Aluminum 7050 Alloy (UNS A97050) – Composition, Properties and Uses
Aluminum 7050 is an alloy that is known for its high strength, excellent stress corrosion cracking resistance, and good exfoliation corrosion resistance. UNS A97050 material is used in a variety of applications ranging from aerospace components to sporting goods. This blog post will take a closer look at the uses, corrosion resistance, heat resistance, heat treatment, machining, and welding of aluminium 7050.
7050 Alloy Composition
| Element | Content (%) |
|---|---|
| Aluminum, Al | 89 |
| Copper, Cu | 2.3 |
| Magnesium, Mg | 2.3 |
| Zinc, Zn | 6.2 |
| Zirconium, Zr | 0.12 |
7050 Alloy Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 2.6-2.8 g/cm3 | 0.0939-0.101 lb/in3 |
| Melting point | 494°C | 920°F |
7050 Alloy Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 515 MPa | 74695 psi |
| Yield strength | 455 MPa | 65992 psi |
| Fatigue strength | 240 MPa | 34809 psi |
| Elastic modulus | 70-80 GPa | 10153-11603 ksi |
| Poisson’s ratio | 0.33 | 0.33 |
| Elongation | 11% | 11% |
7050 Alloy Thermal Properties
| Properties | Conditions | ||
|---|---|---|---|
| T (ºC) | Treatment | ||
| Thermal conductivity | 180 W/mK | 25 | – |
7050 Alloy Equivalent
- AMS 4108
- AMS 4201
- ASTM B247
- ASTM B316
- QQ A-430
7050 Alloy Uses
aluminum 7050 is most commonly used in the aerospace industry due to its high strength-to-weight ratio and excellent fatigue properties. It can also be used in military applications as it is resistant to cracking under stress and high temperatures. Additionally, this material can also be found in sporting goods such as tennis racquets and golf clubs due to its lightweight properties and durability.
Corrosion Resistance
aluminum 7050 has excellent stress corrosion cracking resistance due to its combination of zinc and magnesium content. This makes it ideal for use in environments with high levels of moisture or saltwater exposure. Additionally, it has good exfoliation corrosion resistance, which makes it suitable for use in aircraft landing gear components and other aerospace applications where exfoliation corrosion can be a concern.
Heat Resistance
aluminum 7050 is capable of withstanding very high temperatures without losing strength or becoming brittle. This makes it suitable for use in hot climates or areas where there may be exposure to extreme temperature fluctuations during operation. Additionally, this alloy has good thermal conductivity, so it can quickly dissipate heat away from critical components or areas where heat buildup could be a problem.
Heat Treatment
Aluminium 7050 can be heat treated by either cold working or solution treating followed by age hardening to further increase the strength of the material. Cold working involves subjecting the material to pressure, while solution treating involves heating it up before allowing it to cool slowly over time. Age hardening involves allowing the material to rest at room temperature after solution treatment which allows additional strengthening of the material’s structure over time.
Machining
Machining aluminium 7050 is relatively straightforward thanks to its good machinability rating compared to other alloys with similar strength characteristics. This alloy can be cut using standard cutting tools such as drill bits and taps without any significant difficulty or tool wear issues when machined correctly using appropriate speeds and feeds for the given application requirements. Additionally, this alloy can also easily be welded using standard welding techniques such as TIG welding or MIG welding without any significant difficulty or risk of warping when done properly.
Welding
Welding aluminum 7050 requires special care since this alloy has a higher melting point than other alloys with similar strength characteristics—which increases the risk of warping if not done properly–but is still possible using standard welding techniques such as TIG welding or MIG welding when done correctly with appropriate shielding gases and joint preparation procedures prior to beginning the welding process itself.
Conclusion:
In conclusion, aluminium 7050 is an incredibly versatile material that is widely used in many industries due to its excellent mechanical properties, including high strength-to-weight ratio, excellent stress corrosion cracking resistance, good exfoliation corrosion resistance, excellent thermal conductivity and high-temperature tolerance range, among others making it suitable for use in a variety of different applications ranging from aerospace components through sporting goods products up until military applications requiring extremely resistant materials against harsh conditions like intense temperatures or even saltwater environments making aluminium 7050 one of your best options when looking for materials that meet these requirements. So if you are looking for a reliable metal with great mechanical properties, then look no further than aluminum 7050!
A passionate metal industry expert and blogger. With over 5 years of experience in the field, Palak brings a wealth of knowledge and insight to her writing. Whether discussing the latest trends in the metal industry or sharing tips, she is dedicated to helping others succeed in the metal industry.
