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R30075 Cobalt vs. C46500 Brass

R30075 cobalt belongs to the cobalt alloys classification, while C46500 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is C46500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
100
Elongation at Break, % 12
18 to 50
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 82 to 98
40
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
380 to 610
Tensile Strength: Yield (Proof), MPa 480 to 840
190 to 490

Thermal Properties

Latent Heat of Fusion, J/g 320
170
Melting Completion (Liquidus), °C 1360
900
Melting Onset (Solidus), °C 1290
890
Specific Heat Capacity, J/kg-K 450
380
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 12
21

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 110
47
Embodied Water, L/kg 530
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
99 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
170 to 1170
Stiffness to Weight: Axial, points 14 to 17
7.2
Stiffness to Weight: Bending, points 24 to 25
20
Strength to Weight: Axial, points 26 to 42
13 to 21
Strength to Weight: Bending, points 22 to 31
15 to 20
Thermal Diffusivity, mm2/s 3.5
38
Thermal Shock Resistance, points 21 to 29
13 to 20

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Arsenic (As), % 0
0.020 to 0.060
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
59 to 62
Iron (Fe), % 0 to 0.75
0 to 0.1
Lead (Pb), % 0
0 to 0.2
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0.5 to 1.0
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Zinc (Zn), % 0
36.2 to 40.5
Residuals, % 0
0 to 0.4