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AWS BAu-6 vs. ASTM B522 Class II

Both AWS BAu-6 and ASTM B522 class II are otherwise unclassified metals. They have 69% of their average alloy composition in common. There are 15 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is AWS BAu-6 and the bottom bar is ASTM B522 class II.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
96
Poisson's Ratio 0.39
0.41
Shear Modulus, GPa 43
34
Tensile Strength: Ultimate (UTS), MPa 190
280 to 490

Thermal Properties

Latent Heat of Fusion, J/g 120
77
Melting Completion (Liquidus), °C 1050
1030
Melting Onset (Solidus), °C 1010
1030
Specific Heat Capacity, J/kg-K 210
160
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Density, g/cm3 16
17

Common Calculations

Stiffness to Weight: Axial, points 4.0
3.1
Stiffness to Weight: Bending, points 10
8.9
Strength to Weight: Axial, points 3.2
4.4 to 7.8
Strength to Weight: Bending, points 4.5
5.5 to 8.0
Thermal Shock Resistance, points 8.5
13 to 24

Alloy Composition


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Gold (Au), % 69.5 to 70.5
68.5 to 69.5
Nickel (Ni), % 21.5 to 22.5
0
Palladium (Pd), % 7.5 to 8.5
0
Platinum (Pt), % 0
5.5 to 6.5
Silver (Ag), % 0
24.5 to 25.5
Sulfur (S), % 0
0 to 0.010
Residuals, % 0 to 0.15
0 to 0.26