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CC762S Brass vs. R30021 Cobalt

CC762S 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 CC762S 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, % 7.3
9.0
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 43
86
Tensile Strength: Ultimate (UTS), MPa 840
700
Tensile Strength: Yield (Proof), MPa 540
500

Thermal Properties

Latent Heat of Fusion, J/g 200
330
Melting Completion (Liquidus), °C 920
1350
Melting Onset (Solidus), °C 870
1190
Specific Heat Capacity, J/kg-K 420
450
Thermal Conductivity, W/m-K 51
15
Thermal Expansion, µm/m-K 20
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 32
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.0
8.4
Embodied Carbon, kg CO2/kg material 3.1
8.0
Embodied Energy, MJ/kg 51
110
Embodied Water, L/kg 350
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
57
Resilience: Unit (Modulus of Resilience), kJ/m3 1290
570
Stiffness to Weight: Axial, points 7.8
15
Stiffness to Weight: Bending, points 20
24
Strength to Weight: Axial, points 29
23
Strength to Weight: Bending, points 25
21
Thermal Diffusivity, mm2/s 15
3.8
Thermal Shock Resistance, points 27
21

Alloy Composition

Aluminum (Al), % 3.0 to 7.0
0
Antimony (Sb), % 0 to 0.030
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), % 57 to 67
0
Iron (Fe), % 1.5 to 4.0
0 to 3.0
Lead (Pb), % 0 to 0.2
0
Manganese (Mn), % 2.5 to 5.0
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 0.2
0
Zinc (Zn), % 13.4 to 36
0