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R30816 Cobalt vs. AWS BVAg-18

R30816 cobalt belongs to the cobalt alloys classification, while AWS BVAg-18 belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is AWS BVAg-18.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
82
Poisson's Ratio 0.3
0.36
Shear Modulus, GPa 81
30
Tensile Strength: Ultimate (UTS), MPa 1020
180

Thermal Properties

Latent Heat of Fusion, J/g 300
140
Melting Completion (Liquidus), °C 1540
720
Melting Onset (Solidus), °C 1460
600
Specific Heat Capacity, J/kg-K 420
280
Thermal Expansion, µm/m-K 12
19

Otherwise Unclassified Properties

Density, g/cm3 9.1
9.7
Embodied Carbon, kg CO2/kg material 20
59
Embodied Energy, MJ/kg 320
930

Common Calculations

Stiffness to Weight: Axial, points 13
4.7
Stiffness to Weight: Bending, points 22
15
Strength to Weight: Axial, points 31
5.1
Strength to Weight: Bending, points 25
7.3
Thermal Shock Resistance, points 28
8.1

Alloy Composition

Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0.32 to 0.42
0 to 0.0050
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
28.5 to 31.5
Iron (Fe), % 0 to 5.0
0
Lead (Pb), % 0
0 to 0.0020
Manganese (Mn), % 1.0 to 2.0
0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.0020
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
59 to 61
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 3.5 to 4.5
0
Tin (Sn), % 0
9.5 to 10.5
Tungsten (W), % 3.5 to 4.5
0
Zinc (Zn), % 0
0 to 0.0010