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R30006 Cobalt vs. Nuclear Grade Hafnium

R30006 cobalt belongs to the cobalt alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
78
Elongation at Break, % 1.0
25
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 85
31
Tensile Strength: Ultimate (UTS), MPa 900
350
Tensile Strength: Yield (Proof), MPa 540
170

Thermal Properties

Latent Heat of Fusion, J/g 320
130
Specific Heat Capacity, J/kg-K 450
140
Thermal Expansion, µm/m-K 11
5.9

Otherwise Unclassified Properties

Density, g/cm3 8.6
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
73
Resilience: Unit (Modulus of Resilience), kJ/m3 670
180
Stiffness to Weight: Axial, points 14
3.3
Stiffness to Weight: Bending, points 23
11
Strength to Weight: Axial, points 29
7.4
Strength to Weight: Bending, points 24
8.4
Thermal Shock Resistance, points 26
55

Alloy Composition


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Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 0 to 3.0
0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0
Tungsten (W), % 4.0 to 6.0
0
Residuals, % 0
0 to 0.23