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C68400 Brass vs. R31537 Cobalt

C68400 brass belongs to the copper alloys classification, while R31537 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is C68400 brass and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 18
14 to 23
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 41
87
Tensile Strength: Ultimate (UTS), MPa 540
1000 to 1340
Tensile Strength: Yield (Proof), MPa 310
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 210
320
Melting Completion (Liquidus), °C 840
1360
Melting Onset (Solidus), °C 820
1290
Specific Heat Capacity, J/kg-K 400
450
Thermal Conductivity, W/m-K 66
13
Thermal Expansion, µm/m-K 20
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 87
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 2.7
8.1
Embodied Energy, MJ/kg 47
110
Embodied Water, L/kg 320
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 460
780 to 1990
Stiffness to Weight: Axial, points 7.5
15
Stiffness to Weight: Bending, points 20
24
Strength to Weight: Axial, points 19
33 to 44
Strength to Weight: Bending, points 19
26 to 32
Thermal Diffusivity, mm2/s 21
3.4
Thermal Shock Resistance, points 18
24 to 32

Alloy Composition


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Aluminum (Al), % 0 to 0.5
0
Boron (B), % 0.0010 to 0.030
0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.9 to 69
Copper (Cu), % 59 to 64
0
Iron (Fe), % 0 to 1.0
0 to 0.75
Lead (Pb), % 0 to 0.090
0
Manganese (Mn), % 0.2 to 1.5
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0 to 0.5
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0.030 to 0.3
0
Silicon (Si), % 1.5 to 2.5
0 to 1.0
Tin (Sn), % 0 to 0.5
0
Zinc (Zn), % 28.6 to 39.3
0
Residuals, % 0 to 0.5
0