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AWS BAu-2 vs. AWS ER80S-B3L

AWS BAu-2 belongs to the otherwise unclassified metals classification, while AWS ER80S-B3L belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (14, 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 AWS ER80S-B3L.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 36
74
Tensile Strength: Ultimate (UTS), MPa 150
630

Thermal Properties

Latent Heat of Fusion, J/g 92
260
Melting Completion (Liquidus), °C 890
1460
Melting Onset (Solidus), °C 890
1420
Specific Heat Capacity, J/kg-K 180
470
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Density, g/cm3 17
7.8

Common Calculations

Stiffness to Weight: Axial, points 3.3
13
Stiffness to Weight: Bending, points 9.1
24
Strength to Weight: Axial, points 2.4
22
Strength to Weight: Bending, points 3.6
21
Thermal Shock Resistance, points 7.1
18

Alloy Composition


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Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
2.3 to 2.7
Copper (Cu), % 19.4 to 20.5
0 to 0.35
Gold (Au), % 79.5 to 80.5
0
Iron (Fe), % 0
93.6 to 96
Manganese (Mn), % 0
0.4 to 0.7
Molybdenum (Mo), % 0
0.9 to 1.2
Nickel (Ni), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0.4 to 0.7
Sulfur (S), % 0
0 to 0.025
Residuals, % 0 to 0.15
0 to 0.5