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Grade 704C Zirconium vs. R30016 Cobalt

Grade 704C zirconium belongs to the otherwise unclassified metals classification, while R30016 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is grade 704C zirconium and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 97
220
Elongation at Break, % 11
8.4
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 36
85
Tensile Strength: Ultimate (UTS), MPa 470
1010
Tensile Strength: Yield (Proof), MPa 310
580

Thermal Properties

Latent Heat of Fusion, J/g 240
320
Specific Heat Capacity, J/kg-K 270
450
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 5.9
14

Otherwise Unclassified Properties

Density, g/cm3 6.7
8.5
Embodied Water, L/kg 460
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
72
Resilience: Unit (Modulus of Resilience), kJ/m3 490
770
Stiffness to Weight: Axial, points 8.1
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 20
33
Strength to Weight: Bending, points 20
26
Thermal Diffusivity, mm2/s 12
3.9
Thermal Shock Resistance, points 58
24

Alloy Composition

Carbon (C), % 0 to 0.1
0.9 to 1.4
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
0 to 3.0
Manganese (Mn), % 0
0.5 to 2.0
Molybdenum (Mo), % 0
0 to 1.5
Nickel (Ni), % 0
0 to 3.0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0
0.2 to 2.0
Tin (Sn), % 1.0 to 2.0
0
Tungsten (W), % 0
3.5 to 5.5
Zirconium (Zr), % 92.9 to 99
0