AWS ERNiMo-3 vs. R31538 Cobalt

AWS ERNiMo-3 belongs to the nickel alloys classification, while R31538 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiMo-3 and the bottom bar is R31538 cobalt.

AWS ERNiMo-3 Weld Metal High Carbon Co-28Cr-6Mo Alloy (ASTM F1537 Alloy 2, ISO 5832-12 Alloy 2, R31538)

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		220
Elastic (Young's, Tensile) Modulus, GPa		220

Poisson's Ratio		0.3
Poisson's Ratio		0.29

Shear Modulus, GPa		83
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		770
Tensile Strength: Ultimate (UTS), MPa		1020 to 1360

Thermal Properties

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

Melting Completion (Liquidus), °C		1600
Melting Completion (Liquidus), °C		1360

Melting Onset (Solidus), °C		1540
Melting Onset (Solidus), °C		1290

Specific Heat Capacity, J/kg-K		400
Specific Heat Capacity, J/kg-K		450

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Density, g/cm³		9.1
Density, g/cm³		8.4

Embodied Carbon, kg CO₂/kg material		15
Embodied Carbon, kg CO₂/kg material		8.1

Embodied Energy, MJ/kg		190
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		270
Embodied Water, L/kg		530

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		22
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		24
Strength to Weight: Axial, points		34 to 45

Strength to Weight: Bending, points		21
Strength to Weight: Bending, points		27 to 32

Thermal Shock Resistance, points		24
Thermal Shock Resistance, points		25 to 33

Alloy Composition

Carbon (C), %		0 to 0.12
Carbon (C), %		0.15 to 0.35

Chromium (Cr), %		4.0 to 6.0
Chromium (Cr), %		26 to 30

Cobalt (Co), %		0 to 2.5
Cobalt (Co), %		58.7 to 68.9

Copper (Cu), %		0 to 0.5
Copper (Cu), %		0

Iron (Fe), %		4.0 to 7.0
Iron (Fe), %		0 to 0.75

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

Molybdenum (Mo), %		23 to 26
Molybdenum (Mo), %		5.0 to 7.0

Nickel (Ni), %		53.7 to 69
Nickel (Ni), %		0 to 1.0

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.25

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

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

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

Tungsten (W), %		0 to 1.0
Tungsten (W), %		0

Vanadium (V), %		0 to 0.6
Vanadium (V), %		0

Residuals, %		0 to 0.5
Residuals, %		0