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Annealed 85-silver 15-nickel vs. Annealed 90-platinum 10-iridium

Both annealed 85-silver 15-nickel and annealed 90-platinum 10-iridium are otherwise unclassified metals. Both are furnished in the annealed condition. There are 14 material properties with values for both materials. Properties with values for just one material (5, 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 annealed 85-silver 15-nickel and the bottom bar is annealed 90-platinum 10-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 88
200
Poisson's Ratio 0.36
0.38
Shear Modulus, GPa 32
74
Tensile Strength: Ultimate (UTS), MPa 260
330

Thermal Properties

Latent Heat of Fusion, J/g 140
100
Melting Completion (Liquidus), °C 870
1830
Specific Heat Capacity, J/kg-K 270
130
Thermal Expansion, µm/m-K 18
8.6

Otherwise Unclassified Properties

Density, g/cm3 10
22

Common Calculations

Stiffness to Weight: Axial, points 4.8
5.3
Stiffness to Weight: Bending, points 14
9.1
Strength to Weight: Axial, points 7.1
4.2
Strength to Weight: Bending, points 8.9
4.9
Thermal Shock Resistance, points 12
13

Alloy Composition


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Iridium (Ir), % 0
9.5 to 10.5
Nickel (Ni), % 13.8 to 16
0
Platinum (Pt), % 0
89.3 to 90.5
Silver (Ag), % 84 to 86
0
Residuals, % 0 to 0.2
0 to 0.2