7178

EN AW / AlZn7MgCu / 7178 / T7651

化学性质 % 值
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
物理特性
Density2,83 g/cm³
Melting Point477 °C
Thermal Expansion23.5 µm/m°C
Modulus of Elasticity71 GPa
Thermal Conductivity140 W/m.K
Electrical Resistivity40 % IACS
机械性能
Proof Strength503 MPa
Yield Strength572 MPa
Shear Strength340 MPa
Elongation A50 mm%10
Hardness135 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.

 

ALLOY DESIGNATIONS
 
7178 T7651 has the following standard designations and specifications.

As Plate/Sheet; 7178 T7651, ASTM B209ISO 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.

 

SUPPLIED FORMS
 
7178 T7651 is produced/supplied in plate/sheet forms.
  • Plate
  • Sheet
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