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R30075 Cobalt vs. C87900 Brass

R30075 cobalt belongs to the cobalt alloys classification, while C87900 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is C87900 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
110
Elongation at Break, % 12
25
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 82 to 98
41
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
480
Tensile Strength: Yield (Proof), MPa 480 to 840
240

Thermal Properties

Latent Heat of Fusion, J/g 320
190
Melting Completion (Liquidus), °C 1360
930
Melting Onset (Solidus), °C 1290
900
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 12
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
15
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
17

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.1
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 110
46
Embodied Water, L/kg 530
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
100
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
270
Stiffness to Weight: Axial, points 14 to 17
7.3
Stiffness to Weight: Bending, points 24 to 25
20
Strength to Weight: Axial, points 26 to 42
17
Strength to Weight: Bending, points 22 to 31
17
Thermal Diffusivity, mm2/s 3.5
37
Thermal Shock Resistance, points 21 to 29
16

Alloy Composition

Aluminum (Al), % 0 to 0.1
0 to 0.15
Antimony (Sb), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.050
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
63 to 69.2
Iron (Fe), % 0 to 0.75
0 to 0.4
Lead (Pb), % 0
0 to 0.25
Manganese (Mn), % 0 to 1.0
0 to 0.15
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
0 to 0.5
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.010
Silicon (Si), % 0 to 1.0
0.8 to 1.2
Sulfur (S), % 0 to 0.010
0 to 0.050
Tin (Sn), % 0
0 to 0.25
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Zinc (Zn), % 0
30 to 36