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R31233 Cobalt vs. AWS E3155

R31233 cobalt belongs to the cobalt alloys classification, while AWS E3155 belongs to the iron alloys. They have 59% of their average alloy composition in common. There are 21 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 R31233 cobalt and the bottom bar is AWS E3155.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 17
23
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 85
81
Tensile Strength: Ultimate (UTS), MPa 1020
770

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1330
1410
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 12
13
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.4
Embodied Carbon, kg CO2/kg material 8.4
7.7
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 480
300

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
26
Strength to Weight: Bending, points 26
22
Thermal Diffusivity, mm2/s 3.2
3.3
Thermal Shock Resistance, points 25
20

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.1
Chromium (Cr), % 23.5 to 27.5
20 to 22.5
Cobalt (Co), % 44.7 to 63.3
18.5 to 21
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 1.0 to 5.0
23.3 to 36.3
Manganese (Mn), % 0.1 to 1.5
1.0 to 2.5
Molybdenum (Mo), % 4.0 to 6.0
2.5 to 3.5
Nickel (Ni), % 7.0 to 11
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0.030 to 0.12
0
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
2.0 to 3.0