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EN 1.7380 Steel vs. 90-platinum 10-iridium

EN 1.7380 steel 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 EN 1.7380 steel 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, % 19 to 20
5.5 to 34
Poisson's Ratio 0.29
0.38
Shear Modulus, GPa 74
74
Shear Strength, MPa 330 to 350
220 to 320
Tensile Strength: Ultimate (UTS), MPa 540 to 550
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 7.9
22

Common Calculations

Stiffness to Weight: Axial, points 13
5.3
Stiffness to Weight: Bending, points 24
9.1
Strength to Weight: Axial, points 19 to 20
4.2 to 7.1
Strength to Weight: Bending, points 19
4.9 to 6.9
Thermal Shock Resistance, points 15 to 16
13 to 22

Alloy Composition


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Carbon (C), % 0.080 to 0.14
0
Chromium (Cr), % 2.0 to 2.5
0
Copper (Cu), % 0 to 0.3
0
Iridium (Ir), % 0
9.5 to 10.5
Iron (Fe), % 94.6 to 96.6
0
Manganese (Mn), % 0.4 to 0.8
0
Molybdenum (Mo), % 0.9 to 1.1
0
Nitrogen (N), % 0 to 0.012
0
Phosphorus (P), % 0 to 0.020
0
Platinum (Pt), % 0
89.3 to 90.5
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.010
0
Residuals, % 0
0 to 0.2