MakeItFrom.com
Menu (ESC)

R31233 Cobalt vs. AWS E385

R31233 cobalt belongs to the cobalt alloys classification, while AWS E385 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 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is AWS E385.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 17
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 85
79
Tensile Strength: Ultimate (UTS), MPa 1020
580

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1350
1440
Melting Onset (Solidus), °C 1330
1390
Specific Heat Capacity, J/kg-K 440
460
Thermal Conductivity, W/m-K 12
14
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
1.9

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.1
Embodied Carbon, kg CO2/kg material 8.4
5.8
Embodied Energy, MJ/kg 110
79
Embodied Water, L/kg 480
200

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
20
Strength to Weight: Bending, points 26
19
Thermal Diffusivity, mm2/s 3.2
3.6
Thermal Shock Resistance, points 25
15

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.030
Chromium (Cr), % 23.5 to 27.5
19.5 to 21.5
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 1.0 to 5.0
41.8 to 50.1
Manganese (Mn), % 0.1 to 1.5
1.0 to 2.5
Molybdenum (Mo), % 4.0 to 6.0
4.2 to 5.2
Nickel (Ni), % 7.0 to 11
24 to 26
Nitrogen (N), % 0.030 to 0.12
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.050 to 1.0
0 to 0.9
Sulfur (S), % 0 to 0.020
0 to 0.020
Tungsten (W), % 1.0 to 3.0
0