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CC764S Brass vs. R30021 Cobalt

CC764S 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 CC764S 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, % 15
9.0
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 41
86
Tensile Strength: Ultimate (UTS), MPa 680
700
Tensile Strength: Yield (Proof), MPa 290
500

Thermal Properties

Latent Heat of Fusion, J/g 180
330
Melting Completion (Liquidus), °C 850
1350
Melting Onset (Solidus), °C 810
1190
Specific Heat Capacity, J/kg-K 400
450
Thermal Conductivity, W/m-K 94
15
Thermal Expansion, µm/m-K 20
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 36
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 2.9
8.0
Embodied Energy, MJ/kg 49
110
Embodied Water, L/kg 330
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
57
Resilience: Unit (Modulus of Resilience), kJ/m3 390
570
Stiffness to Weight: Axial, points 7.6
15
Stiffness to Weight: Bending, points 20
24
Strength to Weight: Axial, points 24
23
Strength to Weight: Bending, points 22
21
Thermal Diffusivity, mm2/s 30
3.8
Thermal Shock Resistance, points 22
21

Alloy Composition

Aluminum (Al), % 1.0 to 3.0
0
Antimony (Sb), % 0 to 0.050
0
Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 52 to 66
0
Iron (Fe), % 0.5 to 2.5
0 to 3.0
Lead (Pb), % 0 to 0.3
0
Manganese (Mn), % 0.3 to 4.0
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0 to 3.0
2.0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.1
0 to 1.5
Tin (Sn), % 0 to 0.3
0
Zinc (Zn), % 20.7 to 50.2
0