Automotive aluminum alloys have formed a diversified product matrix, covering multiple fields such as body structure, safety components and functional modules. 6xxx series Al-Mg-Si alloys have become the mainstream choice for body panels with excellent comprehensive performance. 5 series alloys provide lightweight solutions for safety components and battery housings.
EN AW 6016 has both high strength and excellent formability through composition optimization and process improvement. Its tensile strength reaches 190-240MPa, yield strength ≥80MPa, and it has excellent paint hardening effect, which is particularly suitable for lightweight design of body panels and structural parts:
Car body outer panel: 6016 aluminum sheet achieves high surface quality and deep drawing performance through grain refinement technology, meets the forming requirements of complex curved surfaces such as four doors, two covers, and side panels, and has been successfully tested in European and domestic brand models.
Inner panels and reinforcements: The combination of 6016-T4P and 6451-T4P can improve the structural strength of the door inner panels and the hood inner panels, and at the same time, through the optimization of the baking hardening process, ensure the dimensional stability of long-term use.
As a typical representative of Al-Mg alloys, Al 5754 is known for its medium strength, excellent corrosion resistance and welding performance. The magnesium content in its chemical composition reaches 2.6%-3.6%, which gives the material good processing formability and fatigue resistance. In the automotive field, 5754 alloy has been applied in multiple scenarios by optimizing the heat treatment process (such as IIC and REC states):
Body inner panels and structural parts: 5754 aluminum plate has become the preferred material for inner panels of European and American automakers due to its recyclable characteristics, taking into account both lightweight and environmental protection needs.
Safety and sealing system: Its good weldability and surface quality make it suitable for scenes with high reliability requirements such as door seals and pressure vessels.
New energy field: In the battery pack structure, 5754 sheet has become one of the mainstream materials for battery trays by optimizing the grain structure to meet the high fatigue strength and heat dissipation requirements.
The mature application of 5754 and 6016 reflects the three major development directions of automotive aluminum alloy technology:
Generational upgrade: From standard alloys (such as Al 5754) to advanced alloys (such as 6016 aluminum), and then to multi-layer composite materials, material performance continues to break through.
Full life cycle management: Reduce environmental load and respond to the trend of green manufacturing through recyclable design (such as 5754-REC) and process optimization.
Cross-domain collaboration: In the field of new energy, aluminum alloy and battery technology are deeply integrated to promote the integration and efficiency of battery housing, PACK and other components.
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