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R31233 Cobalt vs. AWS E209

R31233 cobalt belongs to the cobalt alloys classification, while AWS E209 belongs to the iron alloys. They have a modest 38% 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 (10, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is AWS E209.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 17
17
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 85
79
Tensile Strength: Ultimate (UTS), MPa 1020
770

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1350
1420
Melting Onset (Solidus), °C 1330
1370
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 8.4
4.4
Embodied Energy, MJ/kg 110
63
Embodied Water, L/kg 480
180

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33
28
Strength to Weight: Bending, points 26
24
Thermal Shock Resistance, points 25
19

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.060
Chromium (Cr), % 23.5 to 27.5
20.5 to 24
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 1.0 to 5.0
51.5 to 64.3
Manganese (Mn), % 0.1 to 1.5
4.0 to 7.0
Molybdenum (Mo), % 4.0 to 6.0
1.5 to 3.0
Nickel (Ni), % 7.0 to 11
9.5 to 12
Nitrogen (N), % 0.030 to 0.12
0.1 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.050 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 1.0 to 3.0
0
Vanadium (V), % 0
0.1 to 0.3