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ASTM A182 Grade F24 vs. 90-platinum 10-iridium

ASTM A182 grade F24 belongs to the iron alloys classification, while 90-platinum 10-iridium belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (18, 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 ASTM A182 grade F24 and the bottom bar is 90-platinum 10-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 23
5.5 to 34
Poisson's Ratio 0.29
0.38
Shear Modulus, GPa 74
74
Shear Strength, MPa 420
220 to 320
Tensile Strength: Ultimate (UTS), MPa 670
330 to 550

Thermal Properties

Latent Heat of Fusion, J/g 260
100
Specific Heat Capacity, J/kg-K 470
130
Thermal Expansion, µm/m-K 13
8.6

Otherwise Unclassified Properties

Density, g/cm3 7.8
22

Common Calculations

Stiffness to Weight: Axial, points 13
5.3
Stiffness to Weight: Bending, points 24
9.1
Strength to Weight: Axial, points 24
4.2 to 7.1
Strength to Weight: Bending, points 22
4.9 to 6.9
Thermal Shock Resistance, points 19
13 to 22

Alloy Composition


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Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0.0015 to 0.0070
0
Carbon (C), % 0.050 to 0.1
0
Chromium (Cr), % 2.2 to 2.6
0
Iridium (Ir), % 0
9.5 to 10.5
Iron (Fe), % 94.5 to 96.1
0
Manganese (Mn), % 0.3 to 0.7
0
Molybdenum (Mo), % 0.9 to 1.1
0
Nitrogen (N), % 0 to 0.12
0
Phosphorus (P), % 0 to 0.020
0
Platinum (Pt), % 0
89.3 to 90.5
Silicon (Si), % 0.15 to 0.45
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.060 to 0.1
0
Vanadium (V), % 0.2 to 0.3
0
Residuals, % 0
0 to 0.2