G-CoCr28 Cobalt vs. AWS E630

G-CoCr28 cobalt belongs to the cobalt alloys classification, while AWS E630 belongs to the iron alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 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 G-CoCr28 cobalt and the bottom bar is AWS E630.

G-CoCr28 (2.4778) Cobalt-Chromium Alloy AWS E630 (W37410) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		210
Elastic (Young's, Tensile) Modulus, GPa		190

Elongation at Break, %		6.7
Elongation at Break, %		8.0

Poisson's Ratio		0.28
Poisson's Ratio		0.28

Shear Modulus, GPa		83
Shear Modulus, GPa		76

Tensile Strength: Ultimate (UTS), MPa		560
Tensile Strength: Ultimate (UTS), MPa		1040

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		280

Melting Completion (Liquidus), °C		1330
Melting Completion (Liquidus), °C		1430

Melting Onset (Solidus), °C		1270
Melting Onset (Solidus), °C		1380

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		470

Thermal Conductivity, W/m-K		8.5
Thermal Conductivity, W/m-K		17

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

Otherwise Unclassified Properties

Base Metal Price, % relative		100
Base Metal Price, % relative		14

Density, g/cm³		8.1
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		6.2
Embodied Carbon, kg CO₂/kg material		2.8

Embodied Energy, MJ/kg		84
Embodied Energy, MJ/kg		40

Embodied Water, L/kg		440
Embodied Water, L/kg		140

Common Calculations

Stiffness to Weight: Axial, points		15
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		37

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		29

Thermal Diffusivity, mm²/s		2.2
Thermal Diffusivity, mm²/s		4.5

Thermal Shock Resistance, points		14
Thermal Shock Resistance, points		28

Alloy Composition

Carbon (C), %		0.050 to 0.25
Carbon (C), %		0 to 0.050

Chromium (Cr), %		27 to 30
Chromium (Cr), %		16 to 16.8

Cobalt (Co), %		48 to 52
Cobalt (Co), %		0

Copper (Cu), %		0
Copper (Cu), %		3.3 to 4.0

Iron (Fe), %		9.7 to 24.5
Iron (Fe), %		71.6 to 75.9

Manganese (Mn), %		0 to 1.5
Manganese (Mn), %		0.25 to 0.75

Molybdenum (Mo), %		0 to 0.5
Molybdenum (Mo), %		0 to 0.75

Nickel (Ni), %		0 to 4.0
Nickel (Ni), %		4.5 to 5.0

Niobium (Nb), %		0 to 0.5
Niobium (Nb), %		0.15 to 0.3

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

Silicon (Si), %		0.5 to 1.5
Silicon (Si), %		0 to 0.75

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