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R30012 Cobalt vs. Commercially Pure Zirconium

R30012 cobalt belongs to the cobalt alloys classification, while commercially pure zirconium belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is commercially pure zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
98
Elongation at Break, % 1.0
18
Fatigue Strength, MPa 320
60
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 86
36
Tensile Strength: Ultimate (UTS), MPa 830
430
Tensile Strength: Yield (Proof), MPa 650
240

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Specific Heat Capacity, J/kg-K 440
270
Thermal Conductivity, W/m-K 15
22
Thermal Expansion, µm/m-K 12
5.5

Otherwise Unclassified Properties

Density, g/cm3 8.8
6.7
Embodied Water, L/kg 480
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
65
Resilience: Unit (Modulus of Resilience), kJ/m3 960
290
Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 22
19
Thermal Diffusivity, mm2/s 3.8
12
Thermal Shock Resistance, points 23
56

Alloy Composition

Carbon (C), % 1.4 to 2.0
0 to 0.050
Chromium (Cr), % 27 to 32
0 to 0.2
Cobalt (Co), % 47.5 to 64.1
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 0 to 3.0
0 to 0.2
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Nitrogen (N), % 0
0 to 0.025
Oxygen (O), % 0
0 to 0.16
Silicon (Si), % 0 to 2.0
0
Tungsten (W), % 7.5 to 9.5
0
Zirconium (Zr), % 0
94.7 to 100