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AWS BAu-5 vs. ZA-8

AWS BAu-5 belongs to the otherwise unclassified metals classification, while ZA-8 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-5 and the bottom bar is ZA-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
85 to 86
Poisson's Ratio 0.37
0.26
Shear Modulus, GPa 50
34
Tensile Strength: Ultimate (UTS), MPa 210
210 to 370

Thermal Properties

Latent Heat of Fusion, J/g 180
110
Melting Completion (Liquidus), °C 1170
400
Melting Onset (Solidus), °C 1140
380
Specific Heat Capacity, J/kg-K 280
440
Thermal Expansion, µm/m-K 12
23

Otherwise Unclassified Properties

Density, g/cm3 13
6.3

Common Calculations

Stiffness to Weight: Axial, points 5.8
7.5
Stiffness to Weight: Bending, points 13
23
Strength to Weight: Axial, points 4.5
9.3 to 17
Strength to Weight: Bending, points 6.0
12 to 18
Thermal Shock Resistance, points 9.0
7.6 to 13

Alloy Composition

Aluminum (Al), % 0
8.0 to 8.8
Cadmium (Cd), % 0
0 to 0.0060
Copper (Cu), % 0
0.8 to 1.3
Gold (Au), % 29.5 to 30.5
0
Iron (Fe), % 0
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
Nickel (Ni), % 35.5 to 36.4
0 to 0.020
Palladium (Pd), % 33.5 to 34.5
0
Silicon (Si), % 0
0 to 0.045
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
89.7 to 91.2
Residuals, % 0 to 0.15
0