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R30006 Cobalt vs. C69710 Brass

R30006 cobalt belongs to the cobalt alloys classification, while C69710 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is C69710 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 1.0
25
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 85
41
Tensile Strength: Ultimate (UTS), MPa 900
470
Tensile Strength: Yield (Proof), MPa 540
230

Thermal Properties

Latent Heat of Fusion, J/g 320
240
Melting Completion (Liquidus), °C 1400
930
Melting Onset (Solidus), °C 1290
880
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 11
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
8.7

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.3
Embodied Carbon, kg CO2/kg material 7.8
2.7
Embodied Energy, MJ/kg 110
44
Embodied Water, L/kg 500
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
99
Resilience: Unit (Modulus of Resilience), kJ/m3 670
250
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 23
19
Strength to Weight: Axial, points 29
16
Strength to Weight: Bending, points 24
16
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 26
16

Alloy Composition


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Arsenic (As), % 0
0.030 to 0.060
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
75 to 80
Iron (Fe), % 0 to 3.0
0 to 0.2
Lead (Pb), % 0
0.5 to 1.5
Manganese (Mn), % 0
0 to 0.4
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
2.5 to 3.5
Tungsten (W), % 4.0 to 6.0
0
Zinc (Zn), % 0
13.8 to 22
Residuals, % 0
0 to 0.5