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R30008 Cobalt vs. ASTM B596 Au-Cu

R30008 cobalt belongs to the cobalt alloys classification, while ASTM B596 Au-Cu belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (10, 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 R30008 cobalt and the bottom bar is ASTM B596 Au-Cu.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
100
Elongation at Break, % 1.1 to 73
4.3 to 17
Poisson's Ratio 0.29
0.41
Shear Modulus, GPa 83
36
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
450 to 620

Thermal Properties

Latent Heat of Fusion, J/g 320
77
Melting Completion (Liquidus), °C 1400
1060
Melting Onset (Solidus), °C 1330
930
Specific Heat Capacity, J/kg-K 450
150
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Density, g/cm3 8.4
18

Common Calculations

Stiffness to Weight: Axial, points 14
3.1
Stiffness to Weight: Bending, points 24
8.5
Strength to Weight: Axial, points 31 to 56
6.8 to 9.4
Strength to Weight: Bending, points 25 to 37
7.1 to 8.8
Thermal Shock Resistance, points 25 to 44
22 to 30

Alloy Composition

Boron (B), % 0 to 0.0010
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 18.5 to 21.5
0
Cobalt (Co), % 39 to 42
0
Copper (Cu), % 0
9.0 to 11
Gold (Au), % 0
89 to 91
Iron (Fe), % 7.6 to 20
0
Manganese (Mn), % 1.0 to 2.0
0
Molybdenum (Mo), % 6.5 to 7.5
0
Nickel (Ni), % 15 to 18
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
0
Sulfur (S), % 0 to 0.015
0
Residuals, % 0
0 to 0.4

Comparable Variants