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R30155 Cobalt vs. C69400 Brass

R30155 cobalt belongs to the iron alloys classification, while C69400 brass belongs to the copper alloys. There are 27 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 R30155 cobalt and the bottom bar is C69400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 34
17
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
42
Shear Strength, MPa 570
350
Tensile Strength: Ultimate (UTS), MPa 850
570
Tensile Strength: Yield (Proof), MPa 390
270

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1470
920
Melting Onset (Solidus), °C 1420
820
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 12
26
Thermal Expansion, µm/m-K 14
18

Otherwise Unclassified Properties

Base Metal Price, % relative 80
27
Density, g/cm3 8.5
8.3
Embodied Carbon, kg CO2/kg material 9.7
2.7
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 300
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
80
Resilience: Unit (Modulus of Resilience), kJ/m3 370
340
Stiffness to Weight: Axial, points 14
7.4
Stiffness to Weight: Bending, points 23
19
Strength to Weight: Axial, points 28
19
Strength to Weight: Bending, points 24
18
Thermal Diffusivity, mm2/s 3.2
7.7
Thermal Shock Resistance, points 21
20

Alloy Composition

Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
80 to 83
Iron (Fe), % 24.3 to 36.2
0 to 0.2
Lead (Pb), % 0
0 to 0.3
Manganese (Mn), % 1.0 to 2.0
0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
11.5 to 16.5
Residuals, % 0
0 to 0.5