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7178 Aluminum vs. AWS BAg-19

7178 aluminum belongs to the aluminum alloys classification, while AWS BAg-19 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 7178 aluminum and the bottom bar is AWS BAg-19.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
74
Poisson's Ratio 0.32
0.37
Shear Modulus, GPa 27
27
Tensile Strength: Ultimate (UTS), MPa 240 to 640
140

Thermal Properties

Latent Heat of Fusion, J/g 370
120
Melting Completion (Liquidus), °C 630
890
Melting Onset (Solidus), °C 480
760
Specific Heat Capacity, J/kg-K 860
250
Thermal Expansion, µm/m-K 23
20

Otherwise Unclassified Properties

Density, g/cm3 3.1
10

Common Calculations

Stiffness to Weight: Axial, points 13
4.0
Stiffness to Weight: Bending, points 45
14
Strength to Weight: Axial, points 21 to 58
3.8
Strength to Weight: Bending, points 28 to 54
5.8
Thermal Shock Resistance, points 10 to 28
6.9

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
6.6 to 7.9
Iron (Fe), % 0 to 0.5
0
Lithium (Li), % 0
0.15 to 0.3
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0
Silicon (Si), % 0 to 0.4
0
Silver (Ag), % 0
92 to 93
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0
0 to 0.15