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AWS BVAg-30 vs. R30816 Cobalt

AWS BVAg-30 belongs to the otherwise unclassified metals classification, while R30816 cobalt belongs to the cobalt alloys. 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 AWS BVAg-30 and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 86
210
Poisson's Ratio 0.36
0.3
Shear Modulus, GPa 31
81
Tensile Strength: Ultimate (UTS), MPa 170
1020

Thermal Properties

Latent Heat of Fusion, J/g 140
300
Melting Completion (Liquidus), °C 810
1540
Melting Onset (Solidus), °C 810
1460
Specific Heat Capacity, J/kg-K 280
420
Thermal Expansion, µm/m-K 19
12

Otherwise Unclassified Properties

Density, g/cm3 10
9.1

Common Calculations

Stiffness to Weight: Axial, points 4.7
13
Stiffness to Weight: Bending, points 14
22
Strength to Weight: Axial, points 4.7
31
Strength to Weight: Bending, points 6.7
25
Thermal Shock Resistance, points 7.6
28

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 25.5 to 28.5
0
Iron (Fe), % 0
0 to 5.0
Lead (Pb), % 0 to 0.0020
0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Palladium (Pd), % 4.5 to 5.5
0
Phosphorus (P), % 0 to 0.0020
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 67 to 69
0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.0010
0