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AISI 430FSe Stainless Steel vs. 85-platinum 15-iridium

AISI 430FSe stainless steel belongs to the iron alloys classification, while 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 19 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 AISI 430FSe 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, % 23
5.5 to 34
Poisson's Ratio 0.28
0.38
Shear Modulus, GPa 77
81
Shear Strength, MPa 340
370 to 420
Tensile Strength: Ultimate (UTS), MPa 540
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 280
110
Melting Completion (Liquidus), °C 1440
1820
Melting Onset (Solidus), °C 1390
1790
Specific Heat Capacity, J/kg-K 480
130
Thermal Expansion, µm/m-K 10
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
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 20
7.1 to 9.3
Strength to Weight: Bending, points 19
6.9 to 8.3
Thermal Shock Resistance, points 19
21 to 28

Alloy Composition

Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 16 to 18
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 79.5 to 84
0
Manganese (Mn), % 0 to 1.3
0
Phosphorus (P), % 0 to 0.060
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.060
0
Residuals, % 0
0 to 0.2