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85-platinum 15-iridium vs. SAE-AISI P2 Steel

85-platinum 15-iridium belongs to the otherwise unclassified metals classification, while SAE-AISI P2 steel belongs to the iron alloys. 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 85-platinum 15-iridium and the bottom bar is SAE-AISI P2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.38
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 560 to 730
330 to 1980

Thermal Properties

Latent Heat of Fusion, J/g 110
250
Melting Completion (Liquidus), °C 1820
1460
Melting Onset (Solidus), °C 1790
1420
Specific Heat Capacity, J/kg-K 130
470
Thermal Expansion, µm/m-K 8.4
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.3

Otherwise Unclassified Properties

Density, g/cm3 22
7.9

Common Calculations

Stiffness to Weight: Axial, points 5.7
13
Stiffness to Weight: Bending, points 9.3
24
Strength to Weight: Axial, points 7.1 to 9.3
12 to 70
Strength to Weight: Bending, points 6.9 to 8.3
14 to 45
Thermal Shock Resistance, points 21 to 28
11 to 65

Alloy Composition

Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
0.75 to 1.3
Copper (Cu), % 0
0 to 0.25
Iridium (Ir), % 14.5 to 15.5
0
Iron (Fe), % 0
96.6 to 98.8
Manganese (Mn), % 0
0.1 to 0.4
Molybdenum (Mo), % 0
0.15 to 0.4
Nickel (Ni), % 0
0.1 to 0.5
Phosphorus (P), % 0
0 to 0.030
Platinum (Pt), % 84.3 to 85.5
0
Silicon (Si), % 0
0.1 to 0.4
Sulfur (S), % 0
0 to 0.030
Residuals, % 0 to 0.2
0

Comparable Variants