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R30605 Cobalt vs. C68400 Brass

R30605 cobalt belongs to the cobalt alloys classification, while C68400 brass belongs to the copper alloys. There are 24 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 R30605 cobalt and the bottom bar is C68400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 34
18
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 81
41
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
540
Tensile Strength: Yield (Proof), MPa 470 to 1600
310

Thermal Properties

Latent Heat of Fusion, J/g 290
210
Melting Completion (Liquidus), °C 1410
840
Melting Onset (Solidus), °C 1330
820
Specific Heat Capacity, J/kg-K 410
400
Thermal Conductivity, W/m-K 9.6
66
Thermal Expansion, µm/m-K 12
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
87
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
99

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.9
Embodied Carbon, kg CO2/kg material 9.8
2.7
Embodied Energy, MJ/kg 140
47
Embodied Water, L/kg 450
320

Common Calculations

Stiffness to Weight: Axial, points 12
7.5
Stiffness to Weight: Bending, points 21
20
Strength to Weight: Axial, points 33 to 55
19
Strength to Weight: Bending, points 25 to 36
19
Thermal Diffusivity, mm2/s 2.5
21
Thermal Shock Resistance, points 31 to 52
18

Alloy Composition


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Aluminum (Al), % 0
0 to 0.5
Boron (B), % 0
0.0010 to 0.030
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 46.4 to 57
0
Copper (Cu), % 0
59 to 64
Iron (Fe), % 0 to 3.0
0 to 1.0
Lead (Pb), % 0
0 to 0.090
Manganese (Mn), % 1.0 to 2.0
0.2 to 1.5
Nickel (Ni), % 9.0 to 11
0 to 0.5
Phosphorus (P), % 0 to 0.040
0.030 to 0.3
Silicon (Si), % 0 to 0.4
1.5 to 2.5
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.5
Tungsten (W), % 14 to 16
0
Zinc (Zn), % 0
28.6 to 39.3
Residuals, % 0
0 to 0.5