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Annealed 85-platinum 15-iridium vs. Annealed K94200

Annealed 85-platinum 15-iridium belongs to the otherwise unclassified metals classification, while annealed K94200 belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (10, 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-platinum 15-iridium and the bottom bar is annealed K94200.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
140
Elongation at Break, % 34
32
Poisson's Ratio 0.38
0.34
Shear Modulus, GPa 81
54
Shear Strength, MPa 370
330
Tensile Strength: Ultimate (UTS), MPa 560
500

Thermal Properties

Melting Onset (Solidus), °C 1790
1440
Specific Heat Capacity, J/kg-K 130
500
Thermal Expansion, µm/m-K 8.4
5.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.2
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.0

Otherwise Unclassified Properties

Density, g/cm3 22
8.2

Common Calculations

Stiffness to Weight: Axial, points 5.7
9.8
Stiffness to Weight: Bending, points 9.3
21
Strength to Weight: Axial, points 7.1
17
Strength to Weight: Bending, points 6.9
17
Thermal Shock Resistance, points 21
49