AWS BVAg-0 vs. R30155 Cobalt

AWS BVAg-0 belongs to the otherwise unclassified metals classification, while R30155 cobalt belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is AWS BVAg-0 and the bottom bar is R30155 cobalt.

AWS BVAg-0 (P07017) Vacuum Service Filler Metal UNS R30155 (formerly Grade 661) Iron-Cobalt Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		71
Elastic (Young's, Tensile) Modulus, GPa		210

Poisson's Ratio		0.37
Poisson's Ratio		0.29

Shear Modulus, GPa		26
Shear Modulus, GPa		81

Tensile Strength: Ultimate (UTS), MPa		130
Tensile Strength: Ultimate (UTS), MPa		850

Thermal Properties

Latent Heat of Fusion, J/g		110
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		960
Melting Completion (Liquidus), °C		1470

Melting Onset (Solidus), °C		960
Melting Onset (Solidus), °C		1420

Specific Heat Capacity, J/kg-K		240
Specific Heat Capacity, J/kg-K		450

Thermal Expansion, µm/m-K		20
Thermal Expansion, µm/m-K		14

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		8.5

Common Calculations

Stiffness to Weight: Axial, points		3.8
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		13
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		3.4
Strength to Weight: Axial, points		28

Strength to Weight: Bending, points		5.4
Strength to Weight: Bending, points		24

Thermal Shock Resistance, points		6.6
Thermal Shock Resistance, points		21

Alloy Composition

Cadmium (Cd), %		0 to 0.0010
Cadmium (Cd), %		0

Carbon (C), %		0 to 0.0050
Carbon (C), %		0.080 to 0.16

Chromium (Cr), %		0
Chromium (Cr), %		20 to 22.5

Cobalt (Co), %		0
Cobalt (Co), %		18.5 to 21

Copper (Cu), %		0 to 0.050
Copper (Cu), %		0

Iron (Fe), %		0
Iron (Fe), %		24.3 to 36.2

Lead (Pb), %		0 to 0.0020
Lead (Pb), %		0

Manganese (Mn), %		0
Manganese (Mn), %		1.0 to 2.0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		2.5 to 3.5

Nickel (Ni), %		0
Nickel (Ni), %		19 to 21

Niobium (Nb), %		0
Niobium (Nb), %		0.75 to 1.3

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.2

Phosphorus (P), %		0 to 0.0020
Phosphorus (P), %		0 to 0.040

Silicon (Si), %		0
Silicon (Si), %		0 to 1.0

Silver (Ag), %		99.95 to 100
Silver (Ag), %		0

Sulfur (S), %		0
Sulfur (S), %		0 to 0.030

Tantalum (Ta), %		0
Tantalum (Ta), %		0.75 to 1.3

Tungsten (W), %		0
Tungsten (W), %		2.0 to 3.0

Zinc (Zn), %		0 to 0.0010
Zinc (Zn), %		0