AS 9100
SPACE 2009
AS 9120
7178
EN AW / AlZn7MgCu / 7178 / T7651
| 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 | 477 °C |
| Thermal Expansion | 23.5 µm/m°C |
| Modulus of Elasticity | 71 GPa |
| Thermal Conductivity | 140 W/m.K |
| Electrical Resistivity | 40 % IACS |
| Mechanical Properties | Value |
| Proof Strength | 503 MPa |
| Yield Strength | 572 MPa |
| Shear Strength | 340 MPa |
| Elongation A50 mm | %10 |
| Hardness | 135 HB |
The 7178 T7651 aluminum alloy is known for its high strength, excellent corrosion resistance, and good machinability. The T7651 temper represents a heat-treated form of the alloy, which gives it extremely high durability and hardness. These properties make 7178 T7651 ideal for use in aerospace, space, defense, and other high-performance applications. Additionally, 7178 T7651 aluminum is suitable for anodizing, which enhances its surface appearance while improving its corrosion resistance, making it perfect for long-term outdoor use.
In terms of weldability, 7178 T7651 aluminum alloy can be welded, but its high strength and durability require careful attention during the welding process. Strong and reliable welds can be achieved with proper welding techniques and heat treatment. Regarding bending, 7178 T7651 is more difficult to bend due to its high hardness, but it can still be shaped with appropriate machinery and techniques, making it suitable for structural applications.
The corrosion resistance of 7178 T7651 is outstanding, particularly in atmospheric conditions, and it offers excellent resistance to corrosive environments such as seawater. This makes it ideal for use in maritime and outdoor structural applications. Additionally, 7178 T7651 aluminum alloy can be used in high-vibration environments, making it advantageous in industries such as automotive, aerospace, and defense. Its high durability and long-lasting performance further enhance its reliability in these dynamic applications.
The advantages of 7178 T7651 aluminum alloy include high mechanical strength, corrosion resistance, anodizing compatibility, weldability, and suitability for high-vibration environments. However, its high hardness requires careful handling during bending and welding processes. Additionally, this alloy may not be as easy to machine as more flexible alloys. Despite these challenges, 7178 T7651 is an excellent choice for industrial applications requiring high performance and durability.
As Plate/Sheet; 7178 T7651, ASTM B209, ISO AlZn7MgCu, UNS A97178, AMS QQ-A-250/14
Choosing Factors for 7178 T7651
- Strength: Excellent
- Machining: Low
- Weldability: Mediocre
- Formability: Okay
- Corrosion Resistance: Okay
- Heat Treating: Yes
Some Well-Known Applications for 7178 T7651
It is used in high strength fasteners in the aerospace industry,
It is also used in the skins of aircraft wings,
It is also used in the construction industry.
- Plate
- Sheet
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