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C74000 Nickel Silver vs. 85-platinum 15-iridium

C74000 nickel silver belongs to the copper alloys classification, while 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (8, 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 C74000 nickel silver and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
220
Poisson's Ratio 0.32
0.38
Shear Modulus, GPa 44
81
Tensile Strength: Ultimate (UTS), MPa 380 to 590
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 200
110
Melting Completion (Liquidus), °C 990
1820
Melting Onset (Solidus), °C 950
1790
Specific Heat Capacity, J/kg-K 390
130
Thermal Expansion, µm/m-K 18
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 42
2.6

Otherwise Unclassified Properties

Density, g/cm3 8.5
22

Common Calculations

Stiffness to Weight: Axial, points 7.7
5.7
Stiffness to Weight: Bending, points 19
9.3
Strength to Weight: Axial, points 13 to 19
7.1 to 9.3
Strength to Weight: Bending, points 14 to 18
6.9 to 8.3
Thermal Shock Resistance, points 13 to 19
21 to 28

Alloy Composition

Copper (Cu), % 69 to 73.5
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 0 to 0.25
0
Lead (Pb), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0
Nickel (Ni), % 9.0 to 11
0
Platinum (Pt), % 0
84.3 to 85.5
Zinc (Zn), % 14.2 to 22
0
Residuals, % 0
0 to 0.2