7039 aluminum alloy

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Product information

Model: 7039
Availability: Customizable 
7039 aluminum alloy is a deformation aluminum alloy of the Al-Zn-Mg system, featuring the following core performance characteristics:
Mechanical properties
High strength: Tensile strength σb ≥ 560 MPa, yield strength σp0.2 ≥ 495 MPa, belonging to medium-high strength aluminum alloy
Impact resistance: Outstanding impact resistance, suitable for high impact load scenarios such as military armor and protective structures
Lightweight: Density is 2.85 g/cm³, significantly reducing structural weight while maintaining strength
Processing and process performance
Welding performance: Good welding adaptability, suitable for high-strength welding joints, but requires re-heating after welding
Heat processing characteristics: Rheological stress is significantly affected by temperature and strain rate during high-temperature deformation, with dynamic recovery as the main deformation mechanism
Formability: Best formability in the fully annealed state, but poor formability in the heat-treated state
Special application performance
Ballistic performance: Ballistic limit value (v50) is 14.7%-17.9% lower than that of ordinary aluminum alloys, with failure modes being petal-shaped or ductile hole-shaped
Corrosion resistance: Poor corrosion resistance, requiring anodizing or coating protection
Purity: High-end models (such as AL7039) use ultra-vacuum melting technology, with porosity ≤ 0.001% and inclusion size ≤ 5 μm, suitable for harsh environments such as aircraft engines
Typical application fields
Military equipment: Armor plates, missile devices, gun frame components
Aerospace: Aircraft load-bearing components, spacecraft fuel tanks
Industrial fields: Freezing containers, fire pressure equipment, high-energy laser mirror substrates
Comparison with other aluminum alloys
In the hardness ranking, 7 series aluminum alloys (such as 7039) have the highest hardness, superior to 2 series and 6 series, etc.
Corrosion resistance is lower than 1 series and 5 series, but the comprehensive performance can be improved by optimizing the composition (such as adding Sc, Zr)

Product parameter

Chemical composition 
The chemical composition of 7039 aluminum alloy is based on aluminum as the main component, and it mainly contains the following elements (mass fraction):
‌Aluminum (Al): 100% (ensuring the stability of the material's basic properties) ‌
‌Zinc (Zn): 3.3%-5.4% ‌
‌Magnesium (Mg): 2.3%-3.3% ‌
‌Chromium (Cr): 0.15%-0.25% ‌
‌Copper (Cu): ≤0.5%-1.4% ‌
‌Iron (Fe): ≤0.40% ‌
‌Silicon (Si): ≤0.30% ‌
Impurity control
The impurity content is controlled within the range of 0.01%-0.1%, ensuring the stability of the material quality ‌
The above data is based on industrial standards and complies with the requirements of conventional aluminum alloy processing

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Shiyu Metal Material Technology Co., Ltd. is a collection of procurement, processing, agent, sales, logistics, warehousing in one of the enterprises, the company has a large-scale spot supply base in China, with domestic and foreign large steel mills and suppliers to maintain good relations of cooperation, with a full range of multi-channel procurement resources.
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The company has ISO9001 quality certification, the company's product standards include: the United States (UNS) ASTM /ASME, AMS, German DIN/EN, Japan (SUS) JIS and other standards supply, provide the original material certificate. We can supply according to the standards and technical requirements provided by customers to ensure that the goods and specifications are complete to meet the needs of various merchants. From raw materials to finished products, all go through three quality inspection to ensure the qualified rate of finished products. Shiyu Metal strives for perfection in every detail to ensure that the quality of products in different countries and regions around the world can meet international standards. Shiyu Metal has established a good strategic cooperative relationship with the world famous steel mills such as HAYNES, ATI, SPECIALMETALS, VDM, OUTOKUMPU, Japan Metallurgy, Nippon Steel, and Datong Special Steel.
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