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C43500 Brass vs. R30021 Cobalt

C43500 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 C43500 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, % 8.5 to 46
9.0
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 42
86
Tensile Strength: Ultimate (UTS), MPa 320 to 530
700
Tensile Strength: Yield (Proof), MPa 120 to 480
500

Thermal Properties

Latent Heat of Fusion, J/g 190
330
Melting Completion (Liquidus), °C 1000
1350
Melting Onset (Solidus), °C 970
1190
Specific Heat Capacity, J/kg-K 380
450
Thermal Conductivity, W/m-K 120
15
Thermal Expansion, µm/m-K 19
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 30
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.5
8.4
Embodied Carbon, kg CO2/kg material 2.7
8.0
Embodied Energy, MJ/kg 45
110
Embodied Water, L/kg 320
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44 to 120
57
Resilience: Unit (Modulus of Resilience), kJ/m3 65 to 1040
570
Stiffness to Weight: Axial, points 7.2
15
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 10 to 17
23
Strength to Weight: Bending, points 12 to 17
21
Thermal Diffusivity, mm2/s 37
3.8
Thermal Shock Resistance, points 11 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), % 79 to 83
0
Iron (Fe), % 0 to 0.050
0 to 3.0
Lead (Pb), % 0 to 0.090
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0
2.0 to 3.0
Silicon (Si), % 0
0 to 1.5
Tin (Sn), % 0.6 to 1.2
0
Zinc (Zn), % 15.4 to 20.4
0
Residuals, % 0 to 0.3
0