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ASTM B628 Ag-Cu vs. 90-platinum 10-iridium

Both ASTM B628 Ag-Cu and 90-platinum 10-iridium are otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (4, 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 ASTM B628 Ag-Cu and the bottom bar is 90-platinum 10-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
200
Elongation at Break, % 1.1 to 17
5.5 to 34
Poisson's Ratio 0.36
0.38
Shear Modulus, GPa 31
74
Shear Strength, MPa 210 to 430
220 to 320
Tensile Strength: Ultimate (UTS), MPa 350 to 760
330 to 550

Thermal Properties

Latent Heat of Fusion, J/g 140
100
Specific Heat Capacity, J/kg-K 280
130
Thermal Expansion, µm/m-K 19
8.6

Otherwise Unclassified Properties

Density, g/cm3 10
22

Common Calculations

Stiffness to Weight: Axial, points 4.6
5.3
Stiffness to Weight: Bending, points 14
9.1
Strength to Weight: Axial, points 9.5 to 21
4.2 to 7.1
Strength to Weight: Bending, points 11 to 18
4.9 to 6.9
Thermal Shock Resistance, points 16 to 34
13 to 22

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 26.6 to 29
0
Iridium (Ir), % 0
9.5 to 10.5
Iron (Fe), % 0 to 0.050
0
Lead (Pb), % 0 to 0.030
0
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.030
0
Platinum (Pt), % 0
89.3 to 90.5
Silver (Ag), % 71 to 73
0
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0
0 to 0.2

Comparable Variants