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AWS BAu-2 vs. ZA-27

AWS BAu-2 belongs to the otherwise unclassified metals classification, while ZA-27 belongs to the zinc alloys. There are 15 material properties with values for both materials. Properties with values for just one material (22, 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 AWS BAu-2 and the bottom bar is ZA-27.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
78
Poisson's Ratio 0.4
0.27
Shear Modulus, GPa 36
31
Tensile Strength: Ultimate (UTS), MPa 150
400 to 430

Thermal Properties

Latent Heat of Fusion, J/g 92
130
Melting Completion (Liquidus), °C 890
480
Melting Onset (Solidus), °C 890
380
Specific Heat Capacity, J/kg-K 180
530
Thermal Expansion, µm/m-K 15
26

Otherwise Unclassified Properties

Density, g/cm3 17
5.0

Common Calculations

Stiffness to Weight: Axial, points 3.3
8.6
Stiffness to Weight: Bending, points 9.1
28
Strength to Weight: Axial, points 2.4
22 to 24
Strength to Weight: Bending, points 3.6
24 to 25
Thermal Shock Resistance, points 7.1
14 to 15

Alloy Composition

Aluminum (Al), % 0
25 to 28
Cadmium (Cd), % 0
0 to 0.0060
Copper (Cu), % 19.4 to 20.5
2.0 to 2.5
Gold (Au), % 79.5 to 80.5
0
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.010 to 0.020
Nickel (Ni), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.080
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
69.3 to 73
Residuals, % 0 to 0.15
0