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C99400 Brass vs. R30021 Cobalt

C99400 brass belongs to the copper alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is C99400 brass and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
220
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 44
86
Tensile Strength: Ultimate (UTS), MPa 460 to 550
700
Tensile Strength: Yield (Proof), MPa 230 to 370
500

Thermal Properties

Latent Heat of Fusion, J/g 230
330
Melting Completion (Liquidus), °C 1070
1350
Melting Onset (Solidus), °C 1020
1190
Specific Heat Capacity, J/kg-K 400
450
Thermal Expansion, µm/m-K 17
11

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.7
8.4
Embodied Carbon, kg CO2/kg material 2.8
8.0
Embodied Energy, MJ/kg 45
110
Embodied Water, L/kg 310
520

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 590
570
Stiffness to Weight: Axial, points 7.5
15
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 15 to 17
23
Strength to Weight: Bending, points 15 to 17
21
Thermal Shock Resistance, points 16 to 19
21

Alloy Composition

Aluminum (Al), % 0.5 to 2.0
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), % 83.5 to 96.5
0
Iron (Fe), % 1.0 to 3.0
0 to 3.0
Lead (Pb), % 0 to 0.25
0
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 1.0 to 3.5
2.0 to 3.0
Silicon (Si), % 0.5 to 2.0
0 to 1.5
Zinc (Zn), % 0.5 to 5.0
0
Residuals, % 0 to 0.3
0