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R30605 Cobalt vs. C34500 Brass

R30605 cobalt belongs to the cobalt alloys classification, while C34500 brass belongs to the copper alloys. There are 24 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 R30605 cobalt and the bottom bar is C34500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
100
Elongation at Break, % 34
12 to 28
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 81
40
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
340 to 430
Tensile Strength: Yield (Proof), MPa 470 to 1600
120 to 180

Thermal Properties

Latent Heat of Fusion, J/g 290
170
Melting Completion (Liquidus), °C 1410
910
Melting Onset (Solidus), °C 1330
890
Specific Heat Capacity, J/kg-K 410
380
Thermal Conductivity, W/m-K 9.6
120
Thermal Expansion, µm/m-K 12
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
26
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
29

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.2
Embodied Carbon, kg CO2/kg material 9.8
2.6
Embodied Energy, MJ/kg 140
45
Embodied Water, L/kg 450
320

Common Calculations

Stiffness to Weight: Axial, points 12
7.1
Stiffness to Weight: Bending, points 21
19
Strength to Weight: Axial, points 33 to 55
12 to 15
Strength to Weight: Bending, points 25 to 36
13 to 16
Thermal Diffusivity, mm2/s 2.5
37
Thermal Shock Resistance, points 31 to 52
11 to 14

Alloy Composition


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Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 46.4 to 57
0
Copper (Cu), % 0
62 to 65
Iron (Fe), % 0 to 3.0
0 to 0.15
Lead (Pb), % 0
1.5 to 2.5
Manganese (Mn), % 1.0 to 2.0
0
Nickel (Ni), % 9.0 to 11
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.4
0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 14 to 16
0
Zinc (Zn), % 0
32 to 36.5
Residuals, % 0
0 to 0.4