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C68300 Brass vs. R30016 Cobalt

C68300 brass belongs to the copper alloys classification, while R30016 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is C68300 brass and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220
Elongation at Break, % 15
8.4
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 40
85
Tensile Strength: Ultimate (UTS), MPa 430
1010
Tensile Strength: Yield (Proof), MPa 260
580

Thermal Properties

Latent Heat of Fusion, J/g 180
320
Melting Completion (Liquidus), °C 900
1360
Melting Onset (Solidus), °C 890
1270
Specific Heat Capacity, J/kg-K 390
450
Thermal Conductivity, W/m-K 120
15
Thermal Expansion, µm/m-K 20
14

Otherwise Unclassified Properties

Density, g/cm3 8.0
8.5
Embodied Carbon, kg CO2/kg material 2.8
7.7
Embodied Energy, MJ/kg 46
110
Embodied Water, L/kg 340
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 56
72
Resilience: Unit (Modulus of Resilience), kJ/m3 330
770
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 20
24
Strength to Weight: Axial, points 15
33
Strength to Weight: Bending, points 16
26
Thermal Diffusivity, mm2/s 38
3.9
Thermal Shock Resistance, points 14
24

Alloy Composition

Antimony (Sb), % 0.3 to 1.0
0
Cadmium (Cd), % 0 to 0.010
0
Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Copper (Cu), % 59 to 63
0
Iron (Fe), % 0
0 to 3.0
Lead (Pb), % 0 to 0.090
0
Manganese (Mn), % 0
0.5 to 2.0
Molybdenum (Mo), % 0
0 to 1.5
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0.3 to 1.0
0.2 to 2.0
Tin (Sn), % 0.050 to 0.2
0
Tungsten (W), % 0
3.5 to 5.5
Zinc (Zn), % 34.2 to 40.4
0
Residuals, % 0 to 0.5
0