AWS E316LMn vs. R31537 Cobalt

AWS E316LMn belongs to the iron alloys classification, while R31537 cobalt belongs to the cobalt alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 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 E316LMn and the bottom bar is R31537 cobalt.

AWS E316LMn (W31622) Weld Metal Low Carbon Co-28Cr-6Mo Alloy (ASTM F1537 Alloy 1, ISO 5832-12 Alloy 1, R31537)

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		220

Elongation at Break, %		23
Elongation at Break, %		14 to 23

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		79
Shear Modulus, GPa		87

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		1000 to 1340

Thermal Properties

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

Melting Completion (Liquidus), °C		1420
Melting Completion (Liquidus), °C		1360

Melting Onset (Solidus), °C		1370
Melting Onset (Solidus), °C		1290

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		450

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

Otherwise Unclassified Properties

Density, g/cm³		7.9
Density, g/cm³		8.4

Embodied Carbon, kg CO₂/kg material		4.6
Embodied Carbon, kg CO₂/kg material		8.1

Embodied Energy, MJ/kg		64
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		180
Embodied Water, L/kg		530

Common Calculations

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

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

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		33 to 44

Strength to Weight: Bending, points		20
Strength to Weight: Bending, points		26 to 32

Thermal Shock Resistance, points		15
Thermal Shock Resistance, points		24 to 32

Alloy Composition

Carbon (C), %		0 to 0.040
Carbon (C), %		0 to 0.14

Chromium (Cr), %		18 to 21
Chromium (Cr), %		26 to 30

Cobalt (Co), %		0
Cobalt (Co), %		58.9 to 69

Copper (Cu), %		0 to 0.75
Copper (Cu), %		0

Iron (Fe), %		47.5 to 59.4
Iron (Fe), %		0 to 0.75

Manganese (Mn), %		5.0 to 8.0
Manganese (Mn), %		0 to 1.0

Molybdenum (Mo), %		2.5 to 3.5
Molybdenum (Mo), %		5.0 to 7.0

Nickel (Ni), %		15 to 18
Nickel (Ni), %		0 to 1.0

Nitrogen (N), %		0.1 to 0.25
Nitrogen (N), %		0 to 0.25

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

Silicon (Si), %		0 to 0.9
Silicon (Si), %		0 to 1.0

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