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90-platinum 10-iridium vs. EN-MC21210 Magnesium

90-platinum 10-iridium belongs to the otherwise unclassified metals classification, while EN-MC21210 magnesium belongs to the magnesium alloys. There are 15 material properties with values for both materials. Properties with values for just one material (16, 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 90-platinum 10-iridium and the bottom bar is EN-MC21210 magnesium.

90-Platinum 10-Iridium Electrical Contact AlloyEN-MC21210 (MgAl2Mn) Magnesium
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 5.5 to 34
14
Poisson's Ratio 0.38
0.29
Shear Modulus, GPa 74
17
Shear Strength, MPa 220 to 320
110
Tensile Strength: Ultimate (UTS), MPa 330 to 550
190

Thermal Properties

Latent Heat of Fusion, J/g 100
350
Specific Heat Capacity, J/kg-K 130
1000
Thermal Expansion, µm/m-K 8.6
27

Otherwise Unclassified Properties

Density, g/cm3 22
1.6

Common Calculations

Stiffness to Weight: Axial, points 5.3
15
Stiffness to Weight: Bending, points 9.1
72
Strength to Weight: Axial, points 4.2 to 7.1
32
Strength to Weight: Bending, points 4.9 to 6.9
44
Thermal Shock Resistance, points 13 to 22
11

Alloy Composition

Aluminum (Al), % 0
1.6 to 2.6
Copper (Cu), % 0
0 to 0.010
Iridium (Ir), % 9.5 to 10.5
0
Iron (Fe), % 0
0 to 0.0050
Magnesium (Mg), % 0
96.3 to 98.3
Manganese (Mn), % 0
0.1 to 0.7
Nickel (Ni), % 0
0 to 0.0020
Platinum (Pt), % 89.3 to 90.5
0
Silicon (Si), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.010