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R30075 Cobalt vs. 50Cr-50Ni Alloy

R30075 cobalt belongs to the cobalt alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. They have a modest 30% 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 (9, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is 50Cr-50Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
210
Elongation at Break, % 12
5.7
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 82 to 98
84
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
620
Tensile Strength: Yield (Proof), MPa 480 to 840
390

Thermal Properties

Latent Heat of Fusion, J/g 320
350
Specific Heat Capacity, J/kg-K 450
490
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 8.1
7.9
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 530
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
31
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
350
Stiffness to Weight: Axial, points 14 to 17
15
Stiffness to Weight: Bending, points 24 to 25
25
Strength to Weight: Axial, points 26 to 42
21
Strength to Weight: Bending, points 22 to 31
20
Thermal Shock Resistance, points 21 to 29
14

Alloy Composition

Aluminum (Al), % 0 to 0.1
0 to 0.25
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0 to 0.1
Chromium (Cr), % 27 to 30
48 to 52
Cobalt (Co), % 58.7 to 68
0
Iron (Fe), % 0 to 0.75
0 to 1.0
Manganese (Mn), % 0 to 1.0
0 to 0.3
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
44.5 to 52
Nitrogen (N), % 0 to 0.25
0 to 0.3
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.020
Titanium (Ti), % 0 to 0.1
0 to 0.5
Tungsten (W), % 0 to 0.2
0