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C94700 Bronze vs. 85-platinum 15-iridium

C94700 bronze belongs to the copper alloys classification, while 85-platinum 15-iridium belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (11, 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 C94700 bronze and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 7.9 to 32
5.5 to 34
Poisson's Ratio 0.34
0.38
Shear Modulus, GPa 43
81
Tensile Strength: Ultimate (UTS), MPa 350 to 590
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 200
110
Melting Completion (Liquidus), °C 1030
1820
Melting Onset (Solidus), °C 900
1790
Specific Heat Capacity, J/kg-K 380
130
Thermal Expansion, µm/m-K 17
8.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 12
2.6

Otherwise Unclassified Properties

Density, g/cm3 8.8
22

Common Calculations

Stiffness to Weight: Axial, points 7.3
5.7
Stiffness to Weight: Bending, points 18
9.3
Strength to Weight: Axial, points 11 to 19
7.1 to 9.3
Strength to Weight: Bending, points 13 to 18
6.9 to 8.3
Thermal Shock Resistance, points 12 to 21
21 to 28

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.15
0
Copper (Cu), % 85 to 90
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 0 to 0.25
0
Lead (Pb), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 4.5 to 6.0
0
Phosphorus (P), % 0 to 0.050
0
Platinum (Pt), % 0
84.3 to 85.5
Silicon (Si), % 0 to 0.0050
0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 4.5 to 6.0
0
Zinc (Zn), % 1.0 to 2.5
0
Residuals, % 0
0 to 0.2