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   2xx.0 or x2xx.0
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   4xx.0 or x4xx.0
   5xx.0 or x5xx.0
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AA 7178
Category Aluminum Alloy
Class Wrought

Composition
ElementWeight %
Al  88.1 
Cu  2.0 
Mg  2.7 
Cr  0.26 
Zn  6.8 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 2.82 25  
Poisson's Ratio 0.33 25  
Elastic Modulus (GPa) 70-80 25  

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 23.4  20-100  
Glossary
STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Salary Expectation

8 things to know about the interview question "What's your salary expectation"?

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.