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R30001 Cobalt vs. AWS E308L

R30001 cobalt belongs to the cobalt alloys classification, while AWS E308L belongs to the iron alloys. They have a modest 23% 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 (4, in this case) are not shown.

For each property being compared, the top bar is R30001 cobalt and the bottom bar is AWS E308L.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
40
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 86
78
Tensile Strength: Ultimate (UTS), MPa 620
580

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Melting Completion (Liquidus), °C 1530
1420
Melting Onset (Solidus), °C 1260
1380
Specific Heat Capacity, J/kg-K 430
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.5

Otherwise Unclassified Properties

Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 8.9
3.2
Embodied Energy, MJ/kg 130
46
Embodied Water, L/kg 460
150

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 19
21
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 3.7
4.1
Thermal Shock Resistance, points 19
15

Alloy Composition

Carbon (C), % 2.0 to 3.0
0 to 0.040
Chromium (Cr), % 28 to 32
18 to 21
Cobalt (Co), % 43 to 59
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 3.0
62.9 to 72.5
Manganese (Mn), % 0
0.5 to 2.5
Molybdenum (Mo), % 0 to 1.0
0 to 0.75
Nickel (Ni), % 0 to 3.0
9.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 11 to 13
0