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R30006 Cobalt vs. C68700 Brass

R30006 cobalt belongs to the cobalt alloys classification, while C68700 brass belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is C68700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 85
41
Tensile Strength: Ultimate (UTS), MPa 900
390
Tensile Strength: Yield (Proof), MPa 540
140

Thermal Properties

Latent Heat of Fusion, J/g 320
190
Melting Completion (Liquidus), °C 1400
970
Melting Onset (Solidus), °C 1290
930
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 15
100
Thermal Expansion, µm/m-K 11
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
23
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
25

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.3
Embodied Carbon, kg CO2/kg material 7.8
2.8
Embodied Energy, MJ/kg 110
46
Embodied Water, L/kg 500
340

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 670
90
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 23
19
Strength to Weight: Axial, points 29
13
Strength to Weight: Bending, points 24
14
Thermal Diffusivity, mm2/s 3.9
30
Thermal Shock Resistance, points 26
13

Alloy Composition


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Aluminum (Al), % 0
1.8 to 2.5
Arsenic (As), % 0
0.020 to 0.1
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
76 to 79
Iron (Fe), % 0 to 3.0
0 to 0.060
Lead (Pb), % 0
0 to 0.070
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
17.8 to 22.2
Residuals, % 0
0 to 0.5