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C47940 Brass vs. R30816 Cobalt

C47940 brass belongs to the copper alloys classification, while R30816 cobalt belongs to the cobalt 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 C47940 brass and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
210
Elongation at Break, % 14 to 34
23
Poisson's Ratio 0.31
0.3
Shear Modulus, GPa 40
81
Tensile Strength: Ultimate (UTS), MPa 380 to 520
1020
Tensile Strength: Yield (Proof), MPa 160 to 390
460

Thermal Properties

Latent Heat of Fusion, J/g 170
300
Melting Completion (Liquidus), °C 850
1540
Melting Onset (Solidus), °C 800
1460
Specific Heat Capacity, J/kg-K 380
420
Thermal Conductivity, W/m-K 110
13
Thermal Expansion, µm/m-K 20
12

Otherwise Unclassified Properties

Density, g/cm3 8.2
9.1
Embodied Carbon, kg CO2/kg material 2.8
20
Embodied Energy, MJ/kg 47
320
Embodied Water, L/kg 330
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 68 to 100
190
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 740
510
Stiffness to Weight: Axial, points 7.1
13
Stiffness to Weight: Bending, points 19
22
Strength to Weight: Axial, points 13 to 17
31
Strength to Weight: Bending, points 14 to 17
25
Thermal Diffusivity, mm2/s 36
3.3
Thermal Shock Resistance, points 13 to 17
28

Alloy Composition

Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 63 to 66
0
Iron (Fe), % 0.1 to 1.0
0 to 5.0
Lead (Pb), % 1.0 to 2.0
0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0.1 to 0.5
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tin (Sn), % 1.2 to 2.0
0
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 28.1 to 34.6
0
Residuals, % 0 to 0.4
0