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Chromium 33 vs. R31539 Cobalt

Chromium 33 belongs to the otherwise unclassified metals classification, while R31539 cobalt belongs to the cobalt alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is chromium 33 and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 45
13 to 22
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
86
Tensile Strength: Ultimate (UTS), MPa 850
1000 to 1340
Tensile Strength: Yield (Proof), MPa 430
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 6.0
8.2
Embodied Energy, MJ/kg 84
110
Embodied Water, L/kg 250
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 450
780 to 2000
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 30
33 to 44
Strength to Weight: Bending, points 25
27 to 32
Thermal Shock Resistance, points 21
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0 to 0.015
0 to 0.14
Chromium (Cr), % 31 to 35
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 0.3 to 1.2
0
Iron (Fe), % 25.7 to 37.9
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0.5 to 2.0
5.0 to 7.0
Nickel (Ni), % 30 to 33
0 to 1.0
Nitrogen (N), % 0.35 to 0.6
0 to 0.25
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0