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C47940 Brass vs. R31539 Cobalt

C47940 brass belongs to the copper alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is C47940 brass and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220
Elongation at Break, % 14 to 34
13 to 22
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 40
86
Tensile Strength: Ultimate (UTS), MPa 380 to 520
1000 to 1340
Tensile Strength: Yield (Proof), MPa 160 to 390
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 170
320
Melting Completion (Liquidus), °C 850
1360
Melting Onset (Solidus), °C 800
1290
Specific Heat Capacity, J/kg-K 380
450
Thermal Conductivity, W/m-K 110
13
Thermal Expansion, µm/m-K 20
13

Otherwise Unclassified Properties

Density, g/cm3 8.2
8.4
Embodied Carbon, kg CO2/kg material 2.8
8.2
Embodied Energy, MJ/kg 47
110
Embodied Water, L/kg 330
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 68 to 100
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 740
780 to 2000
Stiffness to Weight: Axial, points 7.1
15
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 13 to 17
33 to 44
Strength to Weight: Bending, points 14 to 17
27 to 32
Thermal Diffusivity, mm2/s 36
3.5
Thermal Shock Resistance, points 13 to 17
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 63 to 66
0
Iron (Fe), % 0.1 to 1.0
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Lead (Pb), % 1.0 to 2.0
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0.1 to 0.5
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0
0 to 1.0
Tin (Sn), % 1.2 to 2.0
0
Zinc (Zn), % 28.1 to 34.6
0
Residuals, % 0 to 0.4
0