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R31233 Cobalt vs. AWS BVAu-7

R31233 cobalt belongs to the cobalt alloys classification, while AWS BVAu-7 belongs to the otherwise unclassified metals. There are 15 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 R31233 cobalt and the bottom bar is AWS BVAu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
130
Poisson's Ratio 0.29
0.38
Shear Modulus, GPa 85
45
Tensile Strength: Ultimate (UTS), MPa 1020
200

Thermal Properties

Latent Heat of Fusion, J/g 320
140
Melting Completion (Liquidus), °C 1350
1120
Melting Onset (Solidus), °C 1330
1100
Specific Heat Capacity, J/kg-K 440
240
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Density, g/cm3 8.6
15

Common Calculations

Stiffness to Weight: Axial, points 14
4.7
Stiffness to Weight: Bending, points 23
11
Strength to Weight: Axial, points 33
3.7
Strength to Weight: Bending, points 26
5.1
Thermal Shock Resistance, points 25
8.9

Alloy Composition

Boron (B), % 0 to 0.015
0
Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0.020 to 0.1
0 to 0.0050
Chromium (Cr), % 23.5 to 27.5
0
Cobalt (Co), % 44.7 to 63.3
0 to 0.060
Gold (Au), % 0
49.5 to 50.5
Iron (Fe), % 1.0 to 5.0
0
Lead (Pb), % 0
0 to 0.0020
Manganese (Mn), % 0.1 to 1.5
0
Molybdenum (Mo), % 4.0 to 6.0
0
Nickel (Ni), % 7.0 to 11
24.5 to 25.5
Nitrogen (N), % 0.030 to 0.12
0
Palladium (Pd), % 0
23.9 to 26
Phosphorus (P), % 0 to 0.030
0 to 0.0020
Silicon (Si), % 0.050 to 1.0
0
Sulfur (S), % 0 to 0.020
0
Tungsten (W), % 1.0 to 3.0
0
Zinc (Zn), % 0
0 to 0.0010