C55284 Copper vs. R30008 Cobalt

C55284 copper belongs to the copper alloys classification, while R30008 cobalt belongs to the cobalt alloys. There are 17 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is C55284 copper and the bottom bar is R30008 cobalt.

UNS C55284 (BCuP-5) Filler Metal UNS R30008 (ASTM F1058 Grade 2) Cobalt

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		100
Elastic (Young's, Tensile) Modulus, GPa		210

Poisson's Ratio		0.34
Poisson's Ratio		0.29

Shear Modulus, GPa		38
Shear Modulus, GPa		83

Tensile Strength: Ultimate (UTS), MPa		180
Tensile Strength: Ultimate (UTS), MPa		950 to 1700

Thermal Properties

Latent Heat of Fusion, J/g		180
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		800
Melting Completion (Liquidus), °C		1400

Melting Onset (Solidus), °C		640
Melting Onset (Solidus), °C		1330

Specific Heat Capacity, J/kg-K		380
Specific Heat Capacity, J/kg-K		450

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Density, g/cm³		8.9
Density, g/cm³		8.4

Embodied Carbon, kg CO₂/kg material		16
Embodied Carbon, kg CO₂/kg material		8.1

Embodied Energy, MJ/kg		260
Embodied Energy, MJ/kg		110

Common Calculations

Stiffness to Weight: Axial, points		6.5
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		5.6
Strength to Weight: Axial, points		31 to 56

Strength to Weight: Bending, points		8.0
Strength to Weight: Bending, points		25 to 37

Thermal Shock Resistance, points		7.4
Thermal Shock Resistance, points		25 to 44

Alloy Composition

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Boron (B), %		0
Boron (B), %		0 to 0.0010

Carbon (C), %		0
Carbon (C), %		0 to 0.15

Chromium (Cr), %		0
Chromium (Cr), %		18.5 to 21.5

Cobalt (Co), %		0
Cobalt (Co), %		39 to 42

Copper (Cu), %		79.2 to 80.7
Copper (Cu), %		0

Iron (Fe), %		0
Iron (Fe), %		7.6 to 20

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

Molybdenum (Mo), %		0
Molybdenum (Mo), %		6.5 to 7.5

Nickel (Ni), %		0
Nickel (Ni), %		15 to 18

Phosphorus (P), %		4.8 to 5.2
Phosphorus (P), %		0 to 0.015

Silicon (Si), %		0
Silicon (Si), %		0 to 1.2

Silver (Ag), %		14.5 to 15.5
Silver (Ag), %		0

Sulfur (S), %		0
Sulfur (S), %		0 to 0.015

Residuals, %		0 to 0.15
Residuals, %		0