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C87500 Brass vs. R30035 Cobalt

C87500 brass belongs to the copper alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is C87500 brass and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220 to 230
Elongation at Break, % 18
9.0 to 46
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 42
84 to 89
Tensile Strength: Ultimate (UTS), MPa 460
900 to 1900
Tensile Strength: Yield (Proof), MPa 190
300 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 920
1440
Melting Onset (Solidus), °C 820
1320
Specific Heat Capacity, J/kg-K 410
440
Thermal Conductivity, W/m-K 28
11
Thermal Expansion, µm/m-K 18
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 27
100
Density, g/cm3 8.3
8.7
Embodied Carbon, kg CO2/kg material 2.7
10
Embodied Energy, MJ/kg 44
140
Embodied Water, L/kg 300
410

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
160 to 320
Resilience: Unit (Modulus of Resilience), kJ/m3 160
210 to 5920
Stiffness to Weight: Axial, points 7.4
14 to 15
Stiffness to Weight: Bending, points 19
23 to 24
Strength to Weight: Axial, points 16
29 to 61
Strength to Weight: Bending, points 16
24 to 39
Thermal Diffusivity, mm2/s 8.3
3.0
Thermal Shock Resistance, points 17
23 to 46

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Boron (B), % 0
0 to 0.015
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
29.1 to 39
Copper (Cu), % 79 to 85
0
Iron (Fe), % 0
0 to 1.0
Lead (Pb), % 0 to 0.5
0
Manganese (Mn), % 0
0 to 0.15
Molybdenum (Mo), % 0
9.0 to 10.5
Nickel (Ni), % 0
33 to 37
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 3.0 to 5.0
0 to 0.15
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 1.0
Zinc (Zn), % 12 to 16
0
Residuals, % 0 to 0.5
0