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AWS BVAg-31 vs. R30605 Cobalt

AWS BVAg-31 belongs to the otherwise unclassified metals classification, while R30605 cobalt belongs to the cobalt alloys. There are 15 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 AWS BVAg-31 and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 90
210
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 33
81
Tensile Strength: Ultimate (UTS), MPa 180
1130 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 150
290
Melting Completion (Liquidus), °C 850
1410
Melting Onset (Solidus), °C 820
1330
Specific Heat Capacity, J/kg-K 280
410
Thermal Expansion, µm/m-K 18
12

Otherwise Unclassified Properties

Density, g/cm3 10
9.6

Common Calculations

Stiffness to Weight: Axial, points 4.9
12
Stiffness to Weight: Bending, points 15
21
Strength to Weight: Axial, points 4.9
33 to 55
Strength to Weight: Bending, points 7.0
25 to 36
Thermal Shock Resistance, points 7.8
31 to 52

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 31 to 33
0
Iron (Fe), % 0
0 to 3.0
Lead (Pb), % 0 to 0.0020
0
Manganese (Mn), % 0
1.0 to 2.0
Nickel (Ni), % 0
9.0 to 11
Palladium (Pd), % 8.0 to 12
0
Phosphorus (P), % 0 to 0.0020
0 to 0.040
Silicon (Si), % 0
0 to 0.4
Silver (Ag), % 57 to 59
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 0 to 0.0010
0