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R31538 Cobalt vs. AWS E90C-B9

R31538 cobalt belongs to the cobalt alloys classification, while AWS E90C-B9 belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is AWS E90C-B9.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 23
18
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
75
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
710
Tensile Strength: Yield (Proof), MPa 580 to 930
460

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1410
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
25
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.0

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.1
2.6
Embodied Energy, MJ/kg 110
37
Embodied Water, L/kg 530
91

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
110
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
550
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 34 to 45
25
Strength to Weight: Bending, points 27 to 32
23
Thermal Diffusivity, mm2/s 3.5
6.9
Thermal Shock Resistance, points 25 to 33
20

Alloy Composition


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Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.15 to 0.35
0.080 to 0.13
Chromium (Cr), % 26 to 30
8.0 to 10.5
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 0 to 0.75
84.4 to 90.9
Manganese (Mn), % 0 to 1.0
0 to 1.2
Molybdenum (Mo), % 5.0 to 7.0
0.85 to 1.2
Nickel (Ni), % 0 to 1.0
0 to 0.8
Niobium (Nb), % 0
0.020 to 0.1
Nitrogen (N), % 0 to 0.25
0.030 to 0.070
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Vanadium (V), % 0
0.15 to 0.3
Residuals, % 0
0 to 0.5