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C46200 Brass vs. 85-platinum 15-iridium

C46200 brass belongs to the copper 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 C46200 brass and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220
Elongation at Break, % 17 to 34
5.5 to 34
Poisson's Ratio 0.31
0.38
Shear Modulus, GPa 40
81
Shear Strength, MPa 240 to 290
370 to 420
Tensile Strength: Ultimate (UTS), MPa 370 to 480
560 to 730

Thermal Properties

Latent Heat of Fusion, J/g 170
110
Melting Completion (Liquidus), °C 840
1820
Melting Onset (Solidus), °C 800
1790
Specific Heat Capacity, J/kg-K 380
130
Thermal Expansion, µm/m-K 20
8.4

Otherwise Unclassified Properties

Density, g/cm3 8.1
22

Common Calculations

Stiffness to Weight: Axial, points 7.2
5.7
Stiffness to Weight: Bending, points 19
9.3
Strength to Weight: Axial, points 13 to 16
7.1 to 9.3
Strength to Weight: Bending, points 14 to 17
6.9 to 8.3
Thermal Shock Resistance, points 12 to 16
21 to 28

Alloy Composition

Copper (Cu), % 62 to 65
0
Iridium (Ir), % 0
14.5 to 15.5
Iron (Fe), % 0 to 0.1
0
Lead (Pb), % 0 to 0.2
0
Platinum (Pt), % 0
84.3 to 85.5
Tin (Sn), % 0.5 to 1.0
0
Zinc (Zn), % 33.3 to 37.5
0
Residuals, % 0
0 to 0.2