Structured Packing,Structured Packing In Distillation Column,Ceramic Structured Packing,Structured Packing Column Ningbo Cijie Chemical Equipment Co., Ltd. , https://www.chemicaltower.com
Aluminum Alloy 7075 is a high-strength aluminum alloy that contains zinc as its primary alloying element. Its composition typically includes around 5.6–6.1% zinc, 2.1–2.5% magnesium, 1.2–1.6% copper, and trace amounts of silicon, iron, manganese, titanium, and chromium. This alloy is available in various tempers, such as 7075-0, 7075-T6, and 7075-T651, each offering different mechanical properties depending on the application.
Known for its excellent strength-to-weight ratio, 7075 aluminum is widely used in aerospace, military, and high-performance structural applications. It provides good ductility, toughness, and fatigue resistance, although it can be more brittle due to microsegregation compared to other alloys. Despite this, it offers superior corrosion resistance than some other aluminum alloys like 2000 series.
The T6 temper of 7075 is achieved through a process involving solution heat treatment, quenching, and artificial aging at 120°C for 24 hours. This results in peak mechanical properties, with an ultimate tensile strength ranging from 510–540 MPa (74,000–78,000 psi) and a yield strength of at least 430–480 MPa (63,000–69,000 psi). The elongation at break is generally between 5–11%.
For the T651 temper, the alloy undergoes additional stress relief, which slightly reduces its elongation but increases its tensile strength. For example, T651 7075 has an ultimate tensile strength of 570 MPa (83,000 psi) and a yield strength of 500 MPa (73,000 psi), with an elongation range of 3–9%. These values may vary based on the thickness and form of the material.
Below is a table summarizing the mechanical properties of 7075 sheets in different tempers:
| Material | Temper | Thickness (in) | Tensile Strength (ksi) | Yield Strength (ksi) | Elongation (%) |
|------------------|------------|----------------|-------------------------|----------------------|----------------|
| Alloy 7075 Sheet | T6 Bare | 0.125 - 0.25 | 78 | 69 | 8 |
| Alloy 7075 Sheet | T651 Bare | 0.25 - 0.50 | 78 | 67 | 9 |
| Alloy 7075 Sheet | T651 Bare | 0.5 - 1.0 | 78 | 68 | 7 |
| Alloy 7075 Sheet | T6 Clad | 0.188 - 0.25 | 75 | 64 | 8 |
| Alloy 7075 Sheet | T651 Clad | 0.25 - 0.50 | 75 | 65 | 9 |
| Alloy 7075 Sheet | T651 Clad | 0.5 - 1.0 | 78 | 68 | 7 |
In terms of physical properties, 7075 aluminum has a nominal density of 0.101 lbs./in³ (2.80 Mg/m³) at 68°F (20°C). Its melting range is between 990°F and 1175°F (532°C to 635°C), and its specific heat capacity is approximately 0.23 BTU/lb-°F (960 J/kg-K).
This alloy is ideal for applications requiring high strength and durability, making it a popular choice in industries where performance and reliability are critical. Whether used in aircraft components or heavy-duty machinery, 7075 aluminum continues to prove its value in demanding environments.