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R31233 Cobalt vs. Grade 705C Zirconium

R31233 cobalt belongs to the cobalt alloys classification, while grade 705C zirconium belongs to the otherwise unclassified metals. 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 R31233 cobalt and the bottom bar is grade 705C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
98
Elongation at Break, % 17
13
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 85
36
Tensile Strength: Ultimate (UTS), MPa 1020
540
Tensile Strength: Yield (Proof), MPa 420
390

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Specific Heat Capacity, J/kg-K 440
270
Thermal Conductivity, W/m-K 12
18
Thermal Expansion, µm/m-K 13
5.7

Otherwise Unclassified Properties

Density, g/cm3 8.6
6.7
Embodied Water, L/kg 480
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
66
Resilience: Unit (Modulus of Resilience), kJ/m3 410
790
Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 33
22
Strength to Weight: Bending, points 26
22
Thermal Diffusivity, mm2/s 3.2
9.9
Thermal Shock Resistance, points 25
69

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.1
Chromium (Cr), % 23.5 to 27.5
0
Cobalt (Co), % 44.7 to 63.3
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 1.0 to 5.0
0 to 0.3
Manganese (Mn), % 0.1 to 1.5
0
Molybdenum (Mo), % 4.0 to 6.0
0
Nickel (Ni), % 7.0 to 11
0
Niobium (Nb), % 0
2.0 to 3.0
Nitrogen (N), % 0.030 to 0.12
0 to 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.010
Silicon (Si), % 0.050 to 1.0
0
Sulfur (S), % 0 to 0.020
0
Tungsten (W), % 1.0 to 3.0
0
Zirconium (Zr), % 0
91.9 to 98