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EN 1.3961 Alloy vs. 85-platinum 15-iridium

EN 1.3961 alloy belongs to the iron alloys classification, while 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (9, 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 EN 1.3961 alloy and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 31
5.5 to 34
Poisson's Ratio 0.3
0.38
Shear Modulus, GPa 72
81
Shear Strength, MPa 300
370 to 420
Tensile Strength: Ultimate (UTS), MPa 450
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 270
110
Melting Completion (Liquidus), °C 1430
1820
Melting Onset (Solidus), °C 1390
1790
Specific Heat Capacity, J/kg-K 460
130
Thermal Expansion, µm/m-K 1.3
8.4

Otherwise Unclassified Properties

Density, g/cm3 8.2
22

Common Calculations

Stiffness to Weight: Axial, points 13
5.7
Stiffness to Weight: Bending, points 23
9.3
Strength to Weight: Axial, points 15
7.1 to 9.3
Strength to Weight: Bending, points 16
6.9 to 8.3
Thermal Shock Resistance, points 130
21 to 28

Alloy Composition

Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 0 to 0.25
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 60.7 to 65
0
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 35 to 37
0
Phosphorus (P), % 0 to 0.030
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.020
0
Residuals, % 0
0 to 0.2