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R30006 Cobalt vs. C21000 Brass

R30006 cobalt belongs to the cobalt alloys classification, while C21000 brass belongs to the copper alloys. There are 26 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 R30006 cobalt and the bottom bar is C21000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 1.0
2.9 to 50
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 85
43
Tensile Strength: Ultimate (UTS), MPa 900
240 to 450
Tensile Strength: Yield (Proof), MPa 540
69 to 440

Thermal Properties

Latent Heat of Fusion, J/g 320
200
Melting Completion (Liquidus), °C 1400
1070
Melting Onset (Solidus), °C 1290
1050
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 15
230
Thermal Expansion, µm/m-K 11
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
56
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
57

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.8
Embodied Carbon, kg CO2/kg material 7.8
2.6
Embodied Energy, MJ/kg 110
42
Embodied Water, L/kg 500
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 670
21 to 830
Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 23
18
Strength to Weight: Axial, points 29
7.4 to 14
Strength to Weight: Bending, points 24
9.6 to 15
Thermal Diffusivity, mm2/s 3.9
69
Thermal Shock Resistance, points 26
8.1 to 15

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
Copper (Cu), % 0
94 to 96
Iron (Fe), % 0 to 3.0
0 to 0.050
Lead (Pb), % 0
0 to 0.030
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
Zinc (Zn), % 0
3.7 to 6.0
Residuals, % 0
0 to 0.2