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85-platinum 15-iridium vs. AWS ERNiFeCr-2

85-platinum 15-iridium belongs to the otherwise unclassified metals classification, while AWS ERNiFeCr-2 belongs to the nickel alloys. There are 18 material properties with values for both materials. Properties with values for just one material (7, 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 AWS ERNiFeCr-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 5.5 to 34
28
Poisson's Ratio 0.38
0.29
Shear Modulus, GPa 81
75
Tensile Strength: Ultimate (UTS), MPa 560 to 730
1300

Thermal Properties

Latent Heat of Fusion, J/g 110
310
Melting Completion (Liquidus), °C 1820
1460
Melting Onset (Solidus), °C 1790
1410
Specific Heat Capacity, J/kg-K 130
450
Thermal Expansion, µm/m-K 8.4
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.2
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
1.5

Otherwise Unclassified Properties

Density, g/cm3 22
8.3

Common Calculations

Stiffness to Weight: Axial, points 5.7
13
Stiffness to Weight: Bending, points 9.3
23
Strength to Weight: Axial, points 7.1 to 9.3
43
Strength to Weight: Bending, points 6.9 to 8.3
32
Thermal Shock Resistance, points 21 to 28
38

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.8
Boron (B), % 0
0 to 0.0030
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17 to 21
Copper (Cu), % 0
0 to 0.3
Iridium (Ir), % 14.5 to 15.5
0
Iron (Fe), % 0
11.6 to 24.6
Manganese (Mn), % 0
0 to 0.35
Molybdenum (Mo), % 0
2.8 to 3.3
Nickel (Ni), % 0
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Phosphorus (P), % 0
0 to 0.015
Platinum (Pt), % 84.3 to 85.5
0
Silicon (Si), % 0
0 to 0.35
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0.65 to 1.2
Residuals, % 0
0 to 0.5