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R30075 Cobalt vs. AWS E320LR

R30075 cobalt belongs to the cobalt alloys classification, while AWS E320LR belongs to the iron 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 (11, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is AWS E320LR.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
200
Elongation at Break, % 12
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 82 to 98
77
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
580

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1360
1410
Melting Onset (Solidus), °C 1290
1360
Specific Heat Capacity, J/kg-K 450
460
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.2
Embodied Carbon, kg CO2/kg material 8.1
6.2
Embodied Energy, MJ/kg 110
87
Embodied Water, L/kg 530
220

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
13
Stiffness to Weight: Bending, points 24 to 25
24
Strength to Weight: Axial, points 26 to 42
20
Strength to Weight: Bending, points 22 to 31
19
Thermal Shock Resistance, points 21 to 29
15

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0 to 0.030
Chromium (Cr), % 27 to 30
19 to 21
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
3.0 to 4.0
Iron (Fe), % 0 to 0.75
32.7 to 42.5
Manganese (Mn), % 0 to 1.0
1.5 to 2.5
Molybdenum (Mo), % 5.0 to 7.0
2.0 to 3.0
Nickel (Ni), % 0 to 0.5
32 to 36
Niobium (Nb), % 0
0 to 0.4
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0