1. Mechanical properties

• Tensile strength can reach 580MPa

• Yield strength can reach 500MPa

• Elongation is about 8% - 12%

• Hardness reaches 160 - 180HB

2. Physical properties

• Density is about 2.8g/cm³

• Thermal expansion coefficient is about 23.5×10⁻⁶/℃

• Thermal conductivity is about 130W/(m・K)

3. Chemical composition

• Aluminum (Al) is the matrix

• Zinc (Zn) content is 7.2 - 8.2%, and the addition of zinc significantly improves the strength of the alloy;

• Magnesium (Mg) content is about 2.1 - 2.9%, which works synergistically with zinc to further enhance the strengthening effect of the alloy;

• Copper (Cu) content is 1.2 - 2.0%, which can improve the heat treatment performance and comprehensive mechanical properties of the alloy;

• Chromium (Cr, about 0.18 - 0.28%), chromium helps to improve the alloy's resistance to stress corrosion;

• Elements such as manganese (Mn, not more than 0.20%) and titanium (Ti, about 0.06 - 0.20%) play an important role in refining grains and improving alloy toughness.

4. Application fields

• Marine engineering: used in the manufacture of key components of deep-sea oil and gas extraction equipment. The weight of the pipeline is reduced by 30%, which greatly reduces the load-bearing pressure of the offshore platform and reduces the installation and maintenance costs.

• Aerospace: Manufacturing of hydraulic system pipelines for aircraft; with the advantages of high strength and light weight, it ensures that the hydraulic system operates efficiently and stably under high pressure; its good fatigue resistance can effectively cope with the alternating stress of the pipeline under complex flight conditions, improving the reliability and safety of the aircraft.

5. Precautions

• Processing: Since the alloy is sensitive to processing technology, process parameters must be strictly controlled during pipe cutting, bending and welding.

• Welding: A special welding wire that matches the alloy composition should be used, and the welding temperature and speed should be strictly controlled to prevent the performance of the pipe from decreasing due to changes in the heat-affected zone.

• Use in high-temperature environment: Pay attention to the changes in its mechanical properties with temperature. When the working temperature exceeds 120°C, it is recommended to take insulation measures to prevent the alloy strength from decreasing and affecting safety.

• Daily use: Regularly inspect the pipes, paying attention to whether the connection parts are loose or worn, and whether there are defects such as corrosion and cracks on the surface of the pipes. Once a problem is found, it should be handled in time to ensure safe and stable operation of the equipment.

6. Conclusion

From the depths of the ocean to the vast sky, EN AW-7049A aluminum alloy tubes are opening up new frontiers in the industrial field with their innovative performance, leading the industry towards a new journey of more efficient and reliable development. In the future, it will surely play a core role in more key application scenarios and inject endless vitality into global industrial development.

7. About Bolaibao

In the fierce market competition, Bolaibao focuses on EN AW-7049A aluminum alloy tubes, increases investment in scientific research, and wins trust by improving the industrial chain and efficient services. In the future, it will create more breakthroughs in the field of new materials and lead the development of the industry.

• Contact usfor detailed information and tailored solutions!

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