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AWS BAg-20 vs. AWS BAu-4

Both AWS BAg-20 and AWS BAu-4 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. There are 16 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-20 and the bottom bar is AWS BAu-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 93
110
Poisson's Ratio 0.32
0.4
Shear Modulus, GPa 35
41
Tensile Strength: Ultimate (UTS), MPa 160
200

Thermal Properties

Brazing Temperature, °C 770 to 900
950 to 1000
Latent Heat of Fusion, J/g 150
100
Melting Completion (Liquidus), °C 770
950
Melting Onset (Solidus), °C 680
950
Specific Heat Capacity, J/kg-K 340
190
Thermal Expansion, µm/m-K 21
14

Otherwise Unclassified Properties

Density, g/cm3 8.6
17

Common Calculations

Stiffness to Weight: Axial, points 6.0
3.6
Stiffness to Weight: Bending, points 17
9.3
Strength to Weight: Axial, points 5.1
3.2
Strength to Weight: Bending, points 7.6
4.4
Thermal Shock Resistance, points 5.9
9.2

Alloy Composition

Copper (Cu), % 37 to 39
0
Gold (Au), % 0
81.5 to 82.5
Nickel (Ni), % 0
17.4 to 18.5
Silver (Ag), % 29 to 31
0
Zinc (Zn), % 30 to 34
0
Residuals, % 0
0 to 0.15