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C66200 Brass vs. R30021 Cobalt

C66200 brass belongs to the copper alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is C66200 brass and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 8.0 to 15
9.0
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 42
86
Tensile Strength: Ultimate (UTS), MPa 450 to 520
700
Tensile Strength: Yield (Proof), MPa 410 to 480
500

Thermal Properties

Latent Heat of Fusion, J/g 200
330
Melting Completion (Liquidus), °C 1070
1350
Melting Onset (Solidus), °C 1030
1190
Specific Heat Capacity, J/kg-K 390
450
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 18
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 36
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.7
8.4
Embodied Carbon, kg CO2/kg material 2.7
8.0
Embodied Energy, MJ/kg 43
110
Embodied Water, L/kg 320
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 40 to 66
57
Resilience: Unit (Modulus of Resilience), kJ/m3 760 to 1030
570
Stiffness to Weight: Axial, points 7.2
15
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 14 to 17
23
Strength to Weight: Bending, points 15 to 16
21
Thermal Diffusivity, mm2/s 45
3.8
Thermal Shock Resistance, points 16 to 18
21

Alloy Composition

Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 86.6 to 91
0
Iron (Fe), % 0 to 0.050
0 to 3.0
Lead (Pb), % 0 to 0.050
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0.3 to 1.0
2.0 to 3.0
Phosphorus (P), % 0.050 to 0.2
0
Silicon (Si), % 0
0 to 1.5
Tin (Sn), % 0.2 to 0.7
0
Zinc (Zn), % 6.5 to 12.9
0
Residuals, % 0 to 0.5
0