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Grade 702C Zirconium vs. 85-platinum 15-iridium

Both grade 702C zirconium and 85-platinum 15-iridium are otherwise unclassified metals. There are 14 material properties with values for both materials. Properties with values for just one material (13, 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 grade 702C zirconium and the bottom bar is 85-platinum 15-iridium.

Grade 702C Cast Zirconium85-Platinum 15-Iridium Electrical Contact Alloy
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 97
220
Elongation at Break, % 13
5.5 to 34
Poisson's Ratio 0.34
0.38
Shear Modulus, GPa 36
81
Tensile Strength: Ultimate (UTS), MPa 430
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 250
110
Specific Heat Capacity, J/kg-K 270
130
Thermal Expansion, µm/m-K 5.7
8.4

Otherwise Unclassified Properties

Density, g/cm3 6.7
22

Common Calculations

Stiffness to Weight: Axial, points 8.1
5.7
Stiffness to Weight: Bending, points 23
9.3
Strength to Weight: Axial, points 18
7.1 to 9.3
Strength to Weight: Bending, points 19
6.9 to 8.3
Thermal Shock Resistance, points 55
21 to 28

Alloy Composition


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Carbon (C), % 0 to 0.1
0
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 0 to 0.3
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.010
0
Platinum (Pt), % 0
84.3 to 85.5
Zirconium (Zr), % 94.8 to 100
0
Residuals, % 0
0 to 0.2