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G-CoCr28 Cobalt vs. Grade 705C Zirconium

G-CoCr28 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 G-CoCr28 cobalt and the bottom bar is grade 705C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
98
Elongation at Break, % 6.7
13
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 83
36
Tensile Strength: Ultimate (UTS), MPa 560
540
Tensile Strength: Yield (Proof), MPa 260
390

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 8.5
18
Thermal Expansion, µm/m-K 14
5.7

Otherwise Unclassified Properties

Density, g/cm3 8.1
6.7
Embodied Water, L/kg 440
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
66
Resilience: Unit (Modulus of Resilience), kJ/m3 160
790
Stiffness to Weight: Axial, points 15
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 19
22
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 2.2
9.9
Thermal Shock Resistance, points 14
69

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.1
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 48 to 52
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 9.7 to 24.5
0 to 0.3
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
0
Niobium (Nb), % 0 to 0.5
2.0 to 3.0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0.5 to 1.5
0
Sulfur (S), % 0 to 0.030
0
Zirconium (Zr), % 0
91.9 to 98