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AWS BAu-1 vs. ASTM B685 Alloy

Both AWS BAu-1 and ASTM B685 alloy are otherwise unclassified metals. They have 40% of their average alloy composition in common. There are 15 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AWS BAu-1 and the bottom bar is ASTM B685 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Poisson's Ratio 0.37
0.37
Shear Modulus, GPa 40
43
Tensile Strength: Ultimate (UTS), MPa 210
660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 150
180
Melting Completion (Liquidus), °C 1020
1230
Melting Onset (Solidus), °C 990
1200
Specific Heat Capacity, J/kg-K 290
300
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Density, g/cm3 13
11

Common Calculations

Stiffness to Weight: Axial, points 4.7
6.1
Stiffness to Weight: Bending, points 12
15
Strength to Weight: Axial, points 4.5
17 to 27
Strength to Weight: Bending, points 6.1
16 to 21
Thermal Shock Resistance, points 8.5
28 to 46

Alloy Composition


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Aluminum (Al), % 0
0 to 0.0050
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 61.9 to 63
39.5 to 40.5
Gold (Au), % 37 to 38
0
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Palladium (Pd), % 0
59 to 60.5
Silver (Ag), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.060
Residuals, % 0 to 0.15
0 to 0.2