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AWS E312 vs. 85-platinum 15-iridium

AWS E312 belongs to the iron alloys classification, while 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (8, 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 AWS E312 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, % 25
5.5 to 34
Poisson's Ratio 0.27
0.38
Shear Modulus, GPa 80
81
Tensile Strength: Ultimate (UTS), MPa 740
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 310
110
Melting Completion (Liquidus), °C 1410
1820
Melting Onset (Solidus), °C 1360
1790
Specific Heat Capacity, J/kg-K 480
130
Thermal Expansion, µm/m-K 15
8.4

Otherwise Unclassified Properties

Density, g/cm3 7.7
22

Common Calculations

Stiffness to Weight: Axial, points 15
5.7
Stiffness to Weight: Bending, points 25
9.3
Strength to Weight: Axial, points 27
7.1 to 9.3
Strength to Weight: Bending, points 24
6.9 to 8.3
Thermal Shock Resistance, points 18
21 to 28

Alloy Composition


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Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 28 to 32
0
Copper (Cu), % 0 to 0.75
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 52.3 to 63.5
0
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 8.0 to 10.5
0
Phosphorus (P), % 0 to 0.040
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.2