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R31539 Cobalt vs. Grade 705C Zirconium

R31539 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 (11, in this case) are not shown.

For each property being compared, the top bar is R31539 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, % 13 to 22
13
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
36
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
540
Tensile Strength: Yield (Proof), MPa 590 to 940
390

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Specific Heat Capacity, J/kg-K 450
270
Thermal Conductivity, W/m-K 13
18
Thermal Expansion, µm/m-K 13
5.7

Otherwise Unclassified Properties

Density, g/cm3 8.4
6.7
Embodied Water, L/kg 530
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
66
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
790
Stiffness to Weight: Axial, points 15
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33 to 44
22
Strength to Weight: Bending, points 27 to 32
22
Thermal Diffusivity, mm2/s 3.5
9.9
Thermal Shock Resistance, points 24 to 32
69

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0 to 0.1
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 0 to 0.75
0 to 0.3
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0
Niobium (Nb), % 0
2.0 to 3.0
Nitrogen (N), % 0 to 0.25
0 to 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 1.0
0
Zirconium (Zr), % 0
91.9 to 98