the fuselage of the C919 large passenger aircraft is made of 7050 aluminum alloy, which is mainly used in key load-bearing components such as wing beams and wall panels.

2A12 (2024) is an Al-Cu-Mg cemented carbide with a tensile strength of ≥420MPa and a yield strength of ≥265MPa. 2A12 alloy has excellent fatigue resistance, and its fatigue strength under alternating loads is significantly higher than that of 6-series and 5-series aluminum alloys, making it suitable for components that can withstand long-term vibration or cyclic stress. This alloy has good heat resistance. When the operating temperature is <150℃, and the temperature is higher than 125℃, the strength of 2024 alloy is even higher than that of 7075 alloy. 2A12 is an ideal material for fatigue-resistant structures such as aircraft skins and wing ribs.

01 Quality starts with raw materials

High-purity special aluminum alloy produced using A00 virgin aluminum ingots, containing no waste aluminum, with pure materials, dense structure, and stable mechanical properties. Special aluminum alloys such as 7075, 7050, and 2A12 require extremely high purity of raw materials, and virgin aluminum ingots are the foundation for ensuring the forming quality of high-performance alloys.

02 Exclusive extrusion process for special alloys

The extrusion difficulty of 2-series and 7-series aluminum alloys is much higher than that of 6-series aluminum alloys—the extrusion temperature range is narrow, the deformation resistance is high, and the mold wear is serious. Optimize extrusion temperature, speed, and cooling parameters for the characteristics of different alloy grades. 7075-T6 adopts an "online quenching + dual-stage aging" process, 7050 adopts a special aging system of T74/T7351 to ensure stress corrosion resistance, and 2A12 adopts solution treatment + artificial aging. Each special alloy section is independently designed with its own mold.

03 High-precision CNC machining

Equipped with precision equipment such as a five-axis linkage CNC machining center, it can complete deep machining processes such as precision cutting, end face milling, precision boring, drilling and tapping of special alloy profiles. The machining accuracy is ±0.01-0.005mm, and the dimensional tolerance of key assembly positions is stably controlled between ≤±0.02mm and ±0.03mm. Multiple imported machine tools and ultra-long aluminum profile processing centers have a travel distance of up to 6.5 meters.

04 Quality System and Flaw Inspection

It can meet the requirements of AMS (Aerospace Materials Specification) and GJB (National Military Standard) quality management systems. It can be combined with non-destructive testing methods such as ultrasonic flaw detection and penetration flaw detection to ensure that there are no defects such as cracks, pores, or inclusions inside the profile. Each batch provides a three-coordinate full-size inspection report, a material inspection report, and a mechanical property inspection report.

Processing capacity parameters:

Special alloy aluminum profile selection reference:

Typical application scenarios:

• Aerospace: Aircraft fuselage frame and wing rib profiles, wing main beam, landing gear support structure

• Drones: Industrial drone arms, landing gear

• Spacecraft and launch vehicles: rocket body load-bearing frame, module structural components, satellite support

• Defense industry: structural components of defense equipment, body structures of special vehicles

• High-end equipment: precision machinery spindles, high-end mold guide columns

• High-end sports equipment: high-performance bicycle racks, golf ball heads

• Airborne equipment: radar antenna structural components, airborne equipment frames, missile cabins and airfoil profiles

FAQ (Frequently Asked Questions)

Q1: What are the differences between special alloy aluminum profiles and ordinary 6-series aluminum profiles?

A: Special alloy aluminum profiles (7 series/2 series) are currently the strongest series among commercial aluminum alloys. 7075-T6 has a tensile strength of ≥524MPa and a yield strength of ≥455MPa, which is comparable to ordinary steel and far exceeds 6 series aluminum alloys (6061-T6 has a tensile strength of ≥260MPa). 7075 is known as an ultra-high strength aluminum alloy with a yield strength close to tensile strength, a high yield ratio, and high specific strength. However, the extrusion difficulty is much higher than that of 6 series-the extrusion temperature range is narrow, the deformation resistance is large, and the mold wear is serious. It is suitable for fields with extreme requirements for material performance, such as aerospace, defense industry, and high-end equipment.

Q2: How to choose three special alloys: 7075-T6, 2A12 (2024), and 7050?

A: 7075-T6 is one of the strongest commercial aluminum alloys, with a tensile strength of ≥524MPa and a hardness of 150HB. It maintains high strength below 150℃ and has particularly good low-temperature strength. It is an ideal material for ultra-high-strength scenarios such as aircraft structural components, wing main beams, and drone landing gear. 2A12 (2024) has a tensile strength of ≥420MPa, excellent fatigue resistance, and its fatigue strength under alternating loads is significantly higher than that of 6-series and 5-series alloys. It also has good heat resistance (<150℃). When the temperature is higher than 125℃, the strength of 2024 alloy is even higher than 7075. It is an ideal material for fatigue resistance structures such as aircraft skins and wing ribs. 7050 has a tensile strength of 500-562MPa and extremely high strength and resistance to peeling corrosion and stress corrosion fracture. More than 50% of the aluminum used in the fuselage of the C919 large aircraft is 7050 aluminum alloy, which is mainly used for key load-bearing components such as wing beams and wall panels. Our company recommends the most suitable material solution based on the usage scenario and performance requirements.

Q3: Why is the extrusion difficulty of special alloy aluminum profiles higher than that of the 6 series?

A: 7-series and 2-series aluminum alloys have a narrow extrusion temperature range, high deformation resistance, and severe mold wear. 6-series alloys have a wide extrusion temperature window, good fluidity, and relatively low extrusion difficulty. Special alloys (especially 7075) require strict control of aluminum bar temperature, extrusion cylinder temperature, die temperature, and extrusion speed. Even slight deviations can lead to uneven microstructure, substandard mechanical properties, or early die failure. The manufacturing technology of 7050 aluminum alloy is known as the "ceiling" of aluminum alloys, and its extrusion and heat treatment processes require extremely high standards. Our company has optimized the extrusion process for the characteristics of different alloy grades: 7075-T6 adopts the "online quenching + two-stage aging" process; 7050 adopts T74/T7351 special aging system to ensure stress corrosion resistance; 2A12 was treated with solid solution plus artificial aging.

Q4: How accurate can special alloy aluminum profiles be?

A: The dimensional tolerance of key assembly positions is stably controlled within ≤±0.02mm to ±0.03mm, the conventional dimensional tolerance is ±0.02mm to ±0.04mm, and the CNC machining accuracy is ±0.01-0.005mm. 7075 fine grains enhance deep drilling performance and improve tool wear resistance. It can meet the requirements of AMS (Aerospace Materials Specification) and GJB (National Military Standard) quality management systems. Each batch provides a three-coordinate full-size inspection report, a material inspection report, and a mechanical property inspection report.

Q5: What is the corrosion resistance of 2A12 (2024) aluminum alloy?

A: 2A12 aluminum alloy has excellent cutting performance, but poor corrosion resistance. It is usually protected by anodizing, painting, or aluminum coating. In aerospace applications, 2A12 sheets are typically coated with aluminum (pure aluminum cladding) to improve corrosion resistance. Our company can provide surface treatment solutions such as anodizing, hard oxidation, and aluminum cladding according to customer requirements to meet the corrosion resistance requirements of different usage environments.

Q6: What is the minimum order quantity and delivery time for special alloy aluminum profiles?

A: The minimum order quantity supports 50kg-level R&D sampling. The conventional structural mold opening cycle is 8-12 days for sampling, and the batch delivery date is 12-18 days after the sample is confirmed. Special alloys have longer delivery times than ordinary 6-series profiles due to their high extrusion difficulty and complex heat treatment processes (for example, 7050 requires a special aging system of T74/T7351). It is recommended to communicate the material, cross-section complexity, and testing requirements in advance.