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Aug 21, 2026
8:12 AM
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7075-T73 aluminum is a high-strength aluminum alloy made for situations where strength is important, but long-term reliability matters even more. It belongs to the 7000 series, with zinc as its main alloying element, along with magnesium and copper. The T73 temper gives this alloy better resistance to stress-corrosion cracking than the popular T6 temper.
For aerospace, military, tooling, and other demanding applications, this small trade-off in strength can make a big difference. Premium Alu supplies 7075-T73 aluminum in different shapes, sizes, and finishes to meet specific project needs.
What Is 7075-T73 Aluminum?
7075-T73 is produced through a special heat-treatment and aging process. The alloy is intentionally overaged to improve its resistance to stress-corrosion cracking and increase fracture toughness.
Compared with 7075-T6, T73 has lower strength. However, it performs better when a component must handle moisture, corrosive conditions, repeated loads, or long service periods. Typical tensile strength for 7075-T73 is around 505 MPa, compared with approximately 572 MPa for 7075-T6, depending on the product form and applicable specification.
This makes T73 a practical choice when maximum strength is not the only concern.
7075-T73 vs 7075-T6
The right temper depends on how the aluminum will be used. 7075-T6 is a good option when maximum strength is the main goal and the working environment is well controlled. T73 is generally preferred when corrosion resistance, toughness, and long-term service are higher priorities.
For aircraft structures and other components exposed to demanding outdoor conditions, T73 can offer greater peace of mind. Engineers often choose it because avoiding stress-corrosion problems is more important than gaining a little extra tensile strength.
Main Applications of 7075-T73 Aluminum
Aerospace is one of the most important industries using this material. Common applications include aircraft structural parts, wing components, fuselage structures, landing gear parts, and helicopter components.
The alloy is also useful in military equipment, transportation components, sporting equipment, and precision tooling. 7075 T73 aluminum for mold making can be considered when a mold requires high strength, good dimensional stability, and dependable performance. The exact temper and product form should always be selected according to the mold's temperature, loading, machining, and service requirements.
7075 Aluminum Machinability
One reason 7075 alloys are popular with manufacturers is their good machinability. 7075 aluminum machinability is generally favorable when the correct cutting tools, speeds, feeds, and cooling methods are used.
Sharp carbide tools can help produce clean surfaces and accurate dimensions. Proper machining conditions also reduce heat buildup and the chance of surface problems. Although T73 machines similarly to other 7075 tempers, each job should be tested and adjusted based on the machine, tooling, part size, and desired finish.
Welding is normally avoided with 7075-T73 because the heat-affected area can lose strength and become more vulnerable to cracking. Bolting, riveting, and other mechanical joining methods are usually preferred.
Available Forms and Standards
7075-T73 aluminum is commonly supplied as plate, sheet, bar, rod, and tube. Typical standards include ASTM B209 for plate and sheet, ASTM B211 for bar and rod, and ASTM B210 or B241 for tube.
The material can also be supplied in customized dimensions and surface finishes. Availability depends on size, quantity, specification, and processing requirements.
Understanding 7075 Aluminum Price Per Kg
The 7075 aluminum price per kg can vary considerably. Alloy temper, thickness, product form, order quantity, machining, surface treatment, certification, and shipping requirements can all affect the final price.
For this reason, buyers should compare complete quotations rather than looking only at the basic material rate. A lower initial price may not include testing, cutting, finishing, packaging, or transportation.
Why Choose Premium Alu?
Premium Alu provides 7075-T73 aluminum for customers who need a balance of strength, toughness, and corrosion resistance. Products can be supplied in different forms and customized to suit project requirements. Lead times commonly range from 10 to 60 days, depending on dimensions, quantity, temper, and processing.
Whether you need aerospace material, industrial components, or 7075 T73 aluminum for mold making, choosing the correct specification is essential. Contact Premium Alu with your required size, quantity, temper, and application details to discuss a suitable aluminum solution.
FAQ
Is 7075-T73 stronger than 6061-T6?
Yes. 7075-T73 generally has considerably higher tensile strength than 6061-T6, although 6061 is easier to weld and usually more corrosion resistant.
Can 7075-T73 be welded?
Welding is generally not recommended because the heat-affected zone can lose strength and become more susceptible to cracking.
What is 7075-T73 mainly used for?
It is widely used in aerospace structures, military equipment, tooling, transportation parts, and other applications where strength and resistance to stress-corrosion cracking are important.
How can I get a 7075 aluminum price per kg?
The best approach is to request a quotation based on alloy temper, product form, dimensions, quantity, certification, and finishing requirements. Premium Alu can provide pricing based on your specific specifications.
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