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Grade 200 Maraging Steel vs. 85-platinum 15-iridium

Grade 200 maraging steel 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 (12, 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 grade 200 maraging 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, % 9.1 to 18
5.5 to 34
Poisson's Ratio 0.3
0.38
Shear Modulus, GPa 74
81
Shear Strength, MPa 600 to 890
370 to 420
Tensile Strength: Ultimate (UTS), MPa 970 to 1500
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 260
110
Melting Completion (Liquidus), °C 1460
1820
Melting Onset (Solidus), °C 1420
1790
Specific Heat Capacity, J/kg-K 460
130
Thermal Expansion, µm/m-K 12
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 33 to 51
7.1 to 9.3
Strength to Weight: Bending, points 27 to 35
6.9 to 8.3
Thermal Shock Resistance, points 29 to 45
21 to 28

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0
Boron (B), % 0 to 0.0030
0
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0
Cobalt (Co), % 8.0 to 9.0
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 67.8 to 71.8
0
Manganese (Mn), % 0 to 0.1
0
Molybdenum (Mo), % 3.0 to 3.5
0
Nickel (Ni), % 17 to 19
0
Phosphorus (P), % 0 to 0.010
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.15 to 0.25
0
Zirconium (Zr), % 0 to 0.020
0
Residuals, % 0
0 to 0.2

Comparable Variants