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C48500 Brass vs. R31538 Cobalt

C48500 brass belongs to the copper alloys classification, while R31538 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 C48500 brass and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220
Elongation at Break, % 13 to 40
13 to 23
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 39
86
Tensile Strength: Ultimate (UTS), MPa 400 to 500
1020 to 1360
Tensile Strength: Yield (Proof), MPa 160 to 320
580 to 930

Thermal Properties

Latent Heat of Fusion, J/g 170
320
Melting Completion (Liquidus), °C 900
1360
Melting Onset (Solidus), °C 890
1290
Specific Heat Capacity, J/kg-K 380
450
Thermal Conductivity, W/m-K 120
13
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 29
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.1
8.4
Embodied Carbon, kg CO2/kg material 2.7
8.1
Embodied Energy, MJ/kg 46
110
Embodied Water, L/kg 330
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 56 to 140
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 500
750 to 1920
Stiffness to Weight: Axial, points 7.1
15
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 14 to 17
34 to 45
Strength to Weight: Bending, points 15 to 17
27 to 32
Thermal Diffusivity, mm2/s 38
3.5
Thermal Shock Resistance, points 13 to 17
25 to 33

Alloy Composition


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Carbon (C), % 0
0.15 to 0.35
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Copper (Cu), % 59 to 62
0
Iron (Fe), % 0 to 0.1
0 to 0.75
Lead (Pb), % 1.3 to 2.2
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0
0 to 1.0
Tin (Sn), % 0.5 to 1.0
0
Zinc (Zn), % 34.3 to 39.2
0
Residuals, % 0 to 0.4
0