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AS 9120
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7178
ASTM B221 / AlZn7MgCu / 7178 / T6511
| Chemical Properties | % Value |
| Silicon (Si) | 0,00 - 0,40 |
| Chromium (Cr) | 0,18 - 0,28 |
| Manganese (Mn) | 0,00 - 0,30 |
| Magnesium (Mg) | 2,40 - 3,10 |
| Copper (Cu) | 1,60 - 2,40 |
| Titanium (Ti) | 0,00 - 0,20 |
| Iron (Fe) | 0,00 - 0,50 |
| Zinc (Zn) | 6,30 - 7,30 |
| Aluminium (Al) | Balance |
| Physical Properties | Value |
| Density | 2,83 g/cm³ |
| Melting Point | 479 °C |
| Thermal Expansion | 23.5 x 10^-6 /K |
| Modulus of Elasticity | 71 GPa |
| Thermal Conductivity | 130 W/m.K |
| Electrical Resistivity | 31% IACS |
| Mechanical Properties | Value |
| Proof Strength | 560 MPa |
| Yield Strength | 630 MPa |
| Shear Strength | 370 MPa |
| Elongation A50 mm | 5% |
| Hardness | 160 HB |
The 7178 T6511 aluminum alloy is known for its high mechanical strength, good corrosion resistance, and excellent machinability. The T6511 temper, achieved through heat treatment, provides the alloy with high hardness and durability. These properties make 7178 T6511 ideal for high-performance applications, particularly in industries such as aerospace, automotive, defense, and other demanding fields. Additionally, 7178 T6511 is suitable for anodizing, which enhances its surface appearance while increasing corrosion resistance, making it perfect for long-lasting performance in harsh environments such as outdoor and maritime applications.
The weldability of 7178 T6511 is good when proper welding techniques are used. However, due to its high hardness and strength, welding requires careful attention and expertise. In terms of bending, 7178 T6511 presents challenges due to its higher hardness. While the alloy can still be shaped with the right machinery and techniques, the bending process requires more careful handling compared to more flexible alloys.
In terms of corrosion resistance, 7178 T6511 performs exceptionally well, especially in harsh environments such as seawater. This makes it ideal for maritime, outdoor structures, and other corrosion-prone applications. Additionally, 7178 T6511 is suitable for use in high-vibration environments, making it advantageous for industries such as aerospace, automotive, and defense. Its high durability and long-lasting performance enhance the reliability of 7178 T6511 in these demanding applications.
The advantages of 7178 T6511 aluminum alloy include high mechanical strength, corrosion resistance, anodizing compatibility, weldability, and suitability for high-vibration environments. However, its high hardness and strength can create challenges during welding and bending processes. Additionally, this alloy may not be as easy to machine as more flexible alloys. Despite these challenges, 7178 T6511 is an excellent choice for industrial applications requiring high performance and durability.
As Cold Drawn Round/Flat Bar and Tube; 7178 T6511, UNS A97178, ASTM B211, ISO AlZn7MgCu, QQ-A-430
As Extruded Profile; 7178 T6511, AMS QQ-A-200/13, ASTM B221, SAE J454, UNS A97178, ISO AlZn7MgCu
Choosing Factors for 7178 T6511
- Strength: Excellent
- Machining: Poor
- Weldability: Average
- Formability: Okay
- Corrosion Resistance: Okay
- Heat Treating: Yes
Some Well-Known Applications for 7178 T6511
It is used in brake pads in the automotive industry,
In addition to the aerospace industry,
It is also used in the construction industry.
- Tube/Profile
- Round/Flat Bar
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