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R30155 Cobalt vs. C21000 Brass

R30155 cobalt belongs to the iron alloys classification, while C21000 brass belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is C21000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 34
2.9 to 50
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 81
43
Shear Strength, MPa 570
180 to 280
Tensile Strength: Ultimate (UTS), MPa 850
240 to 450
Tensile Strength: Yield (Proof), MPa 390
69 to 440

Thermal Properties

Latent Heat of Fusion, J/g 300
200
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1470
1070
Melting Onset (Solidus), °C 1420
1050
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 12
230
Thermal Expansion, µm/m-K 14
18

Otherwise Unclassified Properties

Base Metal Price, % relative 80
30
Density, g/cm3 8.5
8.8
Embodied Carbon, kg CO2/kg material 9.7
2.6
Embodied Energy, MJ/kg 150
42
Embodied Water, L/kg 300
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 370
21 to 830
Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 23
18
Strength to Weight: Axial, points 28
7.4 to 14
Strength to Weight: Bending, points 24
9.6 to 15
Thermal Diffusivity, mm2/s 3.2
69
Thermal Shock Resistance, points 21
8.1 to 15

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
94 to 96
Iron (Fe), % 24.3 to 36.2
0 to 0.050
Lead (Pb), % 0
0 to 0.030
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
0
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
3.7 to 6.0
Residuals, % 0
0 to 0.2