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R30075 Cobalt vs. AWS BVAg-31

R30075 cobalt belongs to the cobalt alloys classification, while AWS BVAg-31 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is AWS BVAg-31.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
90
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 82 to 98
33
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
180

Thermal Properties

Latent Heat of Fusion, J/g 320
150
Melting Completion (Liquidus), °C 1360
850
Melting Onset (Solidus), °C 1290
820
Specific Heat Capacity, J/kg-K 450
280
Thermal Expansion, µm/m-K 12
18

Otherwise Unclassified Properties

Density, g/cm3 8.4
10

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
4.9
Stiffness to Weight: Bending, points 24 to 25
15
Strength to Weight: Axial, points 26 to 42
4.9
Strength to Weight: Bending, points 22 to 31
7.0
Thermal Shock Resistance, points 21 to 29
7.8

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0 to 0.35
0 to 0.0050
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
31 to 33
Iron (Fe), % 0 to 0.75
0
Lead (Pb), % 0
0 to 0.0020
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.25
0
Palladium (Pd), % 0
8.0 to 12
Phosphorus (P), % 0 to 0.020
0 to 0.0020
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
57 to 59
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Zinc (Zn), % 0
0 to 0.0010