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50Cr-50Ni Alloy vs. R30012 Cobalt

50Cr-50Ni alloy belongs to the otherwise unclassified metals classification, while R30012 cobalt belongs to the cobalt alloys. They have a modest 32% 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 50Cr-50Ni alloy and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 5.7
1.0
Poisson's Ratio 0.26
0.28
Shear Modulus, GPa 84
86
Tensile Strength: Ultimate (UTS), MPa 620
830
Tensile Strength: Yield (Proof), MPa 390
650

Thermal Properties

Latent Heat of Fusion, J/g 350
320
Specific Heat Capacity, J/kg-K 490
440
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Density, g/cm3 8.0
8.8
Embodied Carbon, kg CO2/kg material 7.9
8.3
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 350
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 350
960
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21
26
Strength to Weight: Bending, points 20
22
Thermal Shock Resistance, points 14
23

Alloy Composition

Aluminum (Al), % 0 to 0.25
0
Carbon (C), % 0 to 0.1
1.4 to 2.0
Chromium (Cr), % 48 to 52
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Iron (Fe), % 0 to 1.0
0 to 3.0
Manganese (Mn), % 0 to 0.3
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 44.5 to 52
0 to 3.0
Nitrogen (N), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.5
0
Tungsten (W), % 0
7.5 to 9.5