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R30006 Cobalt vs. AWS BAu-2

R30006 cobalt belongs to the cobalt alloys classification, while AWS BAu-2 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is AWS BAu-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
100
Poisson's Ratio 0.28
0.4
Shear Modulus, GPa 85
36
Tensile Strength: Ultimate (UTS), MPa 900
150

Thermal Properties

Latent Heat of Fusion, J/g 320
92
Melting Completion (Liquidus), °C 1400
890
Melting Onset (Solidus), °C 1290
890
Specific Heat Capacity, J/kg-K 450
180
Thermal Expansion, µm/m-K 11
15

Otherwise Unclassified Properties

Density, g/cm3 8.6
17

Common Calculations

Stiffness to Weight: Axial, points 14
3.3
Stiffness to Weight: Bending, points 23
9.1
Strength to Weight: Axial, points 29
2.4
Strength to Weight: Bending, points 24
3.6
Thermal Shock Resistance, points 26
7.1

Alloy Composition


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Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
19.4 to 20.5
Gold (Au), % 0
79.5 to 80.5
Iron (Fe), % 0 to 3.0
0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0
Tungsten (W), % 4.0 to 6.0
0
Residuals, % 0
0 to 0.15