AWS E320LR vs. R30008 Cobalt

AWS E320LR belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. They have 54% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AWS E320LR and the bottom bar is R30008 cobalt.

AWS E320LR (W88022) Weld Metal UNS R30008 (ASTM F1058 Grade 2) Cobalt

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		210

Elongation at Break, %		34
Elongation at Break, %		1.1 to 73

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		77
Shear Modulus, GPa		83

Tensile Strength: Ultimate (UTS), MPa		580
Tensile Strength: Ultimate (UTS), MPa		950 to 1700

Thermal Properties

Latent Heat of Fusion, J/g		300
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		1410
Melting Completion (Liquidus), °C		1400

Melting Onset (Solidus), °C		1360
Melting Onset (Solidus), °C		1330

Specific Heat Capacity, J/kg-K		460
Specific Heat Capacity, J/kg-K		450

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Base Metal Price, % relative		36
Base Metal Price, % relative		95

Density, g/cm³		8.2
Density, g/cm³		8.4

Embodied Carbon, kg CO₂/kg material		6.2
Embodied Carbon, kg CO₂/kg material		8.1

Embodied Energy, MJ/kg		87
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		220
Embodied Water, L/kg		400

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		14

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

Strength to Weight: Axial, points		20
Strength to Weight: Axial, points		31 to 56

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		25 to 37

Thermal Shock Resistance, points		15
Thermal Shock Resistance, points		25 to 44

Alloy Composition

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

Carbon (C), %		0 to 0.030
Carbon (C), %		0 to 0.15

Chromium (Cr), %		19 to 21
Chromium (Cr), %		18.5 to 21.5

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

Copper (Cu), %		3.0 to 4.0
Copper (Cu), %		0

Iron (Fe), %		32.7 to 42.5
Iron (Fe), %		7.6 to 20

Manganese (Mn), %		1.5 to 2.5
Manganese (Mn), %		1.0 to 2.0

Molybdenum (Mo), %		2.0 to 3.0
Molybdenum (Mo), %		6.5 to 7.5

Nickel (Ni), %		32 to 36
Nickel (Ni), %		15 to 18

Niobium (Nb), %		0 to 0.4
Niobium (Nb), %		0

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0 to 0.015

Silicon (Si), %		0 to 0.3
Silicon (Si), %		0 to 1.2

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