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C84000 Brass vs. R30021 Cobalt

C84000 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 C84000 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, % 27
9.0
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 42
86
Tensile Strength: Ultimate (UTS), MPa 250
700
Tensile Strength: Yield (Proof), MPa 140
500

Thermal Properties

Latent Heat of Fusion, J/g 190
330
Melting Completion (Liquidus), °C 1040
1350
Melting Onset (Solidus), °C 940
1190
Specific Heat Capacity, J/kg-K 380
450
Thermal Conductivity, W/m-K 72
15
Thermal Expansion, µm/m-K 18
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 17
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.4
Embodied Carbon, kg CO2/kg material 3.0
8.0
Embodied Energy, MJ/kg 49
110
Embodied Water, L/kg 330
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 58
57
Resilience: Unit (Modulus of Resilience), kJ/m3 83
570
Stiffness to Weight: Axial, points 7.2
15
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 8.2
23
Strength to Weight: Bending, points 10
21
Thermal Diffusivity, mm2/s 22
3.8
Thermal Shock Resistance, points 9.0
21

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.020
0
Boron (B), % 0 to 0.1
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), % 82 to 89
0
Iron (Fe), % 0 to 0.4
0 to 3.0
Lead (Pb), % 0 to 0.090
0
Manganese (Mn), % 0 to 0.010
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0.5 to 2.0
2.0 to 3.0
Phosphorus (P), % 0 to 0.050
0
Silicon (Si), % 0 to 0.0050
0 to 1.5
Sulfur (S), % 0.1 to 0.65
0
Tin (Sn), % 2.0 to 4.0
0
Zinc (Zn), % 5.0 to 14
0
Zirconium (Zr), % 0 to 0.1
0
Residuals, % 0 to 0.7
0