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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 is achieved through heat treatment, providing the alloy with high hardness and durability. These properties make 7178 T6511 an ideal choice for high-performance applications, particularly in the aerospace, automotive, defense, and other demanding sectors. Additionally, 7178 T6511 is suitable for anodizing, which improves surface appearance and enhances corrosion resistance, ensuring long-lasting performance in harsh environments such as outdoor and marine applications.
The weldability of 7178 T6511 is good when appropriate welding techniques are used. However, due to its high hardness and strength, welding requires care and expertise. In terms of bending, 7178 T6511 presents challenges due to its increased hardness. Although the alloy can be formed with suitable equipment and techniques, bending operations should be performed with more caution compared to more ductile alloys.
Regarding corrosion resistance, 7178 T6511 performs exceptionally well in harsh environments such as seawater. Therefore, it is ideal for marine, exterior structures, and other corrosion-sensitive applications. It is also suitable for high-vibration environments, which provides advantages in aerospace, automotive, and defense industries. Its high durability and long-lasting performance increase the reliability of 7178 T6511 in these demanding applications.
The advantages of 7178 T6511 aluminum alloy include high mechanical strength, corrosion resistance, compatibility with anodizing, weldability, and suitability for high-vibration environments. However, its high hardness and strength can pose challenges during welding and bending processes. Additionally, this alloy may not be as easily machinable as more ductile alloys. Despite these challenges, 7178 T6511 is an excellent choice for industrial applications requiring high performance and durability.
7178 T6511 can be supplied according to the following standards:
• 7178 T6511 Cold Drawn Round Bar; UNS A97178, ASTM B211, ISO AlZn7MgCu, QQ-A-430
• 7178 T6511 Cold Drawn Plate; UNS A97178, ASTM B211, ISO AlZn7MgCu, QQ-A-430
• 7178 T6511 Cold Drawn Wire; UNS A97178, ASTM B211, ISO AlZn7MgCu, QQ-A-430
• 7178 T6511 Cold Drawn Tube; UNS A97178, ASTM B211, ISO AlZn7MgCu, QQ-A-430
• 7178 T6511 Extruded Profile; AMS QQ-A-200/13, ASTM B221, SAE J454, UNS A97178, ISO AlZn7MgCu
Selection Factors for 7178 T6511
- Strength: Excellent
- Machinability: Poor
- Weldability: Medium
- Formability: Medium
- Corrosion Resistance: Medium
- Heat Treatable: Yes
Some Known Applications of 7178 T6511
Used in brake pads in the automotive industry,
Also used in the aerospace sector,
And in the construction industry.
- Tube/Profile
- Round/Flat Rod
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