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R30155 Cobalt vs. C32000 Brass

R30155 cobalt belongs to the iron alloys classification, while C32000 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 C32000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 34
6.8 to 29
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
41
Shear Strength, MPa 570
180 to 280
Tensile Strength: Ultimate (UTS), MPa 850
270 to 470
Tensile Strength: Yield (Proof), MPa 390
78 to 390

Thermal Properties

Latent Heat of Fusion, J/g 300
190
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1470
1020
Melting Onset (Solidus), °C 1420
990
Specific Heat Capacity, J/kg-K 450
380
Thermal Conductivity, W/m-K 12
160
Thermal Expansion, µm/m-K 14
19

Otherwise Unclassified Properties

Base Metal Price, % relative 80
28
Density, g/cm3 8.5
8.7
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
30 to 59
Resilience: Unit (Modulus of Resilience), kJ/m3 370
28 to 680
Stiffness to Weight: Axial, points 14
7.1
Stiffness to Weight: Bending, points 23
18
Strength to Weight: Axial, points 28
8.8 to 15
Strength to Weight: Bending, points 24
11 to 16
Thermal Diffusivity, mm2/s 3.2
47
Thermal Shock Resistance, points 21
9.5 to 16

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
83.5 to 86.5
Iron (Fe), % 24.3 to 36.2
0 to 0.1
Lead (Pb), % 0
1.5 to 2.2
Manganese (Mn), % 1.0 to 2.0
0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0 to 0.25
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
10.6 to 15
Residuals, % 0
0 to 0.4