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ASTM B541 Gold vs. R30016 Cobalt

ASTM B541 gold belongs to the otherwise unclassified metals classification, while R30016 cobalt belongs to the cobalt alloys. There are 21 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM B541 gold and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 6.0 to 14
8.4
Poisson's Ratio 0.4
0.28
Shear Modulus, GPa 38
85
Tensile Strength: Ultimate (UTS), MPa 670 to 1180
1010
Tensile Strength: Yield (Proof), MPa 480 to 900
580

Thermal Properties

Latent Heat of Fusion, J/g 90
320
Melting Completion (Liquidus), °C 1110
1360
Melting Onset (Solidus), °C 930
1270
Specific Heat Capacity, J/kg-K 170
450
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7 to 12
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0 to 6.2
2.0

Otherwise Unclassified Properties

Density, g/cm3 17
8.5

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 91
72
Resilience: Unit (Modulus of Resilience), kJ/m3 1090 to 3830
770
Stiffness to Weight: Axial, points 3.4
14
Stiffness to Weight: Bending, points 9.0
24
Strength to Weight: Axial, points 11 to 19
33
Strength to Weight: Bending, points 9.8 to 14
26
Thermal Shock Resistance, points 36 to 63
24

Alloy Composition

Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Copper (Cu), % 13.5 to 15.5
0
Gold (Au), % 70.5 to 72.5
0
Iron (Fe), % 0
0 to 3.0
Manganese (Mn), % 0
0.5 to 2.0
Molybdenum (Mo), % 0
0 to 1.5
Nickel (Ni), % 0
0 to 3.0
Platinum (Pt), % 8.0 to 9.0
0
Silicon (Si), % 0
0.2 to 2.0
Silver (Ag), % 4.0 to 5.0
0
Tungsten (W), % 0
3.5 to 5.5
Zinc (Zn), % 0.7 to 1.3
0
Residuals, % 0 to 0.4
0