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85-platinum 15-iridium vs. SAE-AISI T6 Steel

85-platinum 15-iridium belongs to the otherwise unclassified metals classification, while SAE-AISI T6 steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (11, 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 T6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Poisson's Ratio 0.38
0.29
Shear Modulus, GPa 81
81
Tensile Strength: Ultimate (UTS), MPa 560 to 730
880 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 110
250
Melting Completion (Liquidus), °C 1820
1830
Melting Onset (Solidus), °C 1790
1770
Specific Heat Capacity, J/kg-K 130
400
Thermal Expansion, µm/m-K 8.4
12

Otherwise Unclassified Properties

Density, g/cm3 22
9.5

Common Calculations

Stiffness to Weight: Axial, points 5.7
12
Stiffness to Weight: Bending, points 9.3
21
Strength to Weight: Axial, points 7.1 to 9.3
26 to 63
Strength to Weight: Bending, points 6.9 to 8.3
21 to 39
Thermal Shock Resistance, points 21 to 28
26 to 64

Alloy Composition

Carbon (C), % 0
0.75 to 0.85
Chromium (Cr), % 0
4.0 to 4.8
Cobalt (Co), % 0
11 to 13
Copper (Cu), % 0
0 to 0.25
Iridium (Ir), % 14.5 to 15.5
0
Iron (Fe), % 0
55.9 to 63.5
Manganese (Mn), % 0
0.2 to 0.4
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Platinum (Pt), % 84.3 to 85.5
0
Silicon (Si), % 0
0.2 to 0.4
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
18.5 to 21
Vanadium (V), % 0
1.5 to 2.1
Residuals, % 0 to 0.2
0

Comparable Variants