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SAE-AISI 1536 Steel vs. 85-platinum 15-iridium

SAE-AISI 1536 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 (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 SAE-AISI 1536 steel 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, % 14 to 18
5.5 to 34
Poisson's Ratio 0.29
0.38
Shear Modulus, GPa 73
81
Shear Strength, MPa 400 to 440
370 to 420
Tensile Strength: Ultimate (UTS), MPa 640 to 720
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 250
110
Melting Completion (Liquidus), °C 1460
1820
Melting Onset (Solidus), °C 1420
1790
Specific Heat Capacity, J/kg-K 470
130
Thermal Expansion, µm/m-K 12
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.6

Otherwise Unclassified Properties

Density, g/cm3 7.8
22

Common Calculations

Stiffness to Weight: Axial, points 13
5.7
Stiffness to Weight: Bending, points 24
9.3
Strength to Weight: Axial, points 23 to 25
7.1 to 9.3
Strength to Weight: Bending, points 21 to 23
6.9 to 8.3
Thermal Shock Resistance, points 20 to 23
21 to 28

Alloy Composition

Carbon (C), % 0.3 to 0.37
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 98 to 98.5
0
Manganese (Mn), % 1.2 to 1.5
0
Phosphorus (P), % 0 to 0.040
0
Platinum (Pt), % 0
84.3 to 85.5
Sulfur (S), % 0 to 0.050
0
Residuals, % 0
0 to 0.2

Comparable Variants