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7178 Aluminum vs. 70Ag-30Ni Alloy

7178 aluminum belongs to the aluminum alloys classification, while 70Ag-30Ni alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (13, 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 70Ag-30Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
100
Poisson's Ratio 0.32
0.35
Shear Modulus, GPa 27
39
Tensile Strength: Ultimate (UTS), MPa 240 to 640
320 to 530

Thermal Properties

Latent Heat of Fusion, J/g 370
170
Melting Completion (Liquidus), °C 630
960
Melting Onset (Solidus), °C 480
960
Specific Heat Capacity, J/kg-K 860
300
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
69
Electrical Conductivity: Equal Weight (Specific), % IACS 91
62

Otherwise Unclassified Properties

Density, g/cm3 3.1
10

Common Calculations

Stiffness to Weight: Axial, points 13
5.8
Stiffness to Weight: Bending, points 45
16
Strength to Weight: Axial, points 21 to 58
8.8 to 15
Strength to Weight: Bending, points 28 to 54
10 to 15
Thermal Shock Resistance, points 10 to 28
13 to 21

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
0
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0
Nickel (Ni), % 0
28.8 to 31
Silicon (Si), % 0 to 0.4
0
Silver (Ag), % 0
69 to 71
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0
0 to 0.2

Comparable Variants