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ASTM B477 Au-Ni-Ag vs. ASTM B540 Palladium

Both ASTM B477 Au-Ni-Ag and ASTM B540 palladium are otherwise unclassified metals. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM B477 Au-Ni-Ag and the bottom bar is ASTM B540 palladium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
110
Elongation at Break, % 5.5 to 11
1.1 to 14
Knoop Hardness 100 to 190
230 to 380
Poisson's Ratio 0.41
0.38
Shear Modulus, GPa 34
39
Shear Strength, MPa 190 to 320
500 to 700
Tensile Strength: Ultimate (UTS), MPa 310 to 550
830 to 1240

Thermal Properties

Latent Heat of Fusion, J/g 80
140
Melting Completion (Liquidus), °C 1010
1220
Melting Onset (Solidus), °C 930
1020
Specific Heat Capacity, J/kg-K 160
240
Thermal Expansion, µm/m-K 15
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
4.9 to 5.5
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
3.5 to 3.9

Otherwise Unclassified Properties

Density, g/cm3 17
13

Common Calculations

Stiffness to Weight: Axial, points 3.1
4.7
Stiffness to Weight: Bending, points 8.9
12
Strength to Weight: Axial, points 5.0 to 9.0
18 to 27
Strength to Weight: Bending, points 6.0 to 8.8
15 to 20
Thermal Shock Resistance, points 16 to 28
41 to 61

Alloy Composition

Copper (Cu), % 0
13.5 to 14.5
Gold (Au), % 74.2 to 75.8
9.5 to 10.5
Nickel (Ni), % 2.6 to 3.4
0
Palladium (Pd), % 0
34 to 36
Platinum (Pt), % 0
9.5 to 10.5
Silver (Ag), % 21.4 to 22.6
29 to 31
Zinc (Zn), % 0
0.8 to 1.2
Residuals, % 0
0 to 0.3