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EN 1.4826 Stainless Steel vs. 85-platinum 15-iridium

EN 1.4826 stainless steel belongs to the iron alloys classification, while 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (15, 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 1.4826 stainless steel and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 9.1
5.5 to 34
Poisson's Ratio 0.28
0.38
Shear Modulus, GPa 77
81
Tensile Strength: Ultimate (UTS), MPa 500
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 310
110
Melting Completion (Liquidus), °C 1400
1820
Melting Onset (Solidus), °C 1360
1790
Specific Heat Capacity, J/kg-K 490
130
Thermal Expansion, µm/m-K 16
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.6

Otherwise Unclassified Properties

Density, g/cm3 7.7
22

Common Calculations

Stiffness to Weight: Axial, points 14
5.7
Stiffness to Weight: Bending, points 25
9.3
Strength to Weight: Axial, points 18
7.1 to 9.3
Strength to Weight: Bending, points 18
6.9 to 8.3
Thermal Shock Resistance, points 11
21 to 28

Alloy Composition


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Carbon (C), % 0.3 to 0.5
0
Chromium (Cr), % 21 to 23
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 60.4 to 68.7
0
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 9.0 to 11
0
Phosphorus (P), % 0 to 0.040
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 1.0 to 2.5
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.2